Cold start delete

[A8 PMJ]

Hi everyone, I have a 2019 F90 M5 and I want to do the Cold start delete. Unfortunately the car has had a BMW software update in 2021 and the ECU has been locked. Is there a way to carry out the cold start delete without unlocking the ECU, ie with a Carly code reader?
Cheers Pat

[A8 PMJ]

Appears I have wasted my time.

[Hammy98]

I didn't think the ECU could be locked via software update... my understanding was it was either locked from the factory or unlocked and that was it.

If the ECU is infact locked, it will need to be benched in order for you to do the cold start delete.

Presumably your car has an OPF? if so I don't think the difference in volume will actually be that noticeable. This is predominantly done on non-OPF cars as the cold start is pretty obnoxious with the valves in their default mode. Even at that, if I start my 2018 non-OPF model with the exhaust valve closed (press exhaust button before start) then it's really quiet.

[A8 PMJ]

Thanks Hammy for the info.

[JMBMWM5]

Cold start is for a reason, warms he Cats up quickly, if your situation is just noise in the mornings just shut the sport exhaust off (press the button), this quietens it down a lot.

[Scrubs]

Carly apps etc won't beable to do this as it needs a 'remap' put on the ECU that's just a standard map apart from Cold Start Delete.

I used Bootmod3 to do it on my M4 using their phone app. Made a hell of a difference in the early mornings and had zero effect on anything else. You can also select a custom cold start RPM if you don't want it completely disabled.

[Joe5y]

I had a e92 M3 that had had the cold start removed and always wondered why.

For what reason do people remove cold start?

[Scrubs]

Joe5y said:

I had a e92 M3 that had had the cold start removed and always wondered why.

For what reason do people remove cold start?

Noise levels.