Secondary air injection malfunction on SEAT — older Ibiza/Leon 1.6/1.8 petrol SAI pump seizure.
SEAT P0410 — Secondary air injection malfunction on SEAT — older Ibiza/Leon 1.6/1.8 petrol SAI pump seizure. Typical UK independent garage cost: £140–£480.
What actually causes P0410 on a SEAT
SEAT P0410 — VAG-shared SAI. Pump, check valve, hoses degrade together. Replace as a set.
SEAT engines that log P0410
- 1.6 BSE (Ibiza/Leon)
- 1.8T AUM/AWP
How we diagnose P0410 on a SEAT
- VAS/VCDS SAI activation
- Pump current
- Check valve inspection
- Full set replacement
The common misdiagnosis to avoid
Older Leon Cupra 1.8T SAI is often deleted by previous owners — re-fitting properly is the only MOT-safe fix.
SEAT P0410 repair cost in the UK
Expect £140–£480 including parts and labour at an independent garage. Main-dealer quotes on SEAT are usually higher for the same job, and the spread exists because the cheap cause and the expensive cause throw the same code — pay for the diagnosis before you pay for parts.
Bob's workshop tip
Leon 1.8T P0410 — pump + check valve combo job.
Codes usually seen alongside P0410 on SEAT
- P0411
Symptoms drivers report with P0410
- A loud 'vacuum cleaner' or 'jet engine' noise from under the bonnet for the first 60 seconds after a cold start.
- A sudden drop in revs or a slight stumble just as the air pump shuts off.
- Engine management light (EML) glowing amber, often appearing a minute after driving off from cold.
- A strange 'mooing' or clicking sound when the engine is idling during warm-up.
- The car failing its MOT on the 'Major' defect of having an active EML, even if the emissions are actually okay.
Repairs that clear P0410
- Replace air pump
- Clear or replace hoses
- Replace check valve
For the generic, all-makes explanation of this code — meaning, every known cause and UK cost bands — see our P0410 guide.