D-4D diesel injector seal leaks causing white smoke on start-up
- Typically appears
- 80,000+ miles
- What to inspect
- Check for white smoke on cold start and inspect for oil-diesel mixing on the dipstick

A 2012 Toyota Avensis is now 14 years old, so an average example has covered around 189,000 miles. An early car in the generation · most of the launch teething issues were still being worked through, so recall completion and dealer rectification history matter. Check the state safety inspection and service history alongside the documented faults below, which are sorted by whether a 2012 car has usually reached the mileage where they appear.
Compiled & reviewed by the VehicleFaults Research Team
The 2012 Toyota Avensis is 14 years old, so an average example has covered roughly 189,000 miles. At that mileage 6 of the documented faults are already due, so check those first.
Documented onset mileage is at or below the ~189k miles an average 2012 car has covered.
D-4D diesel injector seal leaks causing white smoke on start-up
Front lower arm bush wear causing clonks over bumps
Rear brake caliper seizing from infrequent use
Electronic Parking Brake (EPB) actuator failure causing the rear brakes to bind or fail to engage, accompanied by a dash warning message.
Valvematic controller failure on 1.8 and 2.0 petrol models, triggering limp mode, engine management light, and VSC warnings (code P1047).
Wear in the steering column intermediate shaft universal joint, causing a noticeable clunk or knock during low-speed turning.
Age, electronics and build-related issues that are not mileage-driven.
Multimedia touchscreen unresponsiveness on Icon and Excel trims
Rear wheel arch and sill corrosion on early examples
Generate a tickable pre-purchase checklist for this exact year, mileage and variant · add photos and notes as you inspect.
Check this exact carYes, it has a strong reputation for dependability with few serious mechanical faults.
Injector seal leaks can occur, so check for white smoke on a cold start before buying.
The 1.8 petrol is mechanically simple and very dependable if lower running costs are not essential.
Some early examples show sill and arch corrosion, so inspect these areas on higher-mileage cars.
All petrol engines and the early Toyota-built 2.0 and 2.2 D-4D diesels utilise a timing chain, which is generally maintenance-free. The later BMW-sourced 1.6 and 2.0 diesels introduced from 2015 also use a timing chain, though these require strict adherence to oil change intervals to prevent premature tensioner wear.
The Multidrive S is a CVT paired with petrol models. It is highly robust provided the transmission fluid is replaced every 40,000 miles. During a test drive, ensure acceleration is smooth without juddering or hesitation. Any whining noises under load typically indicate neglected fluid changes or internal bearing wear.