BMW Transmission Parts for BMW E21 320i M10 1.8L

Clear BMW chassis

Please ensure your correct model is selected

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.

Sub-Categories

Sort By:
Pentosin ATF 8 Automatic Transmission Fluid - 1 Liter - BMW 8HP Transmissions
Pentosin ATF 8 Automatic Transmission Fluid - 1 Liter - BMW 8HP Trans...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Pentosin - Corporate Logo
T#:45963154
Part#: 1058110
In Stock
$ 26.99

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

$ 25.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 25.99 USD
Free Shipping on orders $49 and up
Add to Wish List
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.
Show More Show Less
Pentosin ATF 8 Automatic Transmission Fluid - 5 Liters - BMW 8HP Transmissions
Pentosin ATF 8 Automatic Transmission Fluid - 5 Liters - BMW 8HP Tran...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Pentosin - Corporate Logo
T#:45997487
Part#: 1058210
In Stock
$ 113.99

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

$ 109.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 109.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Backup Light Switch - E30 E28 E24 E23 E32 E34
Backup Light Switch - E30 E28 E24 E23 E32 E34
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
FAE - Corporate Logo
T#:13246
Part#: 23141354071
In Stock
$ 11.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 11.99 USD
Free Shipping on orders $49 and up
Add to Wish List
This is the reverse light switch that is mounted on the back of the transmission. Only for cars with manual transmission.

This item fits the following BMWs:
1977-1983 E21 BMW 320i
1984-1991 E30 BMW 318i 318is 318ic 325e 325es 325i 325ic 325is 325ix M3
1976-1981 E12 BMW 528i 530i
1982-1988 E28 BMW 524td 528e 533i 535i 535is M5
1989-1991 E34 BMW 525i 530i 535i 540i M5
1982-1989 E24 BMW 633csi 635csi M6
1981-1987 E23 BMW 733i 735i
1988-1991 E32 BMW 735i 735ill
Show More Show Less
Pentosin Super DOT4 Brake Fluid - 1 Liter
Pentosin Super DOT4 Brake Fluid - 1 Liter
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
2X Entries For Our G87 M2 Sweepstakes!
Pentosin - Corporate Logo
T#:348645
Part#: BF1P4
In Stock
$ 19.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 19.99 USD
Free Shipping on orders $49 and up
Add to Wish List
Boiling Point - Dry 265°C (509°F) / Wet >165°C (329°F)
Pentosin ATF 9 Automatic Transmission Fluid - 1 Liter
Pentosin ATF 9 Automatic Transmission Fluid - 1 Liter
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Pentosin - Corporate Logo
T#:46134785
Part#: 1058111
Ships on Jul 28, 2026
$ 31.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 31.99 USD
Free Shipping on orders $49 and up
Add to Wish List
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.
Show More Show Less
Pentosin ATF 9 Automatic Transmission Fluid - 5 Liters
Pentosin ATF 9 Automatic Transmission Fluid - 5 Liters
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Pentosin - Corporate Logo
T#:46134786
Part#: 1058211
Ships on Jul 28, 2026
$ 139.99 USD
Free Shipping on orders $49 and up
Add to Wish List
$ 139.99 USD
Free Shipping on orders $49 and up
Add to Wish List
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.
Show More Show Less

Select Vehicle

BMW Mini
Clear Vehicle

Category

Brand

Price

$
$