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BMW Drivetrain Parts for BMW E21 320i M10 1.8L

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Building your perfect BMW is more than just adding horsepower and stiff suspension. Your drivetrain needs attention in order to deliver power effectively. Most BMWs feature comfortable clutch discs, heavy flywheels, long shifter throws, and open differentials. The drivetrain transmits power to the wheels, but can also be a source of power loss when it is designed for comfort rather than performance. Everything on this page will help you improve your power delivery and driving experience by providing custom Limited Slip Differentials, Short Shift Conversions, Performance Clutch Discs, Lightweight Flywheels, and anything else your BMW needs to be the perfect driving experience.

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OEM Rein Magnetic Differential Oil Drain Plug - M22x1.5 - Most BMW & ...

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T#:38890943

Part#: HWU0065

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$ 23.99 USD

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$ 23.99 USD

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As components in the differential begin to wear, metal particles become loose in the diff fluid, which can lead to excess wear. This magnetic plug pulls these particles out of suspension, helping to reduce wear over time. Replaces BMW # 33117525064

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MOTUL 75W-90 GEAR 300 Synthetic Gear and Differential Fluid

T#:2451

Part#: MOGR300-75W90

In Stock

10% off MSRP $ 37.85

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 34.06 USD

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10% off MSRP

$ 37.85

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 34.06 USD

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This MOTUL SAE 75W90 gearbox and differential fluid is a 100% synthetic ester based oil, which can be used in tranmissions and rear differentials under all conditions of use -- street, track and racing. This oil has proved its qualities and resistance to extreme conditions. We would not hesitate to use this MOTUL 75W-90 GEAR 300 gear oil on our own personal vehicles, and neither should you. Be sure to check your owners manual before selecting oil products for street applications. This is a 1 liter bottle, so be sure to order enough for your specific application. API GL-5.MIL-L-2105D.

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300V 5w40 "Competition" - 2 Liters

T#:13957881

Part#: 110817

In Stock

10% off MSRP $ 60.83

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 54.74 USD

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10% off MSRP

$ 60.83

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 54.74 USD

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Use for Endurance/Rally/ GT/ Historic racing 100% synthetic racing motor oil based on ESTER Core® technology. Through technical partnerships with most prestigious Teams of car racing, MOTUL has developed a wide range of lubricants for Racing and Sport cars. The 300V motorsport line improves performance of the latest generation engines along with high protection against wear, oil pressure drop and oxidation due to high temperature. Power & engine protection. Medium to high engine dilution. Color: Visual Orange Viscosity grade SAE J 300 5W-40 Density at 20°C (68°F) ASTM D1298 0.850 Viscosity at 40°C (104°F) ASTM D445 78.7 mm²/s Viscosity at 100°C (212°F) ASTM D445 13.5 mm²/s HTHS viscosity at 150°C (302°F) ASTM D4741 4.0 mPa.s Viscosity Index ASTM D2270 176.0 Pour point ASTM D97 -48.0 °C / -54.0 °F Flash point ASTM D92 234.0 °C / 453.0 °F

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MOTUL 300V 10W-40 Chrono Race Oil - 2 liter can

T#:2448

Part#: MO300V-10W40-2L

Ships on Aug 6, 2026

28% off MSRP $ 60.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 43.99 USD

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28% off MSRP

$ 60.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 43.99 USD

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10W40 MOTUL 300V series "CHRONO" competition racing oil is a true racing lubricant for true race cars. Designed for high temperatures, high shear, and the rigors of professional and endurance racing. MOTUL has developed Double Ester Technology for new 300V series, superior to complex ester which was previously recognized as the best base oil (up to now!). Double Ester Technology, made by carefully balancing the ratio of complex ester and the newly developed macromolecular high polymer ester, enable base oil more wide-ranged, and delivers high output performance and superior reliability.

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Motylgear Manual Transmission / Differential Fluid 75w90 - 1 Liter ...

T#:340559

Part#: 317011

Back Ordered

10% off MSRP $ 20.44

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 18.40 USD

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10% off MSRP

$ 20.44

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 18.40 USD

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Flushing and replacing your manual transmission and differential fluid is one way to ensure that components wear properly to avoid costly problems down the road. Your owner's manual will specify intervals for flushing and refill.

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Rein Driveshaft Center Support Bearing

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T#:379700

Part#: 26121225071

In Stock

$ 13.50 USD

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$ 13.50 USD

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Commonly referred to as "carrier bearing"

Rein TRANSMISSION SEAL (40X58X10) - E12, E21

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T#:19834

Part#: 24111207426

Ships in 3 Business Days

$ 13.99 USD

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$ 13.99 USD

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The input shaft seal on your transmission ensures that you will not experience any fluid loss from behind the guide sleeve. If you have a leak, be sure to replace it as soon as possible to avoid losing too much fluid, which can ultimately damage your transmission. For front wheel drive vehicles equipped with manual transmissions only.

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Rein Selector Rod Shaft Seal - E12, E21, E23, E24, E28

For vehicles with a production date from 04/1977

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T#:592120

Part#: 24527509500

Ships in 1 Business Day

$ 4.07 USD

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$ 4.07 USD

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10x18x5mm seal - stop leaks in their tracks

OEM Rein Driveshaft Center Support Bearing - E21 E28 E10 E12 E23 E24 ...

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T#:379750

Part#: 26111206502

Back Ordered

$ 23.99

This product was last offered at the strikethrough price on
06-26-2026

$ 18.99 USD

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$ 18.99 USD

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Center support bearings help to add some support to the driveshaft in a BMW. Because it is designed to be a two piece system, bracing needs to be added to the center to keep your driveshaft in line and tight. If you are noticing excessive vibration or gear noise in your vehicle, it may be time to replace the support bearing.

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OEM Rein Transmission Input Shaft Seal - E12 E21 E23 E24 E28 E30 E31 ...

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T#:379685

Part#: 24311422671

Ships in 3 Business Days

$ 10.99 USD

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$ 10.99 USD

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The input shaft seal on your transmission ensures that you will not experience any fluid loss from behind the guide sleeve. If you have a leak, be sure to replace it as soon as possible to avoid losing too much fluid, which can ultimately damage your transmission.

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OEM Rein CV Boot Repair Kit - E21 E10

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T#:12274

Part#: 33219067911

Ships in 1 Business Day

$ 10.99 USD

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$ 10.99 USD

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This is the OEM Rein rear axle boot kit for the CV joint. The kit includes the boot, clip, clamp, and grease.

Rein Differential Drain Plug Gasket

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T#:19654

Part#: 07119963355

Ships in 3 Business Days

$ 2.03 USD

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$ 2.03 USD

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GASKET RING for various sensors and seals.

Motul Motyl Gear SAE 75W80 Gear Oil - 1 Liter Bottle (1.05 Quart) ...

T#:2249

Part#: MOTY-75W80-1L

Ships on Aug 18, 2026

10% off MSRP $ 20.44

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 18.40 USD

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Qty

10% off MSRP

$ 20.44

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 18.40 USD

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Motul Motylgear 75W80 is a gear oil/gearbox lubricant especially recommended for hard to shift gearboxes and also for BMW, Peugeot, Citroen, and Renault gearboxes. Motul has formulated Motylgear 75W-80 as an extreme pressure lubricant for efficient anti-wear protection and reinforced it with synthetic base stocks for a better resistance at high temperature and for longer life.

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300V 15w50 "Competition" - 2 Liters

T#:11660857

Part#: 110860

Special Order: No Guaranteed ETA

10% off MSRP $ 60.83

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 54.74 USD

Add to Wish List

Qty

10% off MSRP

$ 60.83

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 54.74 USD

Add to Wish List

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