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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 09-04-2014, 12:48 AM   #1
Registered User
Join Date: Sep 2014
Location: california usa
Posts: 1
My Ride: 2003 330ci cabrio
transmission problem

i own 03 330ci cabrio, there's an icon shows in dashboard lit up next to D that create some problems in the rear. engine lite come on & code sows PO734 gear 4 incorrect ratio. what does this mean.
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Old 09-04-2014, 05:28 AM   #2
Registered User
Join Date: Sep 2013
Location: Paradise 530
Posts: 167
My Ride: 04 E46
Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit
Your transmission is stuck in "limp mode" I had this same issue, check your fluids and go from there. I did a full flush with mine and refill drove a few miles and check the levels again, light went off no issues since

2004 BMW 325i (E46)
130.xxx 8/20/14
148.767 3/28/16

Oil filter housing gasket
Purge Control Valve
Lower control arm bushings
throttle body intake boot + Stg 2 K&N system
Full transmission Flush (Mobil1 synthetic ATF Fluid)
Bank 1 & Bank 2 Pre-cat 02 sensors
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