How many miles on AUTOMATIC transmission before failure? (or no problems at all?) - Bimmerfest - BMW Forums

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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

View Poll Results: How many miles on your transmission before repairs or replacement needed?
50,000 to 100,000...transmission repaired/replaced. 161 7.68%
50,000 to 100, problems!!! 655 31.24%
100,001 to 125,000...transmission repaired/replaced. 117 5.58%
100,001 to 125, problems!!! 367 17.50%
125,001 to 150,000...transmission repaired/replaced. 91 4.34%
125,001 to 150, problems!!! 266 12.68%
150,001 to 175,000 or more...tranny repaired/replaced. 73 3.48%
150,001 to 175,000 or problems!!! 367 17.50%
Voters: 2097. You may not vote on this poll

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Old 09-12-2012, 03:48 PM
wendya wendya is offline
Registered User
Location: Southern Indiana
Join Date: Aug 2012
Posts: 50
Mein Auto: 2001 325xi sahara beige
Originally Posted by bimmerized View Post
for those who have not changed or do not know if it has been changed, it's best to change the fluid. Most of the problems that come up after the change are associated with incorrect fluid used. In my opinion its best to stay with a fluid of the same type (dino, semi, full-synthetic) to maintain viscosity regardless of whether it is approved by BMW. A new generation of fluid my not be best for an old transmission. The new fluid may dislodge crude built up over years.

Most importantly, do not ever flush a transmission that hasn't been maintained, just drain and fill 3+ times with new fluid, driven in between.

160K no issues. Fluid changed for first time at 135K.
Thank You!
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