What is the construction and purpose of differentials?

Differentials are drivetrain components mounted on the drive axle or in the axle housing. They usually consist of a housing, final drive, spider gears, side gears, bearings, and seals. Their task is to distribute torque between the wheels of one axle and allow for a difference in rotational speed while turning.

What are differentials used for?

Differentials are used for smooth power transfer to the wheels while maintaining car stability in corners. Thanks to them, the inner and outer wheels of the drive axle can rotate at different speeds without jerking the drivetrain. Failure of this assembly can cause noise, overload the half-shafts, and impair vehicle handling.

What is the construction and function of differential bearings?

Differential bearing is a system of bearings supporting the pinion shaft and the differential carrier. It serves to maintain the proper position of gear elements, limit backlash, and ensure uniform gear operation. Its condition affects noise levels, gear durability, and the tightness of the entire assembly.

How to choose a differential for a specific car version?

When choosing, it is best to compare the OEM part number, interchangeable numbers, gear ratio, and vehicle placement. It is also worth checking the fuel type, body version, drive type, and compatibility with half-shafts and the driveshaft. If the car was available in several equipment variants, verification by VIN will also be helpful.

What symptoms may indicate differential wear?

Most commonly, these are whining or humming sounds that increase with speed, jerking when changing loads, and noticeable play in the drivetrain. Symptoms also include oil leaks from the housing and uneven operation during turns. Such signals should be compared with the condition of bearings, seals, and mounts.

What does the installation and maintenance of a differential look like?

Installation involves removing the driveshaft, disconnecting the half-shafts, replacing the assembly, and resetting all connections according to the manufacturer's documentation. After installation, check for leaks, mount condition, and the correct oil specified for the given design. In operation, regular checks for leaks, noise, and play appearing during driving are important.

Differentials - Differentials

Our offer includes original used differentials, commonly known as differentials, as well as remanufactured differentials from brands such as BMW, Mercedes, Audi, Volkswagen, Mini, and others. Thanks to our collaboration with experienced automotive consultants with over 10 years of experience, we can help you choose the right differential for your vehicle.

More information

Make

BMW E87 E90 E91 116i 118i 318i 320i Differential Diff 3,91 Ratio RECONDITIONED

£588.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 7524319-1

BMW E87 E90 Rear Differential Diff 3,38 Ratio 7524319 RECONDITIONED

£617.95

Free delivery: Jul 14

If paid before 14:00

Part no. 7524323-1

BMW E87 LCI 120i N43 Rear Differential Diff 3,73 Ratio 7524323 RECONDITIONED

£617.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 7601768

BMW X1 E84 E90 E91 E92 Front Differential Diff 3,46 Ratio 7601767 WARRANTY

£807.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 7524317-1

BMW 1 3 Series E87 E90 118i 318i N46 Differential Diff 3,23 Ratio RECONDITIONED

£617.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 7591998

BMW X3 F25 X4 F26 F07 F10 F11 F20 F21 F34 Front Differential Diff 3,08 WARRANTY

£664.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 7578157

BMW F01 F07 F30 330dX 530dX Front Differential Diff 2,56 Ratio 7578157 WARRANTY

£142.95

Free delivery: Jul 14

If paid before 14:00

Part no. 7508521

BMW X5 Series E53 4.4i M62 Front Differential Diff 3,64 Ratio 7508521 WARRANTY

£246.95

Free delivery: Jul 14

If paid before 14:00

Part no. 7591996

BMW X3 F25 30dX 35dX F10 M550dX F20 M140iX Front Differential Diff 2,81 WARRANTY

£308.95

Free delivery: Jul 14

If paid before 14:00

Part no. 7592002

BMW X3 F25 X4 F26 Front Differential Diff 3,73 7592001 Manual Gearbox WARRANTY

£427.95

Free delivery: Jul 14

If paid before 14:00

Part no. 7584446

BMW F01 F07 F10 F11 LCI Rear Differential Diff 3,46 Ratio 7584446 WARRANTY

£322.95

Free delivery: Jul 14

If paid before 14:00

Part no. 7599475

BMW F22 F23 F30 F31 F32 F36 Rear Differential Diff 3,23 Ratio 7599475 WARRANTY

£161.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 7590912

BMW X5 E70 30dX 35iX Rear Differential Diff 3,15 Ratio 7590911 7630912 WARRANTY

£569.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 2283320

BMW E90 E92 E93 M3 S65 Rear Differential Diff 3,15 Ratio 2283320 WARRANTY

£1,377.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 8090464

BMW F80 M3 F82 F83 M4 F87 M2 Rear Differential Diff 3,46 Ratio 2289970 WARRANTY

£1,377.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 7531797

BMW X3 Series E83 2.0i N46 Front Differential Diff 4,10 Ratio 7531797 WARRANTY

£569.95

Free delivery: Jul 14

If paid before 14:00

Part no. 7630821

BMW F01 F07 F10 530d 730d Rear Differential Diff 2,56 Ratio 7578151 WARRANTY

£208.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 7516882

BMW 5 Series E60 530i M54 Rear Differential Diff 3,46 Ratio 7516881 WARRANTY

£237.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 7648879

BMW 3 4 Series F30 F31 F32 Front Differential 330D 335D 2.56 Ratio 7648879

£284.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 7578153

BMW F25 F26 F30 F31 F32 xDrive Front Differential Diff 3,38 7578153 WARRANTY

£446.95

Free delivery: Jul 14

If paid before 14:00

Part no. 7578150-1

BMW F10 F11 Rear Differential Diff 3,38 Ratio 4598071 7578149 WARRANTY

£522.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 7527096

BMW E60 520i M54 Rear Axle Differential Diff 3,38 Ratio 7527096 WARRANTY

£284.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 7545611-1

BMW E46 330xi E83 Front Differential Diff Drive 3,07 Ratio 7553908 WARRANTY

£208.95

Free delivery: Jul 14

If paid before 14:00

Part no. 7592987

BMW X1 E84 Rear Differential Diff Final Drive 3,91 Ratio 7592987 WARRANTY

£474.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 7566171

BMW E90 E91 E92 325i N53 Rear Differential Diff 3,07 7566171 Manual WARRANTY

£398.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 8487445

BMW X3 G01 X4 G02 X5 G04 X6 G06 Front Differential Diff 3.385 8487445 WARRANTY

£427.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 8881536

BMW F70 F74 F78 M235iX B48R Rear Axle Differential Diff 8881536 WARRANTY

£484.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 7560599-1

BMW E60 E61 525i N52 Rear Differential Diff 3,38 Ratio 7528326 RECONDITIONED

£664.95

Free delivery: Jul 14

If paid before 14:00

Part no. 9896285

BMW G20 G30 G32 LCI xDrive Front Differential Diff 2,56 Ratio 9896285 WARRANTY

£446.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 8679979

BMW X3 G01 X4 G02 Front Axle Differential Diff Ratio 3,23 8679979 WARRANTY

£313.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 7643218

BMW i3 I01 Differential Diff Sound Insulation Acoustic Cover Right O/S 7643218

£13.95

Free delivery: Jul 14

If paid before 14:00

Part no. 7590629

BMW X3 F25 18d Rear Axle Differential Diff Ratio 3.46 7590629 WARRANTY

£303.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 7636996

BMW X5 F15 X6 F16 Rear Axle Differential Diff I=3,15 7636996 WARRANTY

£427.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 8679977

BMW X3 G01 X4 G02 Front Axle Differential Diff 2,81 Ratio 8679977 WARRANTY

£455.95

Free delivery: Jul 14

If paid before 14:00

Part no. 7615390

BMW X1 E84 18dX 20dX N47N Rear Axle Differential Diff 2,93 7615390 WARRANTY

£332.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 7601768-2

BMW X1 E84 Front Differential Flange Shaft Part Diff 3,46 Ratio 7601767

£142.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 7630832

BMW F01 F10 F12 F13 550i 650i 740d Rear Differential 3.08 Ratio 7630832 WARRANTY

£446.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 8655015

BMW X3 G01 X4 G02 20iX Rear Axle Differential Diff I = 3.38 8655015 WARRANTY

£617.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 7599397

BMW X1 E84 20iX 28iX N20 Rear Axle Differential Diff 3,38 7599396 WARRANTY

£569.95

Free delivery: Jul 15 – 22

If paid before 14:00

Part no. 7571176

BMW E90 E91 E92 335d M57N2 Rear Differential Diff 2,81 7571175 4552330 WARRANTY

Product currently unavailable

Part no. 7524325

BMW E87 E90 E91 116i 118i 318i 320i Differential Diff 3,91 Ratio WARRANTY

Product currently unavailable

Part no. 7542222

BMW X3 E83 2.0d M47N2 Rear Differential Diff 3,07 Ratio 7542222 7535119 WARRANTY

Product currently unavailable

Part no. 7598855

BMW E87 E90 E91 318d 120d Rear Differential Diff 3,07 Ratio 7598855 WARRANTY

Product currently unavailable

Part no. 7529108

BMW 3 Series E90 E91 325i Rear Differential Diff 3,23 7529108 7566183 WARRANTY

Product currently unavailable

Part no. 7552523

BMW X5 E70 3.0d 3.0sd M57N2 Rear Differential Diff 3,64 Ratio 7552523 WARRANTY

Product currently unavailable

Part no. 7555315-1

BMW E81 E87 LCI E90 Rear Differential Diff 4,10 Ratio 7555315 RECONDITIONED

Product currently unavailable

Part no. 7519941

BMW E90 E91 E92 325i N52 N52N Rear Differential Diff 3,73 Ratio 7519941 WARRANTY

Product currently unavailable

Part no. 7526931

BMW 5 Series E60 530d M57N Rear Differential Diff 2,47 Ratio 7526931 WARRANTY

Product currently unavailable

Part no. 7545611

BMW 3 X3 Series E46 E83 Front Differential Diff 3,07 Ratio Final Drive WARRANTY

Product currently unavailable

Part no. 7549000

BMW X3 E83 Front Differential Diff 3,91 Ratio Drive 7549000 7523650 WARRANTY

Product currently unavailable

Part no. 7583774

BMW X1 E84 18dX 20dX Front Differential Diff 2,79 Ratio 7583773 Manual WARRANTY

Product currently unavailable

Part no. 7512914

BMW X5 Series E53 3.0i 4.4i Front Differential Diff 4,10 Ratio WARRANTY

Product currently unavailable

Part no. 7527756

BMW E90 330d M57N2 Rear Differential Diff 2,81 7527756 7571178 4552329 WARRANTY

Product currently unavailable

Part no. 7605591

BMW F20 F21 F30 F31 Rear Differential Diff 3,08 Ratio 7605591 7605592 WARRANTY

Product currently unavailable

Part no. 7591073

BMW E81 E87 123d E90 LCI 320d Rear Differential Diff 3,15 Ratio 7591073 WARRANTY

Product currently unavailable

Part no. 7529108-1

BMW E90 E91 E92 325i Rear Differential Diff 3,23 7529108 7566183 RECONDITIONED

Product currently unavailable

Part no. 7584451

BMW F10 F11 Rear Axle Differential Diff Final Drive 7584450 2,93 Ratio WARRANTY

Product currently unavailable

Part no. 7512663

BMW X5 E53 3.0d 4.6is Rear Differential Diff 3,91 Ratio 7524892 7512663 WARRANTY

Product currently unavailable

Part no. 7592939

BMW X1 E84 18dX 20dX N47 Rear Differential Diff 2.79 Ratio 7592938 WARRANTY

Product currently unavailable

Part no. 7566151

BMW 3 Series E90 E91 E92 335i N54 Differential Diff 3,46 Ratio WARRANTY

Product currently unavailable

Part no. 7592006

BMW X3 F25 X4 F26 Rear Differential Diff Axle Drive 3,08 Ratio 7592005 WARRANTY

Product currently unavailable

Part no. 7544874

BMW F30 F31 F32 F33 F34 F36 Rear Differential Diff 2,56 Ratio 7544873 WARRANTY

Product currently unavailable

Part no. 7599411

BMW F20 F21 M135i F22 M235i N55 Rear Differential Diff 3,08 7599411 WARRANTY

Product currently unavailable

Part no. 7566182

BMW E87 130i N52 E84 18d 20dx N47 Rear Differential Diff 3,46 Ratio WARRANTY

Product currently unavailable

Part no. 7510656

BMW X5 E53 3.0i M54 Rear Differential Diff 4,10 Ratio 7510655 7524888 WARRANTY

Product currently unavailable

Part no. 7572804

BMW E81 E87 E90 E91 E92 Rear Differential Diff 3,15 Ratio 7572804 WARRANTY

Product currently unavailable

Part no. 7624780

BMW 3 Series F30 F31F34 LCI Rear Differential Diff 7624780 2,93 Ratio WARRANTY

Product currently unavailable

Part no. 7552523-1

BMW X5 E70 3.0d 3.0sd M57N2 Rear Differential Diff 3,

Product currently unavailable

Part no. 7534577

BMW X5 E53 Rear Axle Differential Diff 4,10 Ratio 7534576 WARRANTY

Product currently unavailable

Part no. 7572800

BMW E81 E87 E90 LCI 118d 318d N47 Rear Differential Diff 3,23 Ratio WARRANTY

Product currently unavailable

Part no. 7630828

BMW F01 F06 F07 F10 F11 F12 Rear Differential Diff 2,81 Ratio 7630828 WARRANTY

Product currently unavailable

Part no. 7605588

BMW 1 Series F20 F21 116d ed Rear Differential Diff 2,93 Ratio 7605587 WARRANTY

Product currently unavailable

Part no. 7544581

BMW 5 Series E60 E61 Rear Differential Diff 2.64 Ratio 7544581 7560587 WARRANTY

Product currently unavailable

Part no. 7523668

BMW X3 E83 3.0i M54 Rear Differential Diff 3,64 Ratio 7523668 WARRANTY

Product currently unavailable

Part no. 7500799

BMW X3 E83 3.0d E46 325xi 330xi Front Differential Diff 3,46 7546112 WARRANTY

Product currently unavailable

Part no. 7514198

BMW Z4 E85 2.5i 3.0si Rear Axle Differential Diff 3,64 Ratio 7514197 WARRANTY

Product currently unavailable

Part no. 7566221

BMW 3 Series E90 E91 E92 325i N53 Differential Diff 3,46 Ratio 7566221 WARRANTY

Product currently unavailable

Part no. 7614714

BMW X1 E84 18dX 20dX N47 N47N Rear Differential Diff 3,46 Ratio 7614713 WARRANTY

Product currently unavailable

Part no. 7514149

BMW Z4 E85 2.5i M54 Roadster Rear Differential Diff 3,23 7514149 WARRANTY

Product currently unavailable

Part no. 7572651

BMW X1 E84 18dX 20dX E90 E91 330xd Front Differential Diff 2,92 7572651 WARRANTY

Product currently unavailable

Part no. 7572054

BMW E90 E91 E92 335i N54 Rear Differential Diff 3,46 Ratio 7572054 WARRANTY

Product currently unavailable

Part no. 7566179-1

BMW 3 E90 325i N52 Differential Diff 3,73 Ratio 7566179 7519941 RECONDITIONED

Product currently unavailable

Part no. 9470035

BMW F40 X1 F48 X2 F39 Rear Differential Diff Axle Drive 1,74 WARRANTY

Product currently unavailable

Part no. 7605593

BMW F20 F21 125d N47S1 Rear Differential Diff 2,65 Ratio 7605593 WARRANTY

Product currently unavailable

Part no. 7510653

BMW X5 E53 4.4i M62 Rear Differential Diff 3.64 Ratio 7510653 7510654 WARRANTY

Product currently unavailable

Part no. 7521661

BMW E60 530d M57N M57N2 Rear Differential Diff 2,47 Ratio 7521661 WARRANTY

Product currently unavailable

Part no. 7567991

BMW X3 E83 LCI 2.5si 3.0i N52N Rear Differential Diff 3,91 7567991 WARRANTY

Product currently unavailable

Part no. 7592010

BMW X3 F25 X4 F26 Rear Differential Diff Axle 3,73 Ratio 7592009 Manual WARRANTY

Product currently unavailable

Part no. 2282480

Rear Differential BMW E46 M3 S54 Diff Final Drive 3,62 Ratio 2282480 WARRANTY

Product currently unavailable

Part no. 7562711

BMW 5 Series E60 LCI 520d N47 Rear Differential Diff 2,56 Ratio 7562711 WARRANTY

Product currently unavailable

Part no. 7601206

BMW X3 E83 LCI 1.8d N47 Rear Differential Diff 2,93 Ratio 7601206 WARRANTY

Product currently unavailable

Part no. 7589481

BMW F21 F30 F31 F32 F33 F34 Rear Differential Diff 3,38 Ratio 7589481 WARRANTY

Product currently unavailable

Part no. 7584444

BMW F10 F11 F12 F13 F07 GT Rear Differential Diff 3,23 Ratio 7584444 WARRANTY

Product currently unavailable

Part no. 7584448

BMW F01 LCI F07 GT F10 F11 Rear Differential Diff 3,08 Ratio 7584448 WARRANTY

Product currently unavailable

Part no. 7514129

BMW Z4 E85 3.0i M54 Rear Differential Diff 3,07 Ratio 7514128 7514129 WARRANTY

Product currently unavailable

Part no. 7547093

BMW E61 530d M57N2 Rear Axle Differential Diff 2,47 Ratio 7547092 WARRANTY

Product currently unavailable

Part no. 7544795

BMW X3 E83 LCI 3.0sd Rear Axle Differential Diff 3,23 Ratio 7544794 WARRANTY

Product currently unavailable

Part no. 7527005

BMW E60 525i M54 Rear Differential Diff 3,73 Ratio 7527004 WARRANTY

Product currently unavailable

Part no. 7566221-1

BMW 3 Series E90 325i N53 Differential Diff 3,46 Ratio 7566221 RECONDITIONED

Product currently unavailable

Showing 1-99 of 233 products

Car differentials for precise power distribution

Precision differentials for optimal drive distribution

Have you ever wondered what makes your car corner smoothly and handle road bumps effectively? This is due to the differential – a key component of your car's drivetrain. Without this differential gear, traveling would be significantly less comfortable and safe. A functional differential ensures that each wheel rotates at the appropriate speed, adjusted to road conditions and maneuvers performed by the driver. A malfunctioning or damaged differential can lead to many problems – from difficulty in steering to serious failures of other drivetrain parts. Symptoms of a faulty differential may include noise coming from the axle area, difficulty when turning, and uneven tire wear, which is why it is worth paying attention to regular technical inspections of your car and taking care of the condition of all its components. In our Global Parts automotive store with spare parts, you will find a wide selection of high-quality used differentials that are not only durable but also available at attractive prices. You can easily order them online and add selected car differentials to your cart. Taking care of the good condition of the differential is an investment in the comfort and safety of every journey, as well as the longevity of other components of your vehicle. Regular maintenance of this mechanism guarantees smooth driving regardless of road conditions or the type of equipment used. A car differential is a mechanism whose main task is to distribute torque between the wheels of the drive axle, allowing them to rotate at different speeds in corners. In passenger vehicles, open differentials, LSD (Limited Slip Differential), and electronic E-Diffs are most commonly used. For example, a BMW X3 E83 differential ensures precise torque transfer to the rear wheels, which improves traction on slippery surfaces. In practice, a typical rear differential for a BMW E46 318i has a gear ratio of 3.91:1 and a weight of approximately 35 kg, which allows it to work effectively with the driveshaft and half-shafts. Compatibility of differentials with a specific VIN guarantees full interchangeability and fitment with the rest of the drivetrain. This saves installation costs and minimizes the risk of improper vehicle operation.

Construction and purpose of differentials

Differentials are drivetrain assemblies mounted on the drive axle or in the axle housing, designed to distribute torque between the left and right wheels. A typical unit consists of a housing, ring gear, pinion shaft, spider gears, bearings, and seals. In product listings, it is worth checking data such as the OEM part number, interchangeable numbers, vehicle placement, and fuel type, as these affect compatibility with a specific car version.

Comparison of car differential variants

Variant	Operating characteristics	Elements to check before purchase	Application
Open differential	Standardly distributes torque to the wheels and allows them to rotate at different speeds in a turn.	OEM number, gear ratio, mounting type, compatibility with half-shafts and driveshaft.	Most common in road cars.
LSD differential	Limits excessive wheel slip and improves power transfer in poor traction conditions.	Type of locking mechanism, gear ratio, housing, compatibility with the drive axle.	Sport versions, higher-performance variants, and dynamically used cars.
Electronic E-Diff	Works in conjunction with the vehicle's electronics and stability control system.	Control compatibility, equipment version, cooperating sensors, OEM number.	Modern drivetrains with advanced electronics.

Table of example BMW differentials

Model	Type	Ratio	Weight
BMW E46 318i	Rear differential	3.91:1	35
BMW X3 E83	Rear differential	3.91:1	38
BMW 320d E90	Rear differential	3.91:1	36

Differentials - Original spare parts from well-known automotive manufacturers

In our offer, you will find original used differentials, as well as differentials refurbished by our company for brands such as BMW, Mercedes, Audi, Ford, Volkswagen, or Mini. Thanks to our cooperation with experienced automotive advisors with over 10 years of experience, we will help you choose the right differential for your car. Our specialists provide professional advice and support at every stage of purchasing a differential. By using our services, you can be sure that you are choosing the best differentials available on the market. All our differentials are carefully selected and tested for durability and performance. This way, you can be sure that your vehicle will operate flawlessly for many years. Thanks to the wide assortment of products in the Global Parts automotive store, we offer differentials suitable for many passenger car models. We place great emphasis on the quality of our products and ensure that every customer finds something for themselves in our store. We stock differentials with various technical parameters and prices adapted to individual user needs. You can easily browse our offer online and add selected differentials to your cart without leaving your home. Reliable drivetrain operation is crucial for driving safety and travel comfort. That is why it is worth investing in original used parts from renowned manufacturers and distributors such as Global Parts. Thanks to them, your car will always be ready for any route – regardless of road conditions or surface type. If you are not sure which differential best fits your car or have questions regarding installation – our experts are always ready to help. Simply contact us by phone or email; we will be happy to provide all information and advise you on choosing the right spare parts. Investing in original components from proven manufacturers is a guarantee of reliability and longevity for your vehicle. By taking care of your car's condition through regular replacement of worn parts, you will ensure a smooth ride without unexpected breakdowns or technical problems. In addition to standard differentials, our offer also includes BMW LSD limited-slip differentials, which increase traction on surfaces with varying friction coefficients. Thanks to OEM numbers, you can precisely match the differential to the specific model and year of the car.

The importance of gear ratios and cooperating elements

The differential gear ratio is used to match the drivetrain characteristics to the engine, gearbox, and wheel diameter. It influences how torque is delivered, the car's acceleration response, and RPMs while driving at a constant speed. When choosing, it is worth comparing not only the OEM number but also the housing, mounting points, and compatibility with differential bearings and seals.

Choosing a differential for the car version and drive type

The differential is designed to work with the driveshaft, half-shafts, and hubs, so its selection should take into account the engine version, fuel type, and mounting location. For parts such as a BMW E90 320i differential, you must compare the gear ratio, OEM number, and rear housing mounting method to avoid fitment issues. Additionally, it is helpful to compare the offer with differential repair kits and other differential parts if a more extensive repair is planned.

Practical tips for replacement and condition assessment

Differential bearing is the support system for the pinion shaft and the differential carrier, which is responsible for the smooth and quiet operation of the entire assembly. Worn bearings, backlash in the gearing, or leaking seals can cause whining, vibrations, and oil leaks. When choosing an element such as a Mercedes W211 rear axle, it is worth checking the condition of the mounts, housing tightness, and compatibility with half-shafts, while if you are looking for a component such as an E46 differential, it is good to compare the OEM part number, gear ratio, and body style. A useful supplement to the selection process is the article Drive axles and differentials from dismantling – how to choose gear ratios for driving style.

Differential installation procedure includes

Lifting the vehicle and removing the driveshaft.
Unscrewing and removing the old differential.
Installing the new differential while maintaining the manufacturer's tightening torques.
Changing the oil in the differential.
Test drive to verify correct operation.

FAQ

Question	Answer
What is the construction and purpose of differentials?	Differentials are drivetrain components mounted on the drive axle or in the axle housing. They usually consist of a housing, final drive, spider gears, side gears, bearings, and seals. Their task is to distribute torque between the wheels of one axle and allow for a difference in rotational speed while turning.
What are differentials used for?	Differentials are used for smooth power transfer to the wheels while maintaining car stability in corners. Thanks to them, the inner and outer wheels of the drive axle can rotate at different speeds without jerking the drivetrain. Failure of this assembly can cause noise, overload the half-shafts, and impair vehicle handling.
What is the construction and function of differential bearings?	Differential bearing is a system of bearings supporting the pinion shaft and the differential carrier. It serves to maintain the proper position of gear elements, limit backlash, and ensure uniform gear operation. Its condition affects noise levels, gear durability, and the tightness of the entire assembly.
How to choose a differential for a specific car version?	When choosing, it is best to compare the OEM part number, interchangeable numbers, gear ratio, and vehicle placement. It is also worth checking the fuel type, body version, drive type, and compatibility with half-shafts and the driveshaft. If the car was available in several equipment variants, verification by VIN will also be helpful.
What symptoms may indicate differential wear?	Most commonly, these are whining or humming sounds that increase with speed, jerking when changing loads, and noticeable play in the drivetrain. Symptoms also include oil leaks from the housing and uneven operation during turns. Such signals should be compared with the condition of bearings, seals, and mounts.
What does the installation and maintenance of a differential look like?	Installation involves removing the driveshaft, disconnecting the half-shafts, replacing the assembly, and resetting all connections according to the manufacturer's documentation. After installation, check for leaks, mount condition, and the correct oil specified for the given design. In operation, regular checks for leaks, noise, and play appearing during driving are important.

Summary: differentials at the Global Parts automotive store

Differentials are crucial for the operation of the entire drivetrain, so when purchasing, it is worth paying attention to the OEM part number, interchangeable numbers, vehicle placement, and compatibility with the car version. The Global Parts offer includes used and refurbished elements for many models, including for brands such as BMW, Mercedes, Audi, and others. This makes it easier to select the right differential for a planned repair or replacement of the entire assembly. 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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