A few weeks ago, I posted about problems with hesitation in the morning on a cold start that would go away after 1/2 mile of driving. It finally got to the point where my SES light came on and I pulled the Peake reader to get oodles of codes, all mainly pointing to an MAFS problem (all sorts of misfires on warm-up as well). I had cleaned them earlier with the method provided on this board, but I guess that wasn't enough (hopefully it didn't foul them more!).
I took it to Continental Imports over here (BMWCCA recommended) and they ran tests to make sure it wasn't a catalytic converter problem.. and sure enough it was the MAFS. They gave me two choices.. replace the MAFS at $350 or something per sensor, or replace the capsules (Bosch OEM parts.. can't do this at a dealer) for $150 each. He gave me the same warranty on both options, and said there was no reason to replace the full sensors. When he called me, he said that the new capsules had already been installed in my car and the difference was "night and day." There were also crankcase ventilation system hoses that were fouled by oil and were cracked.. one of them had split in two.
They've had my car for two days since they've been waiting for the hoses to come in, but it should be back this evening. I'll definitely be posting back here with impressions and part numbers as I can get them.
I took it to Continental Imports over here (BMWCCA recommended) and they ran tests to make sure it wasn't a catalytic converter problem.. and sure enough it was the MAFS. They gave me two choices.. replace the MAFS at $350 or something per sensor, or replace the capsules (Bosch OEM parts.. can't do this at a dealer) for $150 each. He gave me the same warranty on both options, and said there was no reason to replace the full sensors. When he called me, he said that the new capsules had already been installed in my car and the difference was "night and day." There were also crankcase ventilation system hoses that were fouled by oil and were cracked.. one of them had split in two.
They've had my car for two days since they've been waiting for the hoses to come in, but it should be back this evening. I'll definitely be posting back here with impressions and part numbers as I can get them.