r/G20BMW

▲ 3 r/G20BMW

B48 330i Transmission Issues

Hi there,

Over the weekend I went on a trip and was driving for 6hrs. During this I started to notice my transmission acting a bit strangely. Usually when slowing down for a roundabout the gearbox downshifts but on a number of occasions I was almost at a stop and the transmission was still in 6th gear which did not seem right to me. There was also a few questionable shift that seems too early or late.

Not sure if this is connected but at cruising speed I could feel a buzzing vibration through the chassis which is new. It did not feel like a wheel balance issue. What could be up with my Transmission and could an issue with this cause a vibration. Car has 48K Miles.

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u/Shoddy_Army_2271 — 3 days ago
▲ 2 r/G20BMW

anyone want a bm3 license for g20 330i

my car got totaled, i have 3 days til it leaves, can transfer it to your email. it’s currently on 2021 330i xdrive. any offers welcome

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u/ZestycloseOlive9654 — 6 days ago
▲ 1 r/G20BMW+1 crossposts

Gen3 b48 ECU unlock?

Does anyone think the gen3 ECU’s will be able to be unlocked within the next 6 months? Because if I cant tune my 330i soon i’m thinking of just buying a salvaged m340 or m3.

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u/Turbulent_Bell_5156 — 12 days ago