KNOWN FAULTS · Toyota

Toyota Corolla (XII) 1.2 T common problems.

2019–2026 · Petrol

Sources are not verified in real time and no entry confirms that your car is affected.

3 known faults with sources

Applies if: Toyota USA tech tip for all its models: it applies if the judder began after wheels, pads or discs were removed or changed.

Brake judder from wheel nuts over-tightened or tightened unevenly (Toyota tech tip)Brakes

Engine / equipment: Any Toyota: it depends on how the wheels are tightened
Period mentioned: 2016 tech tip for all its models
Symptoms: Vibration in the steering wheel and the pedal when braking, even gently and at any speed, often shortly after wheels, pads or discs were changed.
Possible cause described: Toyota points out in a tech tip that if the wheel nuts are over-tightened or tightened unevenly (a single one is enough), the brake disc is left with runout and brake judder appears. It happens above all when they are run fully home with an impact gun instead of a torque wrench in a star pattern.
Check for the garage: Ask the garage to loosen and re-tighten the nuts with a torque wrench, to the manual's torque and in a star pattern, and to measure whether the discs have been left warped; if so, they will need skimming or replacing.
Cost cited in the source: No verified estimate; ask the garage for a quote.A rough figure from the original database, not an up-to-date quote.

Ignition coils and carbon on the 1.2 turbo (8NR-FTS)Engine

Engine / equipment: 1.2 turbo petrol (8NR-FTS): Auris, C-HR and Corolla
Period mentioned: 2015–2022
Symptoms: Poor acceleration and strong jerking, misfires and limp mode; at high mileage, loss of power and higher consumption from carbon on injectors, valves and intake.
Possible cause described: The coils fitted up to mid-2018 have a suspected manufacturing defect; Toyota usually replaces them as goodwill. Direct injection encourages carbon build-up.
Check for the garage: Read misfire codes and check the coil date; ask for a goodwill replacement; clean the intake if there are deposits.
Cost cited in the source: No verified estimate; ask the garage for a quote.A rough figure from the original database, not an up-to-date quote.

Applies if: Weak points of this model from inspections, breakdown statistics and recalls; anything specific to one engine is stated in the sheet.

Battery, rear brakes, brake servo and eCall on the Corolla (from 2019)Known weak points

Engine / equipment: Toyota Corolla (2019 onwards: 1.2 turbo and hybrids)
Period mentioned: 2019 onwards
Symptoms: A starter battery that fails early on the first cars; seized and rusty rear brakes, especially on hybrids; a brake servo that can fail on 2019 cars (more pedal effort); an eCall that does not activate.
Possible cause described: The brake-servo pump is replaced under warranty or goodwill. A recall for the eCall on cars built 2018 to 2021.
Check for the garage: Check the campaigns by VIN; brake hard now and then to clean the rear discs; test the battery.
Cost cited in the source: No verified estimate; ask the garage for a quote.A rough figure from the original database, not an up-to-date quote.