What is the construction and purpose of an ABS speed sensor?

The ABS speed sensor is an electronic component mounted at the wheel, hub, or steering knuckle that reads the wheel's rotational speed. A typical sensor consists of a sensor housing, a measuring tip, a cable or socket, and a plug matched to the car's installation. Its task is to transmit a signal to the ABS controller, which then controls the operation of the braking system.

What is the ABS speed sensor used for?

The ABS speed sensor is used to monitor the rotation of each wheel during driving and braking. Based on this data, the controller recognizes the moment of traction loss and can appropriately control braking pressure. Without a proper signal, not only ABS functions but also selected stability assistance systems may stop working.

What is the construction and function of an impulse ring?

The impulse ring is a component that works with the ABS sensor, located at the hub or integrated with the wheel bearing. Its task is to create a reference signal that the sensor reads as wheel rotation. Depending on the design, it can take the form of a toothed ring or a magnetic ring, so the sensor type and the solution used by the manufacturer must be taken into account during selection.

How to choose the right ABS speed sensor for a car?

It is best to compare the OEM number, vehicle location, mounting side, and plug type. You also need to check whether a front or rear sensor is needed and whether the installation uses an active or passive version. In many cases, comparing interchangeable numbers is also helpful.

What symptoms indicate a problem with the ABS sensor?

Most often, an ABS warning light appears, errors are saved in the controller, or unstable readings from one wheel occur during diagnostics. Sometimes, the ABS may fail during hard braking, or ESP and traction control may malfunction. Similar symptoms can also be caused by a damaged cable, connector, or impulse ring.

What should be paid attention to when installing an ABS speed sensor?

It is important to clean the mounting area, check the condition of the socket, and correctly route the cable in the factory brackets. You should also ensure that the sensor works with the correct ring and has no play in the mounting. After installation, it is worth checking for errors in the controller and reading the speed of each wheel.

ABS speed sensor

At Global Parts, we offer a wide selection of original used car parts, including ABS speed sensors for many popular car brands such as BMW, Mini, Mercedes, Audi, Volkswagen, and others. Our ABS speed sensors undergo quality control to ensure you receive a top-quality product.

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Mercedes W176 Front ABS Brake Wheel Speed Sensor Cable A2465402510

£13.95

Free delivery: Aug 03

If paid before 14:00

Part no. A9079050100

Mercedes Sprinter W907 ABS Wheel Speed Sensor Front Left Right N/O/S A9079050100

£37.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2045400317

Mercedes-Benz C W204 Wheel Speed Sensor Rear Left Right RPM Cable A2045400317

£13.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2035400417

Mercedes CLK W203 C209 Front ABS Wheel Speed Sensor A2035400417

£13.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2469059402

Mercedes W176 Wheel Speed ABS Sensor Rear Left N/S A2469059402

£18.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2125402117

Mercedes W204 W212 ABS Sensor Front Wheel Wiring Speed Sensor A2125402117

£13.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2049057900

Mercedes W204 Wheel ABS Speed Sensor Front Left Right N/O/S Cable A2049057900

£18.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2075400017

Wheel Speed Sensor Mercedes W207 Front ABS Brake Cable Wiring A2075400017

£13.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2059058003

ABS Sensor Mercedes W205 Front Axle Right O/S Speed Sensor A2059058003

£13.95

Free delivery: Aug 03

If paid before 14:00

Part no. A1695401517

Mercedes-Benz A-Class W169 Rear ABS Brake Wheel Speed Sensor Cable A1695401517

£13.95

Free delivery: Aug 03

If paid before 14:00

Part no. A1695401417

Speed Sensor Mercedes W169 W245 Front Left Right N/O/S Control Unit A1695401417

£18.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2059058503

Mercedes C205 Rear Axle Right Left N/O/S Speed Sensor ABS Sensor A2059058503

£18.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2479050100

Mercedes W177 Speed Sensor Axle ABS Sensor Rear Left Right N/O/S A2479050100

£13.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2125400117

Mercedes W212 Wheel Speed Sensor Front Left Right RPM Cable A2125400117

£13.95

Free delivery: Aug 03

If paid before 14:00

Part no. A9075401905

Mercedes W907 Wheel Brake ABS Speed Sensor Front Left N/S Cable A9075401905

£28.95

Free delivery: Aug 03

If paid before 14:00

Part no. A0065426718

Mercedes W176 W246 Speed Sensor Wheel ABS Front Left Right N/O/S A0065426718

£13.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2035401317

Speed Sensor Mercedes W203 W209 Rear Left N/S Wheel Brake ABS Cable A2035401317

£18.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2115402417

Wheel Speed Sensor Mercedes W211 ABS Cable Rear Left Right A2115402417

£18.95

Free delivery: Aug 03

If paid before 14:00

Part no. A1669052601

Mercedes ML W166 Wheel Speed Sensor Front Left Right N/O/S ABS Cable A1669052601

£28.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2139050601

Mercedes W213 Wheel ABS Speed Sensor Front Axle Left N/S A2139050601

£13.95

Free delivery: Aug 03

If paid before 14:00

Part no. A1725401405

Mercedes R172 Front ABS Brake Wheel Speed Sensor Cable Right O/S A1725401405

£28.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2135403605

Mercedes W213 S213 ABS Sensor Brake Axle Suspension Front Right O/S A2135403605

£18.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2125400217

Mercedes W212 CLS C218 Wheel ABS Speed Sensor Front Right O/S A2125400217

£13.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2059058103

Speed Sensor Mercedes W205 Front Left Rotational Speed ABS Sensor A2059058103

£18.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2049053005

Mercedes W204 C63 AMG Wheel ABS Speed Sensor Front Left Right N/O/S A2049053005

£18.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2475401000

Wheel Speed Sensor Mercedes C118 W177 W247 Cable Rear Right O/S A2475401000

£28.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2475401100

Wheel Speed Sensor Mercedes C118 W177 W247 Cable Rear Left N/S A2475401100

£28.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2045404605

Mercedes S204 W204 ABS Sensor Brake Caliper Rear Left N/S Cable A2045404605

£13.95

Free delivery: Aug 03

If paid before 14:00

Part no. A1695400417

Mercedes A B Class W169 W245 Speed Sensor Front Left Right N/O/S A1695400417

£32.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2059050205

Mercedes W205 Wheel ABS Speed Sensor Front Axle Right O/S A2059050205

£32.95

Free delivery: Aug 03

If paid before 14:00

Part no. A6395401017

Mercedes W639 Front Axle Rotational Speed Sensor Left Right N/O/S A6395401017

£13.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2475400500

Mercedes W177 Wheel ABS Speed Sensor Front Axle Left N/S A2475400500

£18.95

Free delivery: Aug 03

If paid before 14:00

Part no. A1725400617

Mercedes SLK R172 Wheel Speed Sensor Rear Left N/S ABS Cable A1725400617

£18.95

Free delivery: Aug 03

If paid before 14:00

Part no. A1725400017

Mercedes R172 Front Wheel Speed ABS Sensor Left Right N/O/S A1725400017

£13.95

Free delivery: Aug 03

If paid before 14:00

Part no. A1725400717

Mercedes SLK R172 Wheel Speed Sensor Rear Right O/S ABS Cable A1725400717

£23.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2115402917

Mercedes W211 C219 Wheel ABS Speed Sensor Front Left Right N/O/S A2115402917

£18.95

Free delivery: Aug 03

If paid before 14:00

Part no. A00010921004

Mercedes W251 Spped Servotronic Valve Power Steering Rack Sensor A00010921004

£56.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2215400317

Mercedes W221 ABS Wheel Speed Sensor Front Left Right N/O/S A2215400317

£13.95

Free delivery: Aug 03

If paid before 14:00

Part no. A1695401117-1

Mercedes W245 ABS Wheel Speed Sensor Unit Front Left Right N/O/S A1695401117

£13.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2469057603

Wheel Speed Sensor Mercedes W156 W176 Rear Left Right N/O/S ABS A2469057603

£32.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2049054305

Mercedes W204 Brake Wheel ABS Speed Sensor Front Right O/S A2049054305

£18.95

Free delivery: Aug 03

If paid before 14:00

Part no. A9075403505

Mercedes Sprinter W907 ABS Sensor Wheel Wiring Speed Rear Right O/S A9075403505

£23.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2055462280

Mercedes W205 ABS Speed Sensor Bracket Holder Front Right O/S A2055462280

£28.95

Free delivery: Aug 03

If paid before 14:00

Part no. A1669054002

ABS Speed Sensor Mercedes ML W166 GLE C292 Front Left Right N/O/S A1669054002

£28.95

Free delivery: Aug 03

If paid before 14:00

Part no. A1635422018

Mercedes W163 Rear Axle ABS Speed Wheel Sensor Left N/S Side A1635422018

£42.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2479050000

Mercedes W177 ABS Speed Sensor Front Left Right N/O/S A2045400117

£23.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2219050201

ABS Sensor Mercedes W221 Brake Axle Suspension Rear Right O/S A2219050201

£18.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2139055703

Mercedes W205 W213 ABS Wheel Speed Sensor Rear Left Right N/O/S A2139055703

£13.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2539052400

ABS Sensor Mercedes X253 C253 Rear Axle Right Speed Sensor A2539052400

£28.95

Free delivery: Aug 03

If paid before 14:00

Part no. A1695401217

Mercedes W169 W245 ABS Sensor Unit Rear Left Right N/O/S A1695401217

£13.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2139052104

Mercedes W213 C238 ABS Speed Sensor Front Axle Left Right N/O/S A2139052104

£18.95

Free delivery: Aug 03

If paid before 14:00

Part no. A1649058400

Mercedes W164 Front Wheel Speed Sensor ABS Wiring Left Right N/O/S A1649058400

£18.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2135403905-1

Mercedes W213 C238 Rear Axle Wheel ABS Sensor Wiring Left N/S A2135403905

£13.95

Free delivery: Aug 03

If paid before 14:00

Part no. A1715400213

Mercedes SLK R171 Wheel ABS Speed Sensor Rear Right O/S RPM Cable A1715400213

£18.95

Free delivery: Aug 03

If paid before 14:00

Part no. A1715400117

Mercedes SLK R171 Wheel ABS Speed Sensor Rear Left N/S RPM Cable A1715400117

£18.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2115402317

Mercedes W211 C219 Wheel ABS Speed Sensor Front Left Right N/O/S A2115402317

£13.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2215400917

Mercedes C216 W221 Rear ABS Wheel Speed Sensor A2215400917

£61.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2035401417

Mercedes W209 Wheel ABS Speed Sensor Rear Right O/S RPM Cable A2035401417

£18.95

Free delivery: Aug 03

If paid before 14:00

Part no. A2075400317

Mercedes W207 Wheel Speed Sensor Rear Left Right N/O/S ABS Cable A2075400317

Product currently unavailable

Part no. A9075402005

Mercedes Sprinter W907 Wheel ABS Speed Sensor Front Right O/S A9075402005

Product currently unavailable

Part no. A2045400117

Mercedes W204 Wheel ABS Speed Sensor Front Left Right N/O/S Cable A2045400117

Product currently unavailable

Part no. A2129053603

Mercedes W212 Wheel ABS Speed Sensor Rear Left Right N/O/S Cable A2129051001

Product currently unavailable

Part no. A4479059601

Mercedes Vito W447 Wheel ABS Speed Sensor Front Left N/S Cable A4479059601

Product currently unavailable

Part no. A9075403205

Mercedes Sprinter W907 ABS Sensor Front Wheel Wiring Speed A9075403205

Product currently unavailable

Part no. A2115403017

Mercedes W211 C219 Wheel ABS Speed Sensor Rear Left Right N/O/S A2115403017

Product currently unavailable

Part no. A2205453128

Mercedes W207 Wheel Speed Sensor Rear Left Right N/O/S ABS Cable A2205453128

Product currently unavailable

Part no. A2049057902

Mercedes W204 Wheel ABS Speed Sensor Front Left Right Cable AMG A2049057902

Product currently unavailable

Part no. A4479056802

Mercedes Vito W447 Rear ABS Speed Sensor Unit Wire Cable Left N/S A4479056802

Product currently unavailable

Part no. A2215400117

Mercedes W221 Wheel ABS Speed Sensor Rear Right O/S A2215400117

Product currently unavailable

Part no. A2079059502

Mercedes W207 ABS Speed Sensor Front Left Right N/O/S Cable A2079059502

Product currently unavailable

Part no. A2049052905

Mercedes W204 Wheel ABS Speed Sensor Front Left Right N/O/S Cable A2049052905

Product currently unavailable

Part no. A2059050105

Mercedes W205 Wheel ABS Speed Sensor Front Axle Left N/S A2059050105

Product currently unavailable

Part no. A1665400105

Brake Pad Wear Sensor Mercedes ML W166 GLE C292 Front Right O/S A1665400105

Product currently unavailable

Part no. A4475408741

Mercedes W447 ABS Sensor Front Brake Speed Sensor Wiring A4475408741

Product currently unavailable

Part no. A2479058600

Mercedes C118 W177 W247 Rear Axle Rotational Speed Sensor A2479058600

Product currently unavailable

Part no. A1635421918

Mercedes ML W163 ABS Wheel Speed Sensor Front Right O/S A1635421918

Product currently unavailable

Part no. A2539052500

ABS Sensor Mercedes X253 C253 Rear Axle Left Speed Sensor A2539052500

Product currently unavailable

Part no. A9069050601

Mercedes W906 Front Axle Rotational ABS Speed Sensor A9069050601

Product currently unavailable

Part no. A9075403405

Mercedes Sprinter W907 ABS Sensor Wheel Wiring Speed Rear Left N/S A9075403405

Product currently unavailable

Part no. A6395400417

Mercedes Vito W639 W245 Speed Sensor Front Left N/S A6395400417

Product currently unavailable

Part no. A9065403917

Mercedes Sprinter W906 Wheel ABS Speed Sensor Front Left Right N/O/S A9065403917

Product currently unavailable

Part no. A2219057100

Mercedes W221 Wheel Speed Sensor Rear Left Right N/O/S ABS Cable A2219057100

Product currently unavailable

Part no. A1635421818

Mercedes ML W163 ABS Wheel Speed Sensor Front Left N/S A1635421818

Product currently unavailable

Part no. A0045423418

Mercedes C215 C216 W220 W221 R230 Accelerator Speed Sensor Module A0045423418

Product currently unavailable

Part no. A9065400317

Mercedes W906 Front ABS Wheel Speed Sensor A9065400317

Product currently unavailable

Part no. A1649058400-1

Mercedes W164 Wheel Speed Sensor ABS Wiring Front Left Right N/O/S A1649058400

Product currently unavailable

Part no. A2539053400

Mercedes GLC C253 Front ABS Wheel Speed Sensor Left N/S A2539053400

Product currently unavailable

Part no. A2539053500

Mercedes GLC X253 Front Axle ABS Wheel Speed Sensor Left N/S A2539053500

Product currently unavailable

Part no. A2135403705

Mercedes W213 Front ABS Wheel Speed Sensor Left N/S A2135403705

Product currently unavailable

Part no. A6395402217

ABS Sensor Mercedes Vito W639 Brake Axle Suspension Rear Right O/S A6395402217

Product currently unavailable

Part no. A6395400917

Mercedes Vito Viano W639 ABS Sensor Rear Axle Brake Speed Sensor A6395400917

Product currently unavailable

Part no. A2319053201

Mercedes R231 Wheel ABS Speed Sensor Front Left Right N/O/S Cable A2319053201

Product currently unavailable

Part no. A4479057002

Mercedes W447 Front Wheel ABS Speed Sensor A4479057002

Product currently unavailable

Part no. A4479056902

Mercedes W447 Front Axle Rotational Speed Sensor ABS Sensor Left N/S A4479056902

Product currently unavailable

Part no. A9075403005

Mercedes Sprinter W907 Wheel Brakes Wear Sensor Wiring Rear Axle A9075403005

Product currently unavailable

Part no. A2475400400

ABS Sensor Mercedes W177 W247 Front Axle Right O/S Speed Sensor A2475400400

Product currently unavailable

Part no. A1725401705

Mercedes R172 Rear ABS Brake Wheel Speed Sensor Cable Right O/S A1725401705

Product currently unavailable

Part no. A1635422118

Mercedes W163 ABS Wheel Speed Rotational Speed Sensor Rear Right O/S A1635422118

Product currently unavailable

Part no. A2315400317

Mercedes R231 Wheel ABS Speed Sensor Rear Left Right N/O/S Cable A2315400317

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ABS wheel speed sensors for accurate braking system data

Precise ABS wheel speed sensors

The ABS speed sensor is a key component of the ABS (Antilock Braking System) that monitors the rotational speed of each wheel. Thanks to its operation, the ABS system can prevent wheel lock-up during braking, which increases vehicle stability and allows for effective maneuvering in difficult road conditions. In the Global Parts automotive store, you will find a wide selection of used car parts, including the ABS speed sensor, perfectly matched to BMW, Audi, Mercedes, Volkswagen, Mini, and many other brands.

Construction and operation of the ABS speed sensor in practice

The ABS speed sensor (wheel speed sensor) is an electronic component mounted at the wheel hub or steering knuckle, designed to measure wheel rotational speed with an accuracy of a few revolutions per minute. Modern vehicles use two basic types of sensors:

inductive (passive) – generate an alternating current (AC) proportional to the rotational speed,
magnetoresistive / active (Hall effect) – powered by 5–12 V, generating a digital square wave signal. The signal from the sensor is sent to the ABS controller (hydraulic-electronic module), which analyzes the speed differences between wheels several times per second. If one wheel begins to decelerate rapidly (e.g., on a slippery surface), the system reduces braking pressure on that specific wheel, preventing it from locking up. The ABS speed sensor works directly with:
the impulse ring (ABS tone ring),
the wheel bearing with a built-in magnetic ring,
the ESP/ASR module (traction control),
the hill-start assist system. This means that the compatibility and matching of the sensor to the specific engine version and vehicle year are important not only for the ABS but also for the entire electronic stability control system.

Construction and purpose of ABS speed sensors

The ABS speed sensor is an electronic component of the braking system that reads the rotational speed of an individual wheel and transmits the signal to the controller. A typical unit consists of a sensor body, a cable or socket, a reading tip, and a plug matched to the vehicle's electrical system. The sensor is mounted at the hub, steering knuckle, or bearing and must work with the appropriate impulse or magnetic ring. In practice, compatibility is determined not only by the OEM number but also by the mounting side, connector type, and mounting method.

What functions does the ABS speed sensor perform?

The ABS speed sensor plays key roles in the operation of the ABS system:

Wheel speed measurement – Transmits data to the ABS module, which analyzes the speed of each wheel.
Prevention of wheel lock-up – Supports the operation of the ABS system, enabling optimal distribution of braking force.
Improvement of driving safety – Thanks to precise measurements, the ABS system increases vehicle stability during sudden braking.

The role of the sensor signal in the braking and stability control system

The signal from the ABS speed sensor is used to continuously assess whether any wheel is losing traction during braking or acceleration. This data is used not only by ABS and ESP systems but also by traction control systems and selected driving assistance functions. The reading must be stable and consistent with the other wheels, which is why the condition of the cable, the quality of the connector, and the absence of metal shavings or corrosion at the sensor face are important. When choosing a component such as an ABS sensor for Passat B7, it is worth comparing the OEM number, mounting side, and the number of pins in the plug.

Technical parameters and design differences of sensors

Depending on the vehicle model, the ABS speed sensor may differ in:

cable length (e.g., 60 cm – 120 cm),
resistance (typically 800–2000 Ω in inductive sensors),
plug type (2-pin or 3-pin),
mounting method (M6/M8 bolt or press-fit into the steering knuckle). Below is a summary of the basic sensor types: | Sensor type | Operating principle | Power supply | Application | |---|---|---|---| | Inductive (passive) | Generates AC voltage with ring rotation | Does not require power | Older models (e.g., cars up to approx. 2005) | | Magnetic / Hall (active) | Generates a digital signal | 5–12 V | Newer vehicles with ESP and ASR |

These differences are important when selecting parts – especially when considering compatibility with the ABS module and the stability control system.

Comparison of variants and data needed for selection

Comparison area	Passive sensor	Active sensor	What to check before purchase
Output signal	AC voltage dependent on RPM	Digital signal	Compatibility with ABS module and vehicle wiring
Power supply	No separate power required	Requires power	Number of pins, plug type, and cable routing
Mounting and fit	Dependent on knuckle and hub	Dependent on bearing, ring, and controller	OEM number, vehicle location, left or right side

Why is it worth taking care of the ABS speed sensor?

A malfunction of the ABS speed sensor can affect the operation of the ABS system and increase road risk. Typical symptoms of failure include:

ABS warning light illumination – Signals a problem with one or more sensors.
ABS not working during braking – May result from a damaged sensor or issues with its connections.
Vehicle diagnostic errors – The car's computer system may indicate faults related to the speed sensor. At Global Parts, you will find suitable used car parts that will help restore the proper operation of the ABS system.

Symptoms and error codes associated with the ABS sensor

In computer diagnostics, the ABS speed sensor often generates errors such as:

"no signal from wheel speed sensor",
"invalid speed signal",
"speed difference between axles". In practice, this means that the ABS controller has detected a signal discrepancy. Symptoms may appear at speeds as low as 15–20 km/h, as the system begins active data analysis above this value. It is worth remembering that the ABS speed sensor also has a direct impact on the operation of the following systems:
ESP (Electronic Stability Program),
ASR (traction control),
adaptive cruise control in some models.

The importance of the impulse ring and sensor cable

The impulse ring is a component that works with the sensor, designed to transmit information about wheel movement in the form of a variable field or pulses. Damage to the tone ring, contamination of the magnetic ring, or a broken cable can produce the same symptoms as a sensor failure. Therefore, during diagnostics, it is also worth checking Wires, cables, and connectors as well as the condition of the socket in the wheel arch. If you are looking for a component such as an ABS sensor for Audi A4 B7, you must also compare the wiring harness routing and the shape of the mounting at the steering knuckle.

How to choose the right ABS speed sensor?

When choosing an ABS speed sensor, pay attention to several key aspects:

Vehicle model fitment – Each ABS system has its specific technical requirements. At Global Parts, you will find ABS speed sensors perfectly matched to BMW, Audi, Mercedes, Volkswagen, Mini, and others.
Technical condition – Used sensors should be fully functional, free from mechanical and electrical damage.
Sensor type – Ensure that the selected sensor matches the ABS system in your vehicle (inductive or magnetic).

Sensor selection procedure – step by step

To ensure full fitment and compatibility of the ABS speed sensor:

Check the exact model, year, and engine version of the vehicle.
Determine whether the sensor is for the front or rear axle (left/right side).
Verify the sensor type (active or passive).
Compare the plug shape and cable length.
If necessary, compare with the impulse ring or wheel bearing. This approach minimizes the risk of incompatibility and facilitates installation without the need for system modifications.

Selecting a sensor based on car version and equipment

When selecting an ABS speed sensor, it is worth considering not only the car model but also the specific version of the braking system, body type, and equipment. Data such as brand, condition, OEM part number, interchangeable numbers, and vehicle location are helpful for products in this category. When completing a repair for a specific model, e.g., BMW E90, it is good to verify the mounting side, hub type, and compatibility with components such as ABS controllers or Brake calipers and brackets. The article Second-hand braking system: how to safely choose discs, calipers, and ABS? may serve as a supplement to these practical tips.

Why choose used ABS speed sensors?

Used car parts, such as the ABS speed sensor, are an economical solution that allows for savings while maintaining high quality. By choosing used ABS system components, you gain:

Lower costs – Used sensors are significantly cheaper than new ones but offer equally high quality.
Ecology – Recycling parts supports environmental protection and reduces waste.
Wide selection – In our store, you will find used ABS speed sensors for many car brands.

How to take care of the ABS speed sensor?

To ensure the ABS speed sensor works reliably for a long time, it is worth following a few rules:

Regular inspections – Check the condition of the sensor during periodic technical inspections of the braking system.
Keep it clean – Remove dirt and deposits from the sensor surface, which can interfere with its operation.
Replace damaged sensors on time – Lack of a functional sensor can reduce the effectiveness of the ABS system. Replacing or checking the sensor early helps maintain the proper operation of the braking system and stability control systems.

FAQ

Question	Answer
What is the construction and purpose of an ABS speed sensor?	The ABS speed sensor is an electronic component mounted at the wheel, hub, or steering knuckle that reads the wheel's rotational speed. A typical sensor consists of a sensor housing, a measuring tip, a cable or socket, and a plug matched to the car's installation. Its task is to transmit a signal to the ABS controller, which then controls the operation of the braking system.
What is the ABS speed sensor used for?	The ABS speed sensor is used to monitor the rotation of each wheel during driving and braking. Based on this data, the controller recognizes the moment of traction loss and can appropriately control braking pressure. Without a proper signal, not only ABS functions but also selected stability assistance systems may stop working.
What is the construction and function of an impulse ring?	The impulse ring is a component that works with the ABS sensor, located at the hub or integrated with the wheel bearing. Its task is to create a reference signal that the sensor reads as wheel rotation. Depending on the design, it can take the form of a toothed ring or a magnetic ring, so the sensor type and the solution used by the manufacturer must be taken into account during selection.
How to choose the right ABS speed sensor for a car?	It is best to compare the OEM number, vehicle location, mounting side, and plug type. You also need to check whether a front or rear sensor is needed and whether the installation uses an active or passive version. In many cases, comparing interchangeable numbers is also helpful.
What symptoms indicate a problem with the ABS sensor?	Most often, an ABS warning light appears, errors are saved in the controller, or unstable readings from one wheel occur during diagnostics. Sometimes, the ABS may fail during hard braking, or ESP and traction control may malfunction. Similar symptoms can also be caused by a damaged cable, connector, or impulse ring.
What should be paid attention to when installing an ABS speed sensor?	It is important to clean the mounting area, check the condition of the socket, and correctly route the cable in the factory brackets. You should also ensure that the sensor works with the correct ring and has no play in the mounting. After installation, it is worth checking for errors in the controller and reading the speed of each wheel.

Summary: ABS speed sensor in the Global Parts automotive store

The ABS speed sensor is an important element of the braking system, responsible for transmitting data necessary for the operation of ABS, ESP, and other safety-enhancing systems. In the Global Parts offer, you will find used parts matched to vehicles of brands such as Mercedes, Unbranded, BMW, and others, taking into account the data needed for proper fitment, such as OEM number, interchangeable numbers, or mounting location. We invite you to contact us – we are here to help you! For more information and interesting facts, we also invite you to visit our automotive blog.

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