Need to replace secondary air pump on my b5 S4.

ECS tuning website has it for $395 with the part #078906601H

http://www.ecstuning.com/Audi-B5_S4-...Pump/ES251956/

I found bosch secondary air pump on other websites like AutoParts Warehouse that say it is an exact fit for B5 S4 for $315 however the part number is completely different. Part # W0133-1597546

http://www.autopartswarehouse.com/sk...%26+Drivetrain

Are these comparable, completely the same?? and what are your recommendations. Thanks

 

I just unplugged mine. It is embarrassing to hear it whining when the car starts cold.

I'm not gonna pay $400 to fix it just to turn off my check engine light. I'll wait till I get a custom tune and have it tuned out of the program.

 

Don't have a choice here. Tripped CEL and it needs to be fixed in order to pass NY state emissions inspection. I just need to know if even though the part numbers are different I should trust the cheaper site or just go with ECS.

 

whats funny is that it only pumps air into the cats when the car is cold. no one measure emissions on cold start, only once the car is warmed up. So it's not really affecting anything. It's stupid to have a pump to blow air into the cats to lean out the rich mixture when the car is cold.

so a CEL can fail a test regardless? Get some electric tape and cover the light.... lol