Hyundai Parts Guides
Part numbers, fitment and common faults for Hyundai models — organised by model below.
The 7-Speed DCT Gearbox: A Genuine, Documented Weak Point in Specific Years
If you're looking at a used Hyundai fitted with the 7-speed dual-clutch automatic transmission (DCT) — most commonly paired with the 1.6 T-GDi petrol engine across the Tucson and related models — this is worth researching by specific model year rather than assuming it applies equally across the board. 2016-2017 examples in particular show a well-documented, recurring pattern of premature clutch pack wear: jerky engagement pulling away (especially on an incline or reversing), delayed response from a standstill, whining or grinding during gear changes, and in a genuine number of reported cases, complete transmission failure well within what most owners would consider normal life for the part. The root cause is generally traced to the electro-hydraulic actuator controlling clutch engagement developing leaks and calibration drift, compounded by inadequate cooling under sustained stop-start use. Repair costs are genuinely significant — replacement clutch packs alone run £800-1,200, with a full transmission rebuild reaching £2,500-3,800 — and Hyundai has extended warranty coverage to 10 years on some affected vehicles, though UK owners with import or ownership-history complications have sometimes missed out on this. If you're specifically looking at a 2016-2017 DCT-equipped Hyundai, a thorough test drive checking for any of the symptoms above, and confirmation of whether any warranty extension work has been carried out, is genuinely worth the time.
Older (Second-Generation, 2010-2015) Tucsons Carry a More Serious, Separate Engine Concern
Distinct from the DCT issue, older second-generation Tucsons fitted with 2.0 and 2.4-litre petrol engines have a documented history of premature engine failure, traced to a faulty connecting rod bearing that can cause sudden engine knocking, ticking, and in serious cases complete failure, typically once a car passes 150,000 miles. This was serious enough that Hyundai recalled almost 100,000 units and introduced a Knock Sensor Detection System to warn drivers if the symptom develops, giving them a chance to stop before catastrophic failure occurs. If you're looking at a high-mileage second-generation Tucson (broadly 2010-2015) specifically, confirming this recall work has been carried out is a genuine priority, not just a nice-to-have.
The Five-Year Warranty Is a Genuine Point in Hyundai's Favour
It's worth balancing the above against real context: Hyundai backs its cars with a five-year, unlimited-mileage warranty as standard — a genuinely strong position compared with most mainstream rivals — and independent reliability surveys have repeatedly placed Hyundai above brands including Mazda and Volvo for first-year fault rates. Third-generation Tucson models (broadly 2015-2020), particularly 1.6 T-GDi petrol paired with a manual gearbox, are widely regarded as offering the best balance of reliability and value across the range, and represent a sensible target if you specifically want to sidestep both the DCT concern above and the older engine issue.
Diesel-Specific Considerations
Older 1.6 and 2.0 CRDi diesel Tucsons have a recognised, relatively minor and inexpensive-to-fix issue with NOx sensor failure — triggering the engine management light and putting the car into limp mode. Hyundai has acknowledged this in Technical Service Bulletins, though it hasn't been treated as a full UK recall; a replacement sensor typically costs a few hundred pounds fitted, and this shouldn't be treated as a major reliability red flag, just a fairly common, manageable repair on older diesel examples.
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Each guide covers a specific part on a specific model, with fitment notes across generations, known failure symptoms, and honest advice on OEM versus aftermarket options.