Subaru Impreza Common Problems & Known Faults (UK)
If you are considering buying a used Subaru Impreza, there are several major reliability issues worth knowing about first. Our garage database tracks 3 known faults for this model, 2 of them rated high severity. Every one below is a repair bill a seller has good reason not to mention.
Are you about to buy a lemon?
Sellers rarely admit these faults outright. Our database tracks 9 specific phrases sellers use in adverts to soft-pedal these exact issues. Paste any Subaru Impreza advert and we will check it in seconds.
Notorious head gasket failure leading to external oil/coolant leaks or internal overheating
Rough guide
£1000-2000
Typical symptoms
oil leaking from the bottom of the cylinder heads
overheating gauge
white smoke from exhaust
coolant mixed with oil (milky oil)
Affected vehicles
Engines:
2.5 Litre Boxer (EJ25)
Typical mileage:
80000-120000 miles
🔍 We have a specific pre-purchase check for this faultCheck an advert →
Subaru Impreza GC8 / GD (1992-2007) problems
Bodywork/ChassisMedium severity💬 Owner reports
The rear wheel arches and quarter panels rot from the inside out: moisture gets trapped by sound-deadening material inside the quarter panel, blocked drain holes, and the rubber trim along the arch lip, so by the time paint bubbles on the outside the metal behind is far worse. A proper repair means cutting well back behind the wing rather than patching the lip, and on sought-after classic and performance versions a rotten quarter is the single biggest value killer.
Rough guide
£300-1500
Typical symptoms
paint bubbling or blistering around the rear arch lip
rust staining from under the arch trim
filler or rippled panel faces from a previous patch repair
Affected vehicles
Engines:
All
Typically appears:
12-25 years
🔍 We have a specific pre-purchase check for this faultCheck an advert →
Bodywork/ChassisHigh severity💬 Owner reports
Rot around the rear strut turrets where the strut top meets the inner arch, caused by the factory seam sealant around the joint failing and letting water sit in the seam. This is the structural one: it carries the rear suspension, it is an MOT failure, and a bad case means removing the outer wing and replacing the whole turret on a jig so the suspension geometry stays true. Owners call it the killer because a car with shiny arches can still be rotten here.
Rough guide
£500-2500
Typical symptoms
rust staining or flaking around the rear strut tops, seen from inside the boot
bubbling where the inner arch meets the turret
MOT advisories for corrosion near a suspension mounting
damp boot carpet on the affected side
Affected vehicles
Engines:
All
Typically appears:
15-30 years
🔍 We have a specific pre-purchase check for this faultCheck an advert →
Subaru Impreza service intervals: cambelt, chain and gearbox oil
An overdue cambelt is the most expensive thing a seller can fail to mention on a used Impreza. These are the figures UK specialists work to.
Timing belt (cambelt)Belt
2.5 LITRE, EJ25, 2.0 LITRE, EJ20
60,000 miles or 5 years, whichever comes first
Subaru EJ-series boxer engines use a timing belt. The interval in the UK is strictly 60,000 miles or 5 years. It is an interference engine. The tensioner, idlers, and water pump must be replaced at the same time.
Always confirm against the vehicle handbook. Intervals vary by engine, and several manufacturers revised theirs after failures in service.
Repair costs are typical UK ranges, not quotes. Actual cost depends on condition and garage.Data last verified: August 2026
Where this Subaru Impreza fault data comes from
If you used to check the Honest John “Good & Bad” section before the site closed in 2026, this page is where that information now lives. We rebuilt the Subaru Impreza owner-report history from the archived Honest John dataset, added our own research, specialist and owner-club sources and DVSA recall data, and we keep it free. Each fault above is badged with its source. The same data feeds our free advert check, which reads a listing against every known fault for the exact engine and year.
Knowing what a Subaru Impreza goes wrong with is half of it. The rest is reading the advert and checking the car's history before you hand any money over.