Hyundai Trajet FO

First-gen two-litre diesel, proven and tough. Early injectors and the turbo are the known weak spots.

• !! Common-rail injector wear from 150,000 km

  Common-rail injectors on the early 2.0 CRDi wear at high mileage. Fuel quality and service intervals are critical for longevity.

  Symptoms: Rough running at low RPM, cold start problems, white smoke, increased fuel consumption.
  600–2,000 $
  Ad D4EA fuel injector2.0 CRDi fuel injector Santa FeBosch CR fuel injector Hyundai
• !! Turbocharger failure from 150,000 km

  The D4EA turbocharger wears prematurely, especially with neglected oil maintenance. Turbo failures are well documented in forums; a second turbo within a few years is not unusual.

  Symptoms: Severe power loss, whistling or rattling noises from the turbo area, blue exhaust smoke, increased oil consumption.
  800–1,800 $
  Ad turbocharger D4EA28200-4A101VGT Turbo CRDi 2.0
• !! Head gasket failure from 200,000 km

  At higher mileages or after overheating events the head gasket can fail. Coolant enters the oil or vice versa; engine damage is imminent if driving continues.

  Symptoms: White smoke from exhaust, coolant level drops without visible leak, mayonnaise-like deposits on oil filler cap, overheating indicator.
  1,200–2,500 $
  Ad cylinder head gasket D4EAhead gasket 2.0 CRDi Tucson20910-27840

+ 2 more engine weaknesses + vehicle weaknesses

Tough two-litre NA from the Sirius family. Simple tech, trouble-free as long as the oil gets changed on schedule.

• !! Sirius timing belt — critical maintenance interval from 90,000 km

  The Sirius G4JS engine uses interference timing belt drive. Change interval: 90,000 km. Many used vehicles are on the road with an overdue belt.

  Symptoms: Engine suddenly no longer starts; no compression; possible crunching on failure.
  350–700 $
  Ad G4JS timing belt kitSirius 2.0 timing belt Sonata TrajetG4JS timing belt water pump
• !! Timing belt failure with valve damage from 90,000 km

  The G4JS Sirius II is an interference engine — if the timing belt fails, pistons contact valves and bend them. One documented case showed belt failure after 34,000 km of a newly installed belt, with 8 bent valves.

  Symptoms: Sudden engine stop without warning, then no restart, no compression in affected cylinders
  600–2,500 $
  Ad timing belt G4JStiming beltsatz Hyundai Santa Fe 2.0 Sirius II
• !! Oil seal ageing leaks from 130,000 km

  Older Sigma/Delta V6 engine tends to oil leaks at valve cover gaskets and camshaft seals at high mileage. Labour-intensive disassembly due to the tight V6 packaging.

  Symptoms: Oil stains under the vehicle, oil smell, dropping oil level.
  250–800 $
  Ad G4JS valve cover gasketSigma V6 valve cover gasket

+ 4 more engine weaknesses + vehicle weaknesses

Six-cylinder that likes to rev. Chain-driven, moderate upkeep costs for a V6.

• !! Timing Belt Failure — Interference Engine from 90,000 km

  The G6BA is a DOHC interference engine with a timing belt. A belt failure inevitably destroys the valvetrain on both cylinder heads. The 90,000 km / 6-year service interval is frequently exceeded on used vehicles.

  Symptoms: Sudden engine cutout without warning, no restart possible. After the break, engine noise is typical on attempted start.
  2,000–5,000 $
  Ad timing beltsatz G6BAtiming belt kit 2.7 V6 Santa Fe Sonata24312-37110
• !! Water Pump Belt Drive Leaks from 90,000 km

  The belt-driven water pump on the 2.7L V6 leaks at the shaft seal. Coolant can drip onto the timing belt and trigger belt failure. Preventive replacement at every belt service is mandatory.

  Symptoms: Coolant loss without external leak, coolant staining in the timing belt area, risk of overheating.
  400–900 $
  Ad water pump G6BAwater pump 2.7 V6 Santa Fe25100-37101
• !! Timing Belt Fails Prematurely from 90,000 km

  The G6BA 2.7L V6 uses a timing belt with a service interval of 90,000–120,000 km. Missing this service risks belt failure and total engine destruction through valve contact — service history is often unverifiable on used vehicles.

  Symptoms: Engine stall without warning, no restart, dull impacts on cranking attempt, severely damaged valves
  690–1,070 $
  Ad timing belt G6BA 2.7 V6timing beltsatz Hyundai Santa Fe 2.7 Deltawater pump G6BA

+ 4 more engine weaknesses + vehicle weaknesses