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BMW Transmission Parts for BMW E21 320i M10 1.8L

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Looking for parts for your BMW automatic transmission or manual transmission? You'll find many of the parts available to service your BMW's transmission here. While internal transmission servicing and rebuilding should be done by professionals, there are a lot of things on the outside of the transmission that you can service or replace yourself. These include gearbox seals, o-rings, gaskets, automatic transmission filters, backup light switches, mounting bolts, flanges, collar nuts, screw plugs, Mechatronics, and more.

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Transmission Fluid (5)

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Pentosin ATF 8 Automatic Transmission Fluid - 1 Liter - BMW 8HP Trans...

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T#:45963154

Part#: 1058110

In Stock

$ 26.99

This product was last offered at the strikethrough price on
04-28-2026

$ 25.99 USD

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$ 25.99 USD

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Transmission fluid is responsible for both cooling and lubricating sensitive transmission components. Over time, this fluid becomes contaminated by particulate from clutch and gear components wearing down. This contamination reduces the fluid's ability to act as a lubricant, eventually leading to increased wear and tear within the transmission. To prevent excess wear and keep your transmission in top shape, the fluid and filter should be replaced regularly. As per ZF's recommendations, we suggest performing a full service on your 8HP automatic transmission every 50,000 miles. If your vehicle has been modified to produce more power than stock or if it is regularly track-driven, we recommend shorter 30,000-mile service intervals. This will ensure your transmission's fluid is free from contamination, which will help extend the life of internal transmission components, such as clutch packs and solenoids.

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Pentosin ATF 8 Automatic Transmission Fluid - 5 Liters - BMW 8HP Tran...

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T#:45997487

Part#: 1058210

In Stock

$ 113.99

This product was last offered at the strikethrough price on
04-28-2026

$ 109.99 USD

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$ 109.99 USD

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Elring Selector Shaft Seal - E36, E39, E46, E36 Z3

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T#:340660

Part#: 23121222677

In Stock

$ 5.14 USD

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$ 5.14 USD

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Rubber seals are often hardened and damaged by excessive heat and constant temperature changes causing them to become brittle and crack or split. If your seal has split, replace it with a new Elring seal for long reliability and to prevent further problems.

Elring is one of the biggest OEM names in the manufacturing of high quality gaskets that are available for very affordable prices. Elring has supplied many automotive names for years with the gaskets that seal your car's components from day 1 so you can rest assured that these components will last for a long time to come!

Fits the following BMW's:
E36, E39, E46, E36 Z3

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Elring Input Shaft Seal - E12, E21, E23, E24, E3, E30, E9

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T#:375352

Part#: 23111228314

In Stock

$ 7.13 USD

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$ 7.13 USD

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For vehicles with manual transmission only

Elring Output Shaft Seal - E10, E12, E21, E23, E24, E28, E3, E30, E32...

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T#:13243

Part#: 23121205340

In Stock

$ 9.99

This product was last offered at the strikethrough price on
04-10-2026

$ 4.99 USD

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$ 4.99 USD

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SHAFT SEAL:H23120

Pentosin Super DOT4 Brake Fluid - 1 Liter

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2X Entries For Our G87 M2 Sweepstakes!

T#:348645

Part#: BF1P4

In Stock

$ 19.99 USD

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$ 19.99 USD

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Boiling Point - Dry 265°C (509°F) / Wet >165°C (329°F)

Elring Manual Transmission Gasket Set - E10, E21

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T#:596462

Part#: 23009065645

In Stock at Vendor

$ 54.60 USD

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$ 54.60 USD

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Stop your transmission leak

Pentosin ATF 9 Automatic Transmission Fluid - 1 Liter

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T#:46134785

Part#: 1058111

Ships on Jul 28, 2026

$ 31.99 USD

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$ 31.99 USD

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Pentosin ATF9 is specially developed with reduced viscosity to optimize the performance of the latest generation 8 and 9-speed ZF automatic transmissions. Pentosin ATF 9 has been developed to deliver outstanding friction control to ensure excellent shifting performance.

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Pentosin ATF 9 Automatic Transmission Fluid - 5 Liters

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T#:46134786

Part#: 1058211

Ships on Jul 28, 2026

$ 139.99 USD

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$ 139.99 USD

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Pentosin ATF9 is specially developed with reduced viscosity to optimize the performance of the latest generation 8 and 9-speed ZF automatic transmissions. Pentosin ATF 9 has been developed to deliver outstanding friction control to ensure excellent shifting performance.

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- Transmission Fluid (5)

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