Hyundai Tucson ix35: common faults & what to check

Which Hyundai Tucson ix35 are you looking at?

Pick the year and the engine. The faults below narrow to that exact combination, because a 1.8 and a 2.4 of the same car do not fail the same way. Free, no account needed.

Start your free check on this Hyundai Tucson ix35

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The checks worth doing on a Hyundai Tucson ix35 before you hand over any money. Every documented fault is listed below, each with its own page.

• Serious issue

  Check coolant reservoir level and colour for contamination or oily residue.

  See why

  EGR Cooler Seal Failure – Coolant Loss & White Smoke

  The D4HA 2.0 CRDi engine EGR cooler internal seals deteriorate under repeated thermal cycling, allowing coolant to enter the EGR circuit and intake manifold. This produces white or grey exhaust smoke, a sweet coolant smell from the exhaust, and gradual coolant loss with no visible external leak. Left unaddressed, coolant ingestion into the combustion chamber risks hydrolock and severe engine damage including head gasket failure and bent connecting rods.

  What you would notice

  • White or grey smoke from exhaust particularly on startup or under load
  • Sweet coolant smell from exhaust pipe
  • Coolant level dropping without any visible external leak
  • Coolant reservoir needing regular top-up between services
  • Oily or discoloured residue inside intake manifold passages

  Typically $1,200–$3,200 to put right.

• Costly issue

  Scan for DPF differential pressure fault codes P2002 and P244A.

  See why

  D4HA DPF Blockage from Urban Short-Trip Driving

  The diesel particulate filter on the D4HA 2.0 CRDi requires sustained driving above 60 km/h at elevated exhaust temperatures to complete passive regeneration and burn accumulated soot. Vehicles used predominantly in urban stop-start conditions accumulate soot faster than passive regeneration can clear it, triggering forced active regeneration cycles that inject extra fuel into the exhaust. If active regeneration also fails to complete due to short trips being interrupted, full DPF blockage results in limp mode and power loss. Neglected blockage leads to DPF substrate cracking, engine oil dilution from excess fuel injection, and potential catalytic damage.

  What you would notice

  • DPF warning light illuminated on instrument cluster
  • Significant loss of power or limp mode activation
  • Fuel consumption increase from repeated failed regeneration cycles
  • Engine oil level reading above maximum mark due to fuel dilution
  • Excessive white smoke during active regeneration at highway speed

  Typically $700–$3,500 to put right.

• Costly issue

  Check oil level against service history and note interval between top-ups.

  See why

  Theta II G4KD Piston Ring Excessive Oil Consumption

  The Theta II G4KD 2.0L petrol engine is subject to a documented piston ring design defect causing excessive oil consumption, often exceeding 1 litre per 1,000 km between services. Hyundai issued a warranty extension program in multiple markets including Australia and New Zealand covering Theta II engine families for piston ring failure and connecting rod bearing damage up to 150,000 km or 10 years from sale. Oil starvation from unchecked consumption leads to catalytic converter damage from burning oil and, in severe cases, bearing failure or engine seizure.

  What you would notice

  • Oil consumption exceeding 0.5 L per 1,000 km
  • Blue-grey smoke on cold startup or under hard acceleration
  • Fouled spark plugs from oil burning
  • Catalytic converter damage or sulphurous smell from exhaust
  • Low oil pressure warning light at higher mileages

  Typically $2,800–$8,500 to put right.

• Costly issue

  Check current oil level and compare against last service record to estimate consumption rate.

  See why

  GDI Piston Oil Ring Flutter – Blue Smoke & Consumption

  The G4KD and G4NA 2.0-litre GDI petrol engines are documented to suffer from piston oil control ring flutter under low-load low-RPM driving conditions. The rings lose tension and fail to scrape cylinder walls effectively, allowing oil to pass into the combustion chamber and burn. Affected engines typically consume one litre or more per 1000 km. The defect is linked to a Hyundai and Kia class action in multiple markets and was acknowledged by the manufacturer in technical documentation.

  What you would notice

  • Blue or blue-grey smoke from exhaust on cold startup or deceleration lift-off
  • Engine oil consumption exceeding one litre per 1000 km
  • Oil level dropping between services with no visible external leak
  • Spark plugs showing oil fouling deposits on inspection
  • Catalytic converter degradation from oil contamination

  Typically $2,800–$8,500 to put right.

• Costly issue

  Check rear coupling unit housing for moisture ingress and actuator motor resistance.

  See why

  Rear AWD Coupling Actuator Motor Failure

  LM ix35 AWD variants use an electronically-controlled rear coupling unit to distribute torque to the rear axle on demand. The coupling actuator electric motor is prone to failure from moisture ingress and brush wear, causing the system to default to front-wheel-drive only. The AWD fault warning illuminates on the instrument cluster and rear torque delivery ceases. The coupling unit or actuator motor assembly typically requires replacement as a complete unit rather than internal repair.

  What you would notice

  • AWD or 4WD error warning light on instrument cluster
  • Loss of rear-wheel drive engagement
  • Vehicle behaving as front-wheel drive only in conditions requiring AWD
  • Grinding or whirring noise from rear differential area under load
  • AWD warning appearing intermittently before becoming permanent

  Typically $900–$3,500 to put right.

• Costly issue

  Test drive at steady 60-90 km/h on flat road holding constant throttle.

  See why

  A6GF1 6-Speed Auto Torque Converter Lock-Up Shudder

  The A6GF1 6-speed automatic transmission fitted to the ix35 and Tucson LM exhibits torque converter clutch shudder felt as a vibration or judder in the drivetrain at steady cruise speeds between 60 and 90 km/h when the converter lock-up clutch is partially engaged. The fault is caused by degradation of the transmission fluid friction modifier additives and wear of the lock-up clutch friction material over time and mileage. Hyundai issued an updated transmission fluid specification and flush procedure as the primary remedy; persistent shudder after fluid change indicates clutch friction material damage requiring torque converter replacement.

  What you would notice

  • Vibration or judder at steady 60-90 km/h cruise speed
  • Shudder disappears immediately on light acceleration or deceleration
  • Sensation similar to driving over fine rumble strips
  • Shudder more pronounced when transmission fluid is old or degraded
  • No shudder at lower town speeds or higher highway speeds

  Typically $400–$3,200 to put right.

What these repairs cost on other cars

Some of the Hyundai Tucson ix35’s documented faults are repairs other models share. Each page lists the documented NZ cost for every model it affects.

• DPF Repair and Replacement Cost
• Diesel Injector Replacement Cost
• EGR Valve and Cooler Repair Cost

Other Hyundai models