The "20,000 mile" filter on my car was much worse than that. It was completely black.
The car had previously been serviced at a main dealer not far from my location, although I now think they are under different ownership than they were at the time of my cars service.
The car was on 60,000 miles when I bought it and I don't think it had ever been changed.
Yes, fiddly to change the air filter and a daft location. Mine hadnít been done in a long while. And I wonder how long the three tiny screws holding the cover on last before going rusty and seizing. As a 916 owner Iíve experienced that pain.
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