BMW E46 Transmission Service – Automatic 1998-2005 3 Series

So...did you hear that rumor floating around that all 3 series cars built between 1998 and 2006 (E46) have "lifetime" fluid fills in their automatic transmissions and they never need to be serviced?

Hmmmm. Well it's not a rumor. In fact BMW was kind enough to scare the bejesus out of us by plastering a green WARNING sticker on the bottom of every E46 tranny verifying this. But what exactly is their definition of "lifetime"? Is it the lifetime of the owner (yikes)? The lifetime of the car (not sure what defines that)? Or is it the lifetime of the transmission before it burns up and leaves you stranded from not being serviced?

The term "lifetime" actually means the "service life" of the transmission, which in the case of the BMW E46 is 100,000 miles. In other words, BMW recommends that the transmission fluid does not need to be changed or topped off until after the vehicle surpasses 100,000 miles. This is simply a recommendation and not the law. Like every other mechanical part on your vehicle, the transmission needs to be regularly serviced to keep it operating correctly. Period...end of story.

The BMW Repair Guide recommends at a minimum an E46 transmission service fluid and filter change every 60,000 miles. This recommendation is for "normal" driving conditions. If you track/race your vehicle or are a more aggressive driver, we suggest a BMW E46 transmission service even more frequently.

Table A - E46 Automatic Transmission Guide

Model	Year	Transmission
323i/Ci/iT	1999-2000	A5S360R (GM) (up to 03/00) A5S325Z (ZF) (from 03/00)
325i (M54 engine)	2001-2005	A5S325Z (ZF) (up to 03/02) A5S390R (GM) (from 03/02)
325i (M56 engine)	2003-2005	A5S325Z (ZF)
325Ci	2001-2005	A5S325Z (ZF) (up to 03/03) A5S390R (GM) (from 03/03)
328i/Ci	1999-2000	A5S360R (GM) (up to 05/00)
330i/Ci/Cic	2001-2005	A5S325Z (ZF) (up to 03/03) A5S390R (GM) (from 03/03)
325xi/xiT 330xi/xiT	2001-2005	A5S390R (GM)
325iT	2001-2005	A5S390R (GM) (up to 03/03) A5S325Z (ZF) (from 03/03)