Mitsubishi Outlander 4

Proven 2.4-litre MIVEC naturally aspirated engine with timing chain and DOHC. Generally considered reliable, but vehicles from the 2007–2011 production period have a design-related weakness at the crankshaft radial seal. The timing chain holds with regular oil changes up to around 150,000 km; after that the risk of chain stretch and skipping rises noticeably.

• !! Timing chain stretches at high mileage from 150,000 km

  The 4B12 timing chain tends to stretch above 150,000 km. A broken or jumped chain drive can cause severe engine damage. Regular oil changes are critical for chain longevity.

  Symptoms: Metallic rattling or ticking from the engine bay especially on cold start, rough idle, engine management warning light illuminates
  850–1,400 $
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• !! Crankshaft seal leaking from 80,000 km

  Vehicles from 2007–2011 have a known weakness at the crankshaft radial seal, which can be damaged by foreign matter and leads to oil loss. The design was revised from late 2010 onwards.

  Symptoms: Oil spots under the vehicle near the engine, dropping oil level without visible leak in the upper engine area, oil smell after driving
  150–400 $
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• ! Elevated oil consumption with age from 160,000 km

  At higher mileages the 4B12 can show elevated oil consumption from worn piston rings or valve stem seals. Normal consumption is below 0.25 litres per 1,000 km.

  Symptoms: Dropping oil level between service intervals, slight blue smoke on cold start or under load, oil smell from exhaust
  300–900 $
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