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      06-12-2007, 04:54 AM   #1
Andrew B
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Z4 Auto fault light

Greetings
I have had the transmission fault lite come up when in Drive and going around a corner, it does not change down and leaves corner in high gear. The BMW shop plugged her in and found some exhaust gas sensor was not good - Changed it now its done it again. Does not do it in SD or M modes - Anyone else had this - ta Andrew
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      06-12-2007, 02:41 PM   #2
fire-n-ice
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Andrew, is your vehicle still under warranty? My concern is that if it is not under warranty, they may put you through the ringer.

Seems the exhaust gasket/sensor would have absolutely nothing to do with transmission system. Your reference sensor may be bad though, ask them to check that.
BMW's have excellent tranny's and it is not popular for them to 'go bad'. Although my dad's did - it was a lemon so it can happen, just not often.

Let us know what fixes the problem and good luck.
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      06-17-2007, 08:43 AM   #3
Ski
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Quote:
Originally Posted by Andrew B View Post
Greetings
I have had the transmission fault lite come up when in Drive and going around a corner, it does not change down and leaves corner in high gear. The BMW shop plugged her in and found some exhaust gas sensor was not good - Changed it now its done it again. Does not do it in SD or M modes - Anyone else had this - ta Andrew
Bad gas sensor..have them change it again..
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      08-06-2007, 08:06 PM   #4
redmansioner
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It must be a bad sensor indeed.Mine has AC problems and my car have difficulties in starting.The clutch gear doesn't engage, my trusted mechanic pointed out the master cylinder and BMW ignition coil has to be replaced.
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