The secondary air injection pump pushes fresh air into the exhaust stream during cold start, helping the catalytic converter reach operating temperature faster and reducing emissions.
If you notice any of the following, the part likely needs replacement:
Check Engine light with a secondary air system fault code
Failed emissions test
Whining or grinding noise from the pump on cold start
Installation information
Bolts to the engine or bracket, and connects to the air injection hoses and electrical harness — check hose connections are secure after installation.
Frequently asked questions
Typically only for a short period right after a cold start, while the catalytic converter is warming up — it shuts off once operating temperature is reached.
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Ilmars K.
August 2026
★★★★★
I ordered a Heater Blower Motor Resistor for a Toyota Avensis. Delivery took eight days from Latvia to Ireland. I installed it, and everything works perfectly. I wish this company success.
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Aleksandr L.
Toyota Avensis
August 2026
★★★★★
No complaints about Evro Trans itself, everything's fine. But the delivery..... It felt like the order was being carried by turtles. 4 days from Riga to Daugavpils. Judging by the tracking, the parcel just sat somewhere behind a shed for 3 days, then they found it and delivered it the next day. I think that's why I won't be ordering there again.
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Paul F.
June 2026
★★★★★
Super fast delivery of the part, and good quality of the used part. Thanks for the service.
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Natālija I.
May 2026
★★★★★
I ordered antifreeze heaters and an auxiliary pump. Everything arrived quickly, the very next day, and matched the description. I'm satisfied.
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February 2026
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November 2025
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