An error indicating that the air mass meter is faulty, which is quite common for the E39 M5, is twice as bad for a the driver of that M5.
Why? The M5 has two air intake hoses it also needs two air mass meters.

Though this is the engine of a E60, you can see how it has two airmassmeters

Often only one of the airmass meters is actually faulty though. You can save some money by just buying one air mass meter and trying out which one is really broken. (more…)

The MAF-Shop offers now an OEM airmass meter by Pierburg (7.22184.50.0) which fits the 2.5 l turbo diesel (td) and intercooled turbodiesel (tds) engines, that were used in the BMW (M51D25) E36, E34, E39 and the E38, as well as in the Vauxhall (also known as Opel) Omega B (25DT).

Especially the 5-series E39 525tds, 525td and the 3-series E36 with the 325td version, were some of the most popular BMW diesel models, so I’m sure a lot of the turbodiesel-enthusiasts will be happy about this cheap offer:
The PIERBURG MAF 7.22184.50.0 costs €179.90 (+shipping cost) and can be ordered through this link:

PIERBURG Air mass meter 7.22184.50.0 for 179.90EUR

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Since there has been a lot of confusion about the Bosch air mass meters 0 928 400 527 ( and 0928400468) and 0 928 400 314, I want to explain the details.
For almost all BMW models with diesel engines (to be more exact, we’re talking about the 3-series/E46 320d, 330d, the 5-series/E39 520d, 525d, 530d and the 7-series E38 730d) the airflowmeter model was changed in November 2000 and August 2001.

The Bosch air mass meter 0928400314 was replaced by the improved 0928400468, which has an additional protection net and a different characteristic curve. This means that all models that were built before the dates have the old 0928400314 (there is a detailed list at the end of the post). (more…)