The Toyota faults that actually come through the workshop door — what causes them, the order to test in, and what an honest independent garage should charge.
These are the Toyota faults we see most often in the workshop, each with the real cause on Toyota engines, the order to test in, and an honest independent-garage cost rather than a dealer estimate.
Toyota problems explained
- Toyota 1.4 D-4D Rough Idle — A 'tractor at idle' rough running on the Toyota 1.4 D-4D is the classic Denso injector failure — the copper sealing washers leak and combustion gas blowback carbons up the injector seat. Caught early it's a £150 fix; ignored it's a £600 head seat repair.
Symptoms overlap between makes, but the likely cause does not. Knowing which component fails first on a Toyota is what stops good parts being replaced on guesswork — always pay for the diagnosis before you pay for parts.