Is it dangerous to drive with a faulty air pump?

Not critical for safety, but it can cause a failed emissions test and, over time, contribute to a less efficient catalytic converter — repair when convenient.

What causes the pump to fail?

Most commonly wear of the internal motor bearings or moisture ingress from condensation, especially in pumps that run only briefly and infrequently.

What is the pump made of?

An electric motor and impeller in a compact housing.

What is this part and what does it do?

Full description available in the product description section above. Contact us with clarifying questions.

How do I tell if my part is faulty?

See the 'Signs of a faulty part' section above or run a diagnostic at an auto service.

Yes - all our used parts are tested before sale and sold with guaranteed quality.

When should the part be replaced?

When warning signals appear, diagnostic codes are present, or the system malfunctions.

Secondary air pump VW PHAETON 2003

Name: Secondary air pump VW PHAETON 2003
Brand: VW
SKU: 3D0131083C
Price: 36.00 EUR
Availability: InStock

OEM: 3D0131083C

Disassembled car photo

Engine running

Tested before shipping
Guaranteed quality
Fast delivery 3–7 days
14-day returns

What is this part and why does it matter?

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.

Ask a question

Not sure about compatibility? Send us a question with your car's make, model and year.

Ask about this product

Signs of a faulty part

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.

Donor vehicle description

VIN: WVWZZZ3DZ48007275
Make, model: VW Phaeton
Year: 2003
Engine: Petrol 3.2 177KW AYT
Transmission: Automatic GML
Drive: Front
Equipment: LHD
Colour: G4R

349 parts from this car

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.

What our customers say

All reviews →

Price: affordable. Service: electrical equipment repair.
A
Andris B.
September 2026
Price: excellent.
D
Didier V.
August 2026
Super good! They came through with the part I needed, quickly and at a fair price! Thanks, and I definitely recommend!
I
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.
A
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.
P
Paul F.
June 2026
Super fast delivery of the part, and good quality of the used part. Thanks for the service.
N
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.
J
Juris J.
February 2026
Excellent service, timely delivery, and complete transparency at every step. I highly recommend EvroTrans to anyone looking for a reliable partner!
E
Egor S.
November 2025
Bought a front fender for my car. I liked it! After payment they sent more than 20 photos of the problem areas, and it was packed very securely - took a while to unwrap.
I
Igors K.
Front fender
October 2025