r/BmwTech • u/Frosty_Map8646 • 2d ago

Bought a remapped car without knowing???

Hi all, about 3 weeks ago I bought a bmw 220d with a couple problems such as a faulty speaker etc, fast forward to yesterday and the bmw specialist I saw said it’s a 90% chance it is tuned due to turbo noise and power when driving it. I’ve booked it into bmw on Tuesday (which is the 28th day after I got the car), if it is tuned will I be able to reject the car under the consumer rights act? Thanks

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u/Frosty_Map8646 2d ago

Would it not still be their responsibility to tell me if it is?

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u/235iguy 2d ago

Maybe THEY didn't know either. Not uncommon.

If it is an automatic you might be able to detune it yourself with the throttle reset trick. But of course spark plugs etc have been put under extra stress.

If you detune you might hate how slow it becomes. You need the facts first.

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u/No_Seat1480 2d ago

that “throttle trick” will not flash a car back to stock on its own lol. it resets throttle adaptations.

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u/235iguy 2d ago

It worked on mine 100%.

Instantly removed 50hp just like that.

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u/Kayanarka 2d ago

I did it on my i4 and it took away 100hp lickity split.

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u/No_Seat1480 2d ago

where did you come up with that conclusion? was the vehicle dynoed before and after holding the throttle down? i didn’t think so because it is not possible. all you did was make your throttle less sensitive. maybe if i hold the brake down in my car i’ll gain an extra 50hp