E46 M3 Manual Gearbox
By the Editorial Staff
March 16, 2026
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If the manual transmission in your 2001-2006 E46 M3 is making grinding sounds or is difficult to shift, it may be time to consider a replacement. This original BMW 6-speed manual gearbox is brand new, so there is no core charge or core return required. BMW E46 M3 Manual Conversion Kit.
Tired of your old worn out faulty SMG? We are now offering our complete kits to convert your SMG to manual! Includes Genuine BMW parts as well as other OEM parts, fluids, plug and play wiring harness and more. BMW 6 Speed Manual Bellhousing is also included! E46 M3 SMG to Manual kit. E46 M3 6 Speed Manual Gearbox S6S 420G - TBAI Brand: ES#: 41980 Mfg#: 23002229721 Qty: Availability: Ships in 4 Business Days.
A side note on general SMG issues: If you have issues with your SMG Gearbox/Clutch system, you are wise to consider an SMG-to-Manual Conversion from the offset. This is because the labour costs involved with ongoing and sometimes open-ended diagnosing SMG issues, and then the eye-watering prices of the many different BMW SMG Parts can easily 'run away' and before you know it become an unviable. 2001-2006 E46 BMW M3 6 Speed Manual Transmission w/ Shifter / S6S 420G TBAI Donor Car: 2004 E46 BMW M3 Convertible - 161K Functionality: In good working condition, fully tested prior to removal from a running and driving vehicle.
Fluids have been drained with no abnormalities. Will ship drained of all fluids. Transform your E46 with a manual transmission swap.
Get expert tips, step-by-step instructions, and essential tools for a smooth conversion. The BMW E46 manual transmission is renowned for its precise gear engagement and smooth shifting, making it a favorite among driving enthusiasts. Key features include a robust 5-speed or 6-speed gearbox, designed to handle varying engine outputs, from the economical 2.0L diesel to the high.
A comprehensive E46 M3 manual conversion kit typically includes all the necessary parts to transform your SMG-equipped car into a proper manual․ Central to the kit is the manual gearbox itself' often a Getrag six-speed․. The first-generation SMG (or Sequential Manual Gearbox) transmissions in the E46 M3 have not held up well over the long run and are starting to empty the pockets of their loyal owners as its very common for the SMG pump to fail. Many M3 owners prefer the 6-speed manual transmission (6MT) for its superior driving experience.
Our manual conversion package turns your M3 into a true driver's car.