As has been previously posted on here, Wells is not manufacturing their MAF sensor any more. However, if you order a Wells SU145 MAF sensor through World Discount, you get a brand new Bosch MAF in a Wells box for $161.00 with a limited lifetime warranty. When I called Wells to see why I got a Bosch, they confirmed they are substituting new, not rebuilt, sensors because they are currently no manufacturing their version. She didn't know why they weren't producing them. Seemed like a pretty good deal for a brand new one.

 

Bosch mass air flows have yet to be desired. Thats really bad considering they have been around since 1985. The best thing about those is that you can remove them.