They are a nuisance but I didn't like the check engine light being on. So thanks to Peterbrit I got it on ebay from his low mileage '02. The filter for the air pump was quite degraded with an oily substance when I happened to check it just before it failed. Just wonder if yours was the same? It also had a bit of water in it when I took it out and I think the pump failed when the water froze. [I took it out on an above freezing day but temps had been below freezing before that day. They don't seem to be going down in price. :shock: