As it appears pre 3/04 production cars need a new TCU B4 Bluetooth will work, I was wondering if anyone has had any problems with their TCU that required a replacement of the TCU. Perhaps my car has the same problem.

 

I posted a while ago on a notice from BMW on a TCU problem that was causing echo's on the recieving party's end. My car is a 5/04 build - I'll check with the dealer and post what I find out.

 

yes, interestingly my car was built in May and while setting up BT the dealer seemed to have problems making it work. They installed another TCU unit (actually produced much earlier than the original one in my car) and then BT worked.

It may be that the one that I had was defective and that the older TCU unit was not. But the surprising thing was that the TCU that worked was made in March 04!

So, it may not only be the production/installation date of the TCU but also if the one in the car is defective!

Just because you have one from a January build does not mean it works (BT or not).

 

Tell your dealer that people can hear you very badly on the the phone, you've tried several phones with several people, also collegaues who have almost the same car as yours donot have this issue. You've heard the only solution for it is to replace the TCU.

Worked on my car (but I really had that issue........).

Good luck in convincing your dealer (hoping he's not reading with you on this forum!)

 

When I went in for my oil change, winter tires, software update and some recall work apparently my TCU would not take v13.3 so the dealership stuck a new one in.....

Now if only I could get Sprint to do BT right.....

 

When I went in for my oil change, winter tires, software update and some recall work apparently my TCU would not take v13.3 so the dealership stuck a new one in.....

Now if only I could get Sprint to do BT right.....
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Sans, how long did it take you to get the new TCU installed? My car has now been at the dealer for three days for the emissions recall/software update, and when I spoke with them this afternoon, they said it wouldn't "take", but that it would definitely be ready tomorrow. Right! I don't care about BT, just curious about the TCU change and if that took a while to get parts etc.

Ken

 

Mine is a bad comparison because they needed to outsource the fitting of my runflat snows - THEN they couldn't get TCU (after numerous tries) to take the upgrade and I think ordering a new one (my old TCU was part number 84 11 6 948 921; my new TCU part number is 84 11 6 956 688). That took at least four days to arrive; one to install and reprogram. They had my car almost two weeks. Of course, when you're getting a $1800 TCU under warranty, driving a 325xi for a while seems like a fair deal....

 

Well going into day 4 on the software update, I think they might be having similar problems but are not telling me the whole story. The SA tells me they are having trouble getting the new software to take, so I'm wondering how long they will try reloading before they decide to go with a new TCU. If they have been trying for four days then want to order a new TCU and this drags out, I'm not going to be too happy. But what can you do I guess. At least I do have BMW loaner and not a Kia from Enterprise!

 

Just got the call and they finally got the software to take. SA said it was version 15.0, "the latest, greatest". I'll be curious to see if has helped the throttle delay, which I didn't even mention to them when I dropped it off. Sirius is done as well, just need to get it activated.