Vauxhall Astra common faults, MOT red flags & buyer's guide
Astra K (2015–2022) & Astra L (2022–) · Hatchback / Estate
Cheap and comfortable — but the 1.6 CDTi diesel needs DPF care.
Vauxhall Astra common faults
Each fault below is drawn from real owner reports and UK garage patterns for this generation — not generic used-car advice.
1.6 CDTi DPF blockage
seriousShort-trip use blocks the DPF, triggering limp mode and expensive regens.
Check for: Ask about typical use. Any 'exhaust' advisories?
Typical cost: £400–£900 forced regen or clean; £1,500+ replacement
1.4 turbo water pump
moderateWater pump fails around 60–80k miles.
Check for: Coolant traces, sweet smell.
Typical cost: £250–£450
Infotainment glitches
minorAstra K IntelliLink can freeze or lose Bluetooth.
Check for: Test on the drive.
Typical cost: Software update at Vauxhall
MOT history red flags
If any of these appear on the last two MOTs, negotiate hard or walk away.
- Emissions failure on diesel
- Recurring EGR-related advisories
Sharp questions to ask the seller
- Water pump replaced?
- Diesel: is it used for short journeys?
Got a specific Vauxhall Astra in mind?
Paste the reg and we'll pull its full MOT history, cross-check against these faults, and tell you: buy, negotiate or walk away.