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BMW 4 Series Convertible problems again and again the starter does not work

Hey everyone, my 2018 BMW 4 series diesel with 186,543 km is causing problems. I have the following symptoms: prolonged cold start, car won't start, strange engine noises, weak battery when starting, dimmed or flickering lights and a warning light in the speedometer. I think it could be the starter motor. Have any of you had similar experiences or any tips on what else it could be? I am cautious after a bad experience at the last mechanic visit. Thanks in advance!

(Translated from German)

14 comment(s)

Quotation:
@CarlyAdminBenny wrote on
Hello, can you tell us the error text that is displayed for this error? This would help us with troubleshooting. Kind regards

- Secondary air pump short circuit to positive 00CED4 (I have not installed one, at least where there should be one there is a cover screwed on) - Combination warning light (engine running message error, EPS receiver, DME or DDE transmitter) 00D514 - Access control (CAS) (starter terminal 50) 00A0B3 I checked all the fuses that are responsible for fuel and engine according to the fuse diagram, as well as the relays in the fuse box and control unit box. It was the "thin flat cable" that was not connected and connects the cylinder head to the body. The vehicle was also disconnected from the battery for several days.

(Translated from German)

Quotation:
@Flexer1895 wrote on
- Secondary air pump short circuit to positive 00CED4 (I have not installed one, at least where there should be one there is a cover screwed on) - Combination warning light (engine running message error, EPS receiver, DME or DDE transmitter) 00D514 - Access control (CAS) (starter terminal 50) 00A0B3 I checked all the fuses that are responsible for fuel and engine according to the fuse diagram, as well as the relays in the fuse box and control unit box. It was the "thin flat cable" that was not connected and connects the cylinder head to the body. The vehicle was also disconnected from the battery for several days.

Hello, have you ever checked the ground strap that goes from the body to the engine? This is also often broken on the 1s.

(Translated from German)

Quotation:
@CarlyAdminBenny wrote on
Hello, have you ever checked the ground strap that goes from the body to the engine? This is also often broken on the 1s.

I unscrewed all the ground straps, cleaned the seats, sprayed them with contact spray and then measured them.

(Translated from German)

Quotation:
@Flexer1895 wrote on
I unscrewed all the ground straps, cleaned the seats, sprayed them with contact spray and then measured them.

Hello, then it's beginning to sound as if your engine control unit has been damaged. I would advise you to really check all the cable connections that you have unscrewed and if nothing can be found then I would have the engine control unit checked by a suitable company.

(Translated from German)

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