Car electrical relays
More informationAt Global Parts, we offer a wide selection of original used car parts, including relays for many popular car brands such as BMW, Mini, Mercedes, Audi, Volkswagen, and others. The relays we offer undergo quality control to ensure you receive a top-quality product.
GB
Make
Category
Subcategory
Condition
In Stock
Price
Part no. A0025422619-1
Relay Mercedes W203 W204 W212 W639 W906 4-Pin Grey Hella 12V A0025422619
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0025428719
Mercedes W176 W204 W207 W166 Relay 4 Pin Grey Hella A0025428719
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0035422819
Battery Relay Mercedes W176 W246 W447 Cut Off Module Control Unit A0035422819
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0025422519
Mercedes W168 W169 W245 Blue Relay 4-Pin Tyco A0025422519
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0025428919
Relay Mercedes W176 W246 5-Pin Yellow Hella 12V A0025428919
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0025422619-2
Mercedes ML W163 Relay 4-Pin Grey Tyco Set Kit A0025422619
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0025421119
Mercedes W163 W168 W203 W211 Relay 4-Pin Black Hella A0025421119
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0009822923
Mercedes W177 W205 W247 Relay Fuse Unit Module 4 Pins Grey A0009822923
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0025428819
Mercedes W176 W246 Relay Current 4 Pin 12V Hella A0025428819
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0009821923
Mercedes W205 Interior Trunk Fuse Box Automotive Pink Relay A0009821923 Red
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0025427219
Mercedes W169 W245 W204 W212 Relay 4-Pin Black Hella A0025427219
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0025422619-3
Relay Mercedes W203 W204 W212 W639 W906 4-Pin Grey Hella 12V A0025422619
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0035420819
Mercedes W176 W205 W213 W242 W447 W907 Relay 4-Pin Black Tyco Unit A0035420819
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0035422319
Mercedes W176 W246 Relay Battery Decoupling 12V A0035422319
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0025421419-1
Relay Mercedes W163 W169 W203 W210 Relay Unit 5-Pin Yellow Tyco A0025421419
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0025421219-1
Mercedes W168 W203 W211 W218 Relay Unit 5-Pin Yellow Hella A0025421219
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0025421419
Mercedes W163 W169 W203 W210 Relay 5-Pin Yellow TYCO A0025421419
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0035420219
Relay Mercedes W639 W906 5-Pin Black 12A A0035420219
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0019820823
Mercedes Sprinter W907 4-Pin Relay V23074-H1605-X123 A0019820823
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0025428019
Relay Mercedes W176 W246 4-Pin Black Hella 12V A0025428019
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0035421619-1
Mercedes W177 Relay 052 Fuse Box Relay Slot B D E 70A Tyco SET X2 A0035421619
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0035423019
Power Relay Control Mercedes W176 W246 Module 4 Pin 12V 20A A0035423019
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0035420219-1
Relay Mercedes W639 W906 5-Pin Black 12V 20A A0035420219 Set X2
£18.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0009821923-1
Mercedes W205 Interior Trunk Fuse Box Automotive Pink Relays Set A0009821923
£23.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0009828323-1
Mercedes W176 W246 Power Relay Control Module 5 Pin 12V A0009828323 Set X2
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0009820123
Relay Mercedes W166 Voltage Dip Protection Start/Stop Relay Module A0009820123
£161.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0025421219
Mercedes W168 W203 W211 Relay 6-Pin Black Tyco A0025421219
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0025421119-1
Relay Unit Mercedes W163 W168 W203 W211 4-Pin Black Hella A0025421119 Set 2x
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0035420419
Mercedes W177 W205 W247 Relay Fuse Unit Module 4 Pins Black A0035420419
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A2469052602
Dashboard Panel Mercedes W176 W246 Switch Dynamic Select Start/Stop A2469057902
£28.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0025428419
Relay Mercedes W176 W246 4-Pin Black Hella 12V A0025428419
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0005459812
Mercedes Vito W447 W213 OM654 Power Distribution Relay Unit Module A0005459812
£23.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0035421019-1
Mercedes C117 GLA X156 ML W166 W176 W246 Relay 5 Pins Yellow Set A0035421019
£18.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0035421619
Mercedes W177 Relay 052 Engine Fuse Box Relay Slot B D E 70A Tyco A0035421619
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0035420219-3
Mercedes W639 W906 Relay 5-Pin Control Unit 12A Blue A0035420219
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0009822523
Mercedes W156 W242 W246 W447 Relay 4-Pin Black Hella A0009822523
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0009827723-1
Mercedes W176 W204 W246 Fuse Relay 4-Pin Unit Black Hella SET X2 A0009827723
£23.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0009828523
Mercedes W164 Suspension Compressor Relay A0009828523
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0035423019-1
Power Relay Control Mercedes W176 W246 Module 4 Pin 12V 20A A0035423019 SET
£23.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0009825323
Mercedes GLC X253 Relay Battery Control Cut Off Out Relay A0009825323
£47.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0035421019
Relay Mercedes C117 GLA X156 ML W166 W176 W246 5 Pins Yellow A0035421019
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A4709820700
Mercedes W470 Glow Plug Relay Module Unit A4709820700
£23.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0025426619
Mercedes C215 C216 W220 W221 R230 Relay Tyco Unit Module A0025426619
£18.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0009828023
Fuse Relay Mercedes C117 W166 W176 W205 X253 Black 4 Pin 12V A0009828023
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0035455005
Mercedes W202 W210 Kick Down Kickdown Relay Electrical Module Unit A0035455005
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0035420219-2
Mercedes W639 W906 Relay 5-Pin Control Unit 12A Blue SET X2 A0035420219
£18.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0025428719-1
Mercedes W176 W204 W207 W166 Relay 4 Pin Grey Hella SET X2 A0025428719
£23.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0025428919-1
Mercedes W176 W246 Relay 5-Pin Yellow Hella 12V SET X2 A0025428919
£23.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0025421119-2
Mercedes W163 W168 W203 W211 Relay Unit 4-Pin Black Set X2 A0025421119
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0025429319
Mercedes C117 W166 W176 W205 X253 Relay Black Control Unit 4 Pin 12V A0025429319
£18.95
Free delivery: Mar 19
If paid before 14:00
Part no. A0009827723
Fuse Relay Mercedes W176 W204 W246 4-Pin Unit Black Hella A0009827723
£13.95
Free delivery: Mar 19
If paid before 14:00
Part no. 8200308271
Fuse Pink Mercedes W415 Citroen Renault Kangoo Trafic Relay 4-Pin 8200308271
Product currently unavailable
Part no. A0025428319
Mercedes W176 W204 C207 W212 C218 W246 Relay 4-Pin Black Hella 12V A0025428319
Product currently unavailable
Part no. A0025427619
Mercedes-Benz SLS ML G C197 W164 W463 Relay Fuse 5-Pin Green Hella A0025427619
Product currently unavailable
Part no. A0009828223-1
Mercedes W213 Power Relay 4 Pin 12V Hella A0009828223 SET x2
Product currently unavailable
Part no. A0025426419
Battery Relay Mercedes W211 CLS W219 Module Control Unit 12V A0025426419
Product currently unavailable
Part no. A0035421919
Mercedes Vito W639 Coolant Radiator Fan Relay Control Module A0035421919
Product currently unavailable
Part no. N000000006984
Mercedes Vito W447 Battery Crash Disconnection Control Relay N000000006984
Product currently unavailable
Part no. A0285454032
Mercedes W203 W210 W220 DIesel Glow Plug Relay Module Unit A0285454032
Product currently unavailable
Part no. A2115404245
Mercedes W211 Battery Load Control Module Relay A2115404245
Product currently unavailable
Part no. A0009828223
Mercedes W213 Power Relay 4 Pin 12V Hella A0009828223
Product currently unavailable
Part no. A0025424419
Mercedes Vito W639 Coolant Radiator Fan Relay Control Module A0025424419
Product currently unavailable
Part no. A9079060100
Mercedes Sprinter W907 Battery Power Distributor Current Limiter A9079060100
Product currently unavailable
Part no. A6549001300
Glow Plug Relay Mercedes W213 C238 Diesel OM654 Preglow Module A6549001300
Product currently unavailable
Part no. A0045452905
Mercedes Relay Fuse Unit Module 4 Pins Grey A0045452905
Product currently unavailable
Part no. A0025427419
Mercedes-Benz A B E M W169 W245 W210 W163 Relay 5-Pin Yellow Hella A0025427419
Product currently unavailable
Part no. A0025428819-1
Mercedes W176 W246 Relay Current 4 Pin 12V Hella A0025428819 Set x2
Product currently unavailable
Part no. A622900130
Mercedes W447 Glow Plug Relay A622900130
Product currently unavailable
Part no. A0009822923-1
Mercedes W177 W205 W247 Relay Fuse Unit Module 4 Pins Grey SET X2 A0009822923
Product currently unavailable
Part no. A0009001108
Mercedes W205 Hybrid Battery Charging Control Unit A0009001108
Product currently unavailable
Part no. A6461536579
Mercedes-Benz W203 W210 Sprinter W906 Glow Plug Relay A6461536579
Product currently unavailable
Part no. A7899823000
Mercedes EQA H243 Relay High Voltage Performance DC 250 A Contactor A7899823000
Product currently unavailable
Part no. A0025424419-1
Mercedes Vito W639 Coolant Radiator Fan Relay Control Module A0025424419
Product currently unavailable
Part no. A0025428019-3
Relay Mercedes W176 W246 4-Pin Black Hella 12V Electrical A0025428019 Set x4
Product currently unavailable
Part no. A0005461366
Mercedes W203 W209 Relay Unit Module 2 Pins White Hella A0005461366
Product currently unavailable
Part no. A2055406911
Mercedes W205 Engine Fuse Box Module Panel Bracket A2055406911
Product currently unavailable
Part no. A0035422019
Relay Mercedes SLK R171 5-Pin Electrical Plug White 12V A0035422019 R1808002
Product currently unavailable
Part no. A7899823500
Mercedes EQA H243 Engine Relay 20A ECU A7899823500
Product currently unavailable
Part no. A6511530879
Mercedes W906 OM651 Glow Plug Pre Heat Relay A6511530879
Product currently unavailable
Part no. A1695458140
Mercedes W169 W245 Relay Control Unit Bracket Mount Holder Cover A1695458140
Product currently unavailable
Part no. A0045450405
Mercedes W169 W203 W639 W906 Relay 5-Pins Green Control Unit 12V A0045450405
Product currently unavailable
Part no. a0025429219
Mercedes C117 W166 W176 W222 W246 Relay Black Control Unit 12V 20A A0025429219
Product currently unavailable
Part no. A0009828123
Mercedes W906 Starter Terminal Relay 12V A0009828123
Product currently unavailable
Part no. A1408207126
Mercedes C140 Blinker Hazard Trailer Relay Module Control Unit A1408207126
Product currently unavailable
Part no. A0015426519
Mercedes C140 Brake Pump Relay Electrical Fuse Module Control Unit A0015426519
Product currently unavailable
Part no. A0255455932
Mercedes-Benz C CLK Class W202 W208 Module Control Unit Fan ECU A0255455932
Product currently unavailable
Part no. A0025421519
Mercedes-Benz M-Class ML W163 Relay 4-Pin Black Hella A0025421519
Product currently unavailable
Part no. A1265420332
Relay Mercedes W124 E280 Fuse Box Light Control Relay A1265420332
Product currently unavailable
Part no. A2018210047
Relay Mercedes W124 Indicators Wipers Hazard Lights Relay A2018210047
Product currently unavailable
Part no. A2015403245
Relay Mercedes E200 S124 Petrol M111 Overload Protection Relay A2015403245
Product currently unavailable
Part no. A0009828323
Mercedes W176 W246 Power Relay Control Module 5 Pin 12V A0009828323
Product currently unavailable
Part no. A0035452405
Relay Mercedes W124 E280 Petrol Fuel Pump Cut Off Relay A0035452405
Product currently unavailable
Part no. A0015429619
Mercedes R129 W202 Relay Green Control Unit 12V 30A A0045450405
Product currently unavailable
Part no. A6519007703
Mercedes W906 Glow Plug Relay Module Unit A6519007703
Product currently unavailable
Electrical relays for stable vehicle electrical system performance
Stable and reliable relays for the car's electrical system
Relays are key components of a vehicle's electrical system, controlling the flow of current to various electrical devices, such as lights, fans, fuel pumps, and air conditioning systems. Relays allow for the control of high electrical loads using low-voltage signals, ensuring the smooth operation of vehicle systems. At Global Parts, you'll find a wide selection of used car parts, including relays, perfectly matched to brands like BMW, Audi , Mercedes, Volkswagen, Mini, and more .
What is an electrical relay and how does it work in practice?
An electrical relay is an electromechanical or solid-state control element that acts as a switch activated by a low-current signal. In the classic 12V automotive design, it consists of an electromagnetic coil, a core, a movable contact (armature), and a set of operating contacts (NO – normally open or NC – normally closed). When a control voltage (usually 12V) is applied, the coil generates a magnetic field that closes or opens the power circuit. In practice, this means the ability to control devices drawing 20A, 30A, or even 70A using a signal with a load of 0.1–0.2A. This represents a significant saving for the control system and components such as switches, comfort modules, and ECUs. In modern vehicles, relays work with BCM modules and CAN systems, ensuring precise adjustment of the operating parameters of the entire system.
What functions do relays perform?
Relays play a key role in many vehicle electrical systems:
- High Load Switching – Controls high-power electrical devices, minimizing the risk of system overload.
- Electrical System Protection – Reduces load on control circuits, protecting against surges and overloads.
- Remote control – Allows devices to be turned on and off using control signals.
- Optimizing system performance – Relays ensure electrical systems operate efficiently and without disruptions.
Types of relays and their technical parameters
There are several basic types of relays used in automotive installations:
| Relay type | Characteristic | Typical parameters | Application |
|---|---|---|---|
| Electromechanical | Classic design with mechanical contacts and an electromagnetic coil | 12V / 24V, 20–70A | Fuel pump, radiator fan, heater |
| Mini / Micro ISO | Compact housing compliant with ISO standards | 12V, 20–30A | Low beam, horn, module control |
| Time relay | Switching on with time delay (adjustable) | 12V, adjustable 1–30 sec. | Interior lighting, heated windows |
| Solid State Relay (SSR) | No mechanical components, quick switching | 12V, high switching frequency | Electronic systems, ECU controllers |
The most common contact markings are: 30 (power supply), 85 and 86 (coil), 87 (NO contact), 87a (NC contact). Relay matching should take into account voltage compatibility (12V in passenger cars, 24V in trucks), maximum operating current and contact configuration.
Why is it worth taking care of relays ?
A faulty relay can lead to problems with the operation of electrical devices and reduce the reliability of the vehicle's electrical system. Typical symptoms include:
- Electrical devices not responding – Lights, fans or fuel pumps do not work despite components being functional.
- Erratic operation – Devices turn on and off randomly.
- No control signal – A damaged relay does not transmit current to the controlled device.
- Relay overheating – May indicate overload or internal damage. If you need a replacement, you'll find the right used car parts at Global Parts that will restore full functionality to your electrical system.
Symptoms and relationships with other installation elements
In practice, an electrical relay interacts directly with fuses, control modules, temperature sensors, and the wiring harness. For example, the fuel pump relay in many BMW and Volkswagen models only activates after receiving a signal from the crankshaft position sensor. In the case of the radiator fan, the relay responds to a signal from the coolant temperature sensor (usually at 92–105°C). Correctly matching parameters (e.g., 40A instead of 30A in the fan circuit) ensures stable operation, optimizes current flow, and reduces voltage drops. This is also important when upgrading LED lighting or installing additional accessories, where load compatibility is crucial.
How to choose the right relays ?
When selecting relays, there are several key aspects to consider:
- Vehicle-specific fit – Every electrical system has its own specific technical requirements. At Global Parts, you'll find relays perfectly matched to BMW, Audi, Mercedes, Volkswagen, Mini, and more .
- Electrical Parameters – Check operating voltage, maximum current and control circuit specifications.
- Technical condition – Used relays should be fully functional and free from signs of overheating or mechanical damage.
Step-by-step relay matching procedure
- Check the installation voltage (usually 12V).
- Verify the maximum current of the device (e.g. radiator fan 25-40A).
- Specify the contact configuration (NO/NC).
- Adjust the case size (Mini ISO, Micro ISO).
- Compare pin designations (30/85/86/87). This approach allows for full compatibility with the electrical system and ensures correct installation without the need to modify the wiring harness.
Why choose used relays ?
Used car parts, such as used relays, are an economical solution that allows you to save money while maintaining high quality. By choosing used electrical components, you benefit from:
- Lower costs – Used relays are much cheaper than new ones, but offer just as high quality.
- Ecology – Recycling parts supports environmental protection and reduces waste.
- A wide range of products – In our store you will find used relays to the most popular car brands.
How to take care of relays ?
To ensure that the relays function reliably for a long time, it is worth following a few rules:
- Regular inspection – Check the condition of relays during technical inspections.
- Clean connections – Keep connectors and wires in good condition to avoid interruptions in current flow.
- Avoid overloads – Use relays with appropriate parameters for the given electrical system.
- Replace on time – Damaged or worn relays should be replaced to prevent problems with the operation of electrical equipment. If you need a replacement, Global Parts has the right used car parts to ensure the reliability and durability of your electrical system.
FAQ - Frequently asked questions about electrical relays
| Question | Answer |
|---|---|
| What is an electrical relay? | It is a control element that allows you to turn on high-power devices using a low-voltage signal, usually 12V. |
| How does a relay work in a car? | When voltage is applied to the coil, a magnetic field is created that closes the contacts and allows current to flow to a device, such as a fuel pump. |
| What are typical relay parameters? | Most often 12V and a load capacity of 20A, 30A, 40A or 70A depending on the application. |
| Does the relay affect the operation of the LED lights? | Yes, proper relay matching improves voltage stability and eliminates lighting interference. |
| How to check relay compatibility? | The voltage, operating current and pin configuration must be matched to the specific car model. |
| Does the relay work with the fuse? | Yes, the fuse protects the circuit from overload and the relay controls the current flow. |
Summary: Relays at Global Parts Automotive Store
Relays are essential components of the electrical system that control the operation of many devices in your vehicle. By maintaining their technical condition, you can ensure the reliability of your electrical system and the safety of your vehicle. The Global Parts automotive store invites you to browse our wide selection of original used car parts . Whether you're looking for car parts for BMW , Audi , Volkswagen , Mercedes, Mini , and more, you'll find them at competitive prices. We strive to ensure every customer finds the right parts for their car, and if you have any questions or concerns about selecting the right components, we're happy to help! Please contact us – we're here to help! For more information and interesting facts, visit our automotive blog .