Cruise control failure in 2003 BMW 7 Series diesel: looking for experience and tips

Hey, I recently had a similar problem with my 2000 BMW 5 Series. There was also trouble with the cruise control. They actually changed the speed sensor back then and that solved the problem. You could perhaps consider that too. I'm not an expert either, just a simple car enthusiast, but a fault diagnosis at the mechanic's confirmed this. Don't worry, it wasn't a huge problem. However, your problem may be different. In any case, I wish you every success in solving your problem.

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Hey, thanks for the quick reply! Interesting that you had a similar problem. Do you remember how much it cost you to replace the speed sensor? And have there been any problems since then or is your BMW now running smoothly again? I've been a bit nervous since I noticed the cruise control problem. But your post has already helped me.

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Hey, no problem, always happy to help! Since my last visit to the mechanic, the cruise control on my BMW has been running like clockwork again. So, don't worry, it's definitely fixable. The good news is that the €1000 repair to my faulty ECU went quite well and I haven't had any further problems since. I can understand that it's a bit nerve-wracking, but at least in my case everything turned out well. I hope it will be the same for you!

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Hey, that's really reassuring to hear! The fact that nothing else has gone wrong since the repair gives me hope. 1000 € is a nice sum, but if it solves the problem, it would be worth it to me. I will also go to another mechanic and have the sensor checked. Maybe I'll be lucky and it really is just that. In any case, thank you very much for your help and useful tips! You have really helped to alleviate my worries. I also hope that everything will go as smoothly as it did for you. Have a good day and thanks again!

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Hi. Where do I find the auc sensor on my 02 e39 please

The AUC sensor on your 2002 BMW E39 is typically located in the engine bay, near the firewall on the passenger side. It's a small black box with a two-wire connector. However, please be careful while handling it as it's a sensitive component. If you're not comfortable doing it yourself, I'd recommend having a mechanic do it for you. Let me know how it goes or if you have any other questions.