2006 325i E90 Steptronics Behaviour

cannon · Apr 13, 2013

Hi there

Need some advices on steptronic:

1) normal behaviour of steptronics when simulating down shifting and car is stationery. Should it be M6 5 4 3 2 1 or M6 1? Tried several times and yielded either of the sequence. Not too sure which should be the expected result.

2) also tried upshifting several times and yielded different results. I was expecting M1 2 3 4 5 6 to be the expected result but now and then, it doesn't shift up in sequence. Gotten all sort of other sequences like 1 3 5 6, 1 2 4 5 6, 1 4 6, etc.

3) there are times whereby the gears could not be up or down shifted when moving. Just earlier, the gear was at m4 and rpm was at 4.5k but couldnt be up or down shifted. Anyone encountered the same problem and what could be the issue/s?

Thanks.

Baby1M · Apr 13, 2013

Re: 2006 325i E90 Steptronics Behaviour

With regard to Steptronic behaviour...

1) Stationary after coming to a stop or after starting up the engine and have not moved?

- For the former, the gear should be at 2 upon stationary. So if stationary now, we change to sports mode or use the steptronic to down shift, it just shows '1'.... try shift down again it will remain as '1', down again and it will still be '1'.

- For the latter, it is in gear 2 (auto) and if use the steptronic to down shift, it should show '1'... try shift down again it will remain as '1', down again and it will still be '1'.

- In stationary mode, if we manually shift up, it shows 2,3,4,5,6. From here, if we down shift, it will show 6,5,4,3,2,1.

2) Never happened to mine. Did u change any loading on the accelerator in the entire process?

3) Never happened to mine. Could be an issue of electronics.

Note:
There is approximately a 0.5sec (max) lag before there is an actual gear change after we hit the down or up once so hitting it twice in succession can sometimes result in the gearbox double shifting or jump straight to the latest input - Applies to driving.

Red_Bean_Bun · Apr 13, 2013

Re: 2006 325i E90 Steptronics Behaviour

mine shift quite fast. but if you are at 6k rpm at 4 ...... should not be able to shift lower ......

998 · Apr 14, 2013

Re: 2006 325i E90 Steptronics Behaviour

Good to see the last few 325 here... I do not have these issues either. In fact I could smoothly shift up and shift down or drag on my preferred gears or hold it as long as I want... I drive 85% of my time on steptronics whenever I could...

vexxus · May 17, 2013