Mitsubishi Lancer Evolution X

Aluminium instead of cast iron, MIVEC on both intake and exhaust, timing chain instead of belt — the 4B11T is technically more modern but quieter in character than its predecessor. It revs more willingly and builds boost faster; the power curve is more linear, less on-off than the 4G63T. The sound is shorter, sharper, less guttural — more civilised, if honest. In standard trim a reliable engine: 200,000 km without drama if the oil is changed every 5,000 km. The Achilles heel is the open-deck design — above 350–400 hp without a closed-deck insert you risk cracks between the cylinders. No issue for road use up to 300 hp. Critical in everyday use: never shut down immediately after sustained full-throttle driving — the turbo bearings will coke (replacement: 1,200–3,500 EUR). The black fuel pump relay fails from the factory — Mitsubishi released a revised blue replacement; check on every used example. First question when buying: gearbox. The TC-SST is a completely different car from the 5-speed MR — in maintenance requirements, driving feel, and long-term cost.

• !! Piston ring failure and engine damage from 120,000 km

  Piston rings wear prematurely at high power output and elevated boost pressure. Open-deck design promotes thermal stress on cylinder bores. Above 350 hp without a deck insert this becomes critical.

  Symptoms: Heavy oil consumption, blue exhaust smoke under full load, compression loss, uneven idle
  2,500–6,000 $
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• !! Timing chain elongation from 150,000 km

  Timing chain stretches with poor oil maintenance. Unlike the 4G63T, the 4B11T uses a timing chain instead of a belt — lower maintenance requirements, but more expensive to repair when neglected.

  Symptoms: Rattling on cold start from the front of the engine, rough idle, misfires as elongation progresses
  800–2,000 $
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• !! TC-SST dual-clutch gearbox: clutch pack wear from 100,000 km

  TC-SST (Getrag DCT470) clutch packs wear from 80,000 km with hard use. A full rebuild at a specialist costs 6,000–8,000 EUR (parts 4,000 EUR plus 2 days labour). Oil change every 30,000 km is mandatory.

  Symptoms: Juddering on pull-away, long shift pauses, vibration at idle, TC-SST error message on display
  3,000–8,000 $
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+ 8 more engine weaknesses + vehicle weaknesses