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ChrisMai

Problems starting and dimming lights in BMW 2 Series Diesel, year of manufacture 2018: Is the engine control unit to blame?

Hey guys, I have a strange problem with my 2018 BMW 2 series diesel. It starts hard, the battery seems to be low when starting and the lights flicker or are dim. Could it be that the problem is in the engine control unit? Has anyone had this before and how did the garage fix it? I'm really looking forward to your experiences and tips. Thanks in advance.

(Translated from German)

Summary of the thread

A 2018 BMW 2 Series Diesel is experiencing hard starting and dimming lights, raising concerns about a potential issue with the engine control unit. However, a similar problem in another BMW model was resolved by addressing a failing battery. It is suggested to check the battery's condition as it might be the cause of the symptoms.

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4 comment(s)

DanZimFan

Hi, had a similar problem with my 2016 BMW 3 series diesel, I'm no expert but have a bit of experience with cars. Your problem could be related to a low fuel level. I had fuel level too low on my engine control unit. I went to the garage and had it fixed there. It cost me 205 euros, but after that everything ran fine again. If you give me more information about the car, I might be able to help you in more detail. I hope that helps you a bit.

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ChrisMai (community.author)

Hey, thanks for the answer. My mileage is 28874 km, the last service was also very recent. The fuel gauge is full, so that can't really be it. There is also no error message on the engine control unit. It really is a mystery. Maybe I really should take it to the garage. I was hoping I could solve it myself somehow. Any other ideas or tips would be great!

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DanZimFan

Hey, I know exactly what you mean. Now, if you say the tank is full and there was no service alarm, then I'm almost certain it's the battery. Had similar symptoms with my beamer, hard start, dimming lights, stuff that just boggles your mind. Took mine to an electrician who said the battery was almost gone. I then bought a new one for, I think, 180 euros and everything has been tip-top ever since. So, if I were you, I'd have the battery checked. Hope that helps.

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ChrisMai (community.author)

Wow, thank you very much, that sounds really plausible. I wouldn't have thought that it could be the battery! So I'll have the battery checked at a garage. Your support was really great, it helped me a lot! Thanks again and have a nice day!

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BMW

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2