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BMW Drivetrain Parts for BMW Z4 M Roadster S54 (2003-2008)

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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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Differential Input Shaft Seal - Priced Each

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T#:49335120

Part#: 33121213949

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$ 18.99 USD

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$ 18.99 USD

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Replaces cracked or hardened valve body seals

Shifter Repair Kit - Each

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T#:55245795

Part#: 2511143XKT

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$ 13.04 USD

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$ 13.04 USD

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Tighten up your track day or spirited street shifts with this Genuine BMW Selector Rod refresh kit.

Manual Transmission Detent Compression Spring Kit

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T#:55245852

Part#: 2331XXKT

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$ 17.52 USD

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$ 17.52 USD

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This Genuine BMW Compression Spring Kit replaces the weak factory shift springs that control the mechanical resistance and centering of your shift lever.

Shifter Linkage Hardware Kit

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T#:55209907

Part#: 25111KT

In Stock

$ 8.91 USD

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$ 8.91 USD

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This kit ensures your shift linkage stays safely secured and firmly engaged through every hard shift.

Shifter Hardware Refresh Kit

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T#:55209911

Part#: 2511122KT

Ships in 3 Business Days

$ 5.27 USD

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$ 5.27 USD

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This Genuine BMW Manual Shift Selector Rod Hardware Kit includes the exact factory-spec shims and securing clips needed to safely lock down your shift linkage.

Rear Output Shaft Kit

03-08 Model Years

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T#:55102439

Part#: 33217839465/6KT

Ships in 3 Business Days

$ 1,974.99 USD

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$ 1,974.99 USD

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Over time, factory output shafts wear down, leading to unwanted play, vibrations, and a sloppy power delivery that ruins an otherwise perfect drive.

Shaft Seal - Differential (Axle Drive)

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T#:54852004

Part#: B46.610

Ships in 8 Business Days

$ 14.99 USD

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$ 14.99 USD

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This OEM-quality replacement shaft seal from Elring is the perfect fix for keeping your gear oil where it belongs.

Transmission Hardware Refresh Kit

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T#:55317663

Part#: 2331MTKT

Ships in 10 Business Days

$ 66.67 USD

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$ 66.67 USD

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If your BMW’s manual shifter feels loose or struggles to cleanly find its gates, it’s time to rebuild your transmission shift detents.

Shifter Rod Joint

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T#:54068659

Part#: 25117580281

Ships on Oct 19, 2026

Sale - Save 20% $ 55.99

This product was last offered at the strikethrough price on
05-30-2026

$ 44.79 USD

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Sale - Save 20%

$ 55.99

This product was last offered at the strikethrough price on
05-30-2026

$ 44.79 USD

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Hydraulic Filter, Automatic Transmission

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T#:55461366

Part#: 1003250005

Special Order: No Guaranteed ETA

$ 19.99 USD

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$ 19.99 USD

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This MEYLE automatic transmission filter screens out those harmful contaminants before they can reach critical hydraulic valves.

Meyle Automatic Transmission Fluid Plus 9 - 1 Liter

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T#:55569543

Part#: 0140193200

Special Order: No Guaranteed ETA

$ 24.99 USD

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$ 24.99 USD

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Don't let fluid breakdown slow down your shifts or trigger performance-robbing transmission slip when you're pushing your car to the limit. This Meyle ATF Plus 9 high-performance transmission fluid is engineered to withstand the extreme thermal loads and intense shear stress generated during aggressive street driving and high-RPM track sessions. Its advanced synthetic formula provides a robust lubricating film that limits friction within the gearsets and maintains crisp clutch engagement, ensuring your multi-speed automatic handles rapid downshifts and hard acceleration flawlessly.

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Rein Magnetic Transmission Drain Plug

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T#:53785537

Part#: HWU0117

Back Ordered

$ 16.99 USD

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$ 16.99 USD

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Magnetic Rein Transmission Plug Features Aluminum Construction with OE Dimensions and Threading. Magnetic Tip for Upgrade over Stock. Lightweight and Durable Construction Designed to Interface Perfectly with Modern Alloy Gear Housings

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