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View Full Version : airconditioning microfilter introduction date



shogun
01-22-2011, 12:57 PM
As this question comes up again and again, here the official information.

Models: all except E30

All vehicles produced 09/1991 or later (except the E30) are equipped 100% with the microfilter.

In addition all E31 vehicles have been equipped 100% with 2 microfilters since their start of production.

Vehicles with the microfilter are supposed to have a red "Maintenance Reminder" decal in the glove compartment.
However, on vehicles produced during 09/1991 - 05/1992, many of the labels were inadvertantly left off. These vehicles are, however, equipped with a microfilter.

Some vehicles produced prior to 09/1991 may be equipped with a microfilter,
and can be positively identified by the presence of the "Maintenance Reminder" decal in the glove compartment.