The most common signs of bad mass air flow sensor (MAF) in BMW Z4 are loss of power or slow acceleration, engine hesitation or jerking during acceleration, erratic idling, misfires, poor exhaust emission values and sometimes black smoke comes out of the tailpipe. The mass air flow sensor is part of the engine’s intake system and is located by AlanJ » Sun Feb 01, 2015 8:15 pm. The soft top not latching in the open position was a common problem on early E85s and was subject of a BMW TIS update. In later versions (not sure of the exact date) the latch was removed. I have the same issue and when possible just push the roof down and the latch connects. bladeowner. Before you have a nervous breakdown you need to get it diagnosed - get the dealer to sort it - alternatively take it to an Indy ( charge a lot less than BMW - usually around £40 ) this will identify the problem - 9 times out of ten it's one of the sensors located in front of the brake servo - a common fault - happened with mine - lights came on intermittently until finally stayed on - after 14 posts · Joined 2014. #15 · Aug 7, 2014. Just an FYI regarding the 2004 BMW Z4 fuel pump recall: Recall Date: May. 11, 2004. Recalled Component: Fuel pump. Manufactured by: Bayerische motoren werke. Date of Manufacturing: From Feb. 19, 2003 to Oct. 13, 2003. Sports cars and reliability are seldom terms you'll see in the same sentence. That's because sports cars live a harder life than most, pushed to their limits and often finding themselves in the 7. Lots of Luggage Room. Earlier, we mentioned how the E85 has a surprising amount of room up front for the driver and passenger. We’re pleased to report that this car is also sporting a surprising amount of room in the back as well. There is over 10 cubic feet of trunk space in the back. by srhutch » Thu Apr 30, 2009 10:25 pm. This post is to make owners of 2.5i, 2.5si and 3.0si Z4's about a known issue with the N52 engine (so also affects 3 Series etc) and the HVA's (Hydraulic Valve Adjusters) I have collected my car today from the dealer after having a complete new Cylinder head and internals replaced at a cost of over £ same problem. I have an '03 z4 3.0 with the SMG. EXACT same problem in that it will not shift up into 4th. I did a lot of research and have come to the conclusion that if I am lucky, it is the pump. But the hard part is finding someone that has the appropriate software that can set it up again. I am in central, California. Merced, to be exact. Pmn6.