I got the missing parts and put my E53 back together after replacing the idle control valve, MAF, DISA and the intake boot. All brand new parts (VEMO, VDO and Rein).



I had to take it apart and put it back together after it idled high. After I put it together the second time it idles well at about 950rpm, but it throws "idle speed plausibility" codes instantly every time. It doesn't illuminate on the dash, but the Foxwell picks it up.





I logged data on the foxwell and the idle speed is pretty stable at about 950rpm. When I active-test it, it seems to work correctly (the test is to increase idle speed to 1500 rpm which it does). When I turn the AC on it goes down to about 850 rpm. However it seems like it is pretty solid other than that.



I haven't driven it much, only around the driveway and started it three or four times and idled it for a while. I'll test drive it later today. Anyone else know if this is a symptom of something else broken?

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2003 3.0 5MT Topasblau
Purchased in 2016 and sold in 2024
2012 35d Platingrau