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alexanderfrost1

BMW i4 Radar Sensor Failures Causing Multiple Errors

Failure of various systems in the vehicle

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Fault stored

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Error message in the speedometer

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Warning light in the speedometer of the vehicle

Help needed: BMW i4 (2023) radar sensor problems Having trust issues after my last garage visit, and now my i4 is acting up. Getting multiple system failures, error messages on the dash, and warning lights. The error log shows something's wrong, and I think it might be the radar sensor. Has anyone experienced similar issues with their i4? Mine's done 74,063 km and it's the all-electric version. Looking for honest feedback about repair experiences and potential costs. Not keen on being overcharged again. Thanks in advance for any insights!

4 comment(s)


jasminfire20

I had a similar issue with my 2020 BMW iX3 last month. The radar sensor was giving me all sorts of headaches, adaptive cruise control failed, collision warnings going off out of nowhere, and dashboard lit up like a Christmas tree. Turned out the sensor was just dirty and slightly misaligned. The techs at the garage had to clean it properly and recalibrate the whole system. It wasn't a major repair, but the calibration process was quite precise and needed specific equipment. They explained that these sensors are super sensitive, even a bit of dirt, snow, or road grime can mess with their readings. Since the fix, everything's been working perfectly. The whole radar sensor system is crucial for all the driver assistance features, so it's worth getting it checked out properly. My advice? Get it diagnosed at a certified shop that knows their way around EVs. These systems are too important for safety to take chances with unofficial repairs.

alexanderfrost1 (Author)

Hey, thanks for sharing your experience! My i4 had pretty much the same symptoms you described, really reassuring to know I'm not alone with this. The calibration fix sounds like it did the trick for you. Would you mind sharing what the total cost was for the cleaning and recalibration? Also, have you had any problems with the system since getting it sorted? Just want to make sure I'm prepared for what's ahead with mine.

jasminfire20

Hey there! Just wanted to follow up about the costs since you asked. Took my iX3 to the shop and yes, it was exactly what I thought, just a dirty sensor that needed cleaning and recalibration. The total bill came to 45 € which honestly wasn't bad at all considering how worried I was initially! The best part is everything's been running perfectly since then. No more unusual warnings, no false alarms, and the adaptive cruise control is back to working like a charm. It's been about three weeks now and I haven't had a single problem with any of the systems. Such a relief! I still remember how stressed I was when all those warning lights came on, but it turned out to be such a simple fix. Just make sure you get it done at a proper shop that knows what they're doing with these advanced systems. Worth every penny to have peace of mind while driving. Let me know how yours turns out, always interested to hear if others have the same experience with their BMWs!

alexanderfrost1 (Author)

Thanks for the follow-up! I actually just got back from the mechanic today. You were spot on, it was mainly dirt causing the issue. The technician found some crud built up around the sensor from all the winter driving. The final bill came to a bit more than yours though, they charged me 75 € because they had to do a full system diagnostic first. Still, I'm not complaining since I was worried it would be something major. The car's running perfectly now, no more warning lights or system failures. Funny how something so small can cause such a headache, right? Really appreciate you sharing your experience, it helped me stay calm knowing it was likely just a minor issue. I'll definitely keep an eye on keeping those sensors clean from now on. Thanks again for all your help! Maybe we should start a "dirty sensor support group" for BMW owners! But seriously, it's good to know these high-tech features just need some basic maintenance sometimes. Thanks again for the advice, it really helped me avoid an unnecessary panic!

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