Toyota Aygo X AB70

Evolution of the proven 1KR-FE for the Aygo X platform. Same reliability as its predecessor, marginally better emissions. Timing chain requires no maintenance.

• !! Water pump leaking from 60,000 km

  The water pump on the 1KR-FE tends to coolant loss from around 50,000 km. Coloured deposits (blue, green, yellow) around the pump and elevated coolant temperature are typical signs.

  Symptoms: Coloured deposits on the engine block, coolant loss in the expansion tank, temperature gauge rising
  180–450 $
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• ! Elevated oil consumption due to piston rings from 150,000 km

  The revised 1KR-FE2 in the Aygo X shares its base architecture with the 1KR-FE and shows similar oil consumption with short-trip use, though less frequently than its predecessor.

  Symptoms: Oil level drops noticeably between service intervals, blue smoke on cold start possible
  400–900 $
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• ! Upstream lambda sensor failure from 100,000 km

  The upstream lambda sensor fails at higher mileages and leaves fault code P0420. Contact cleaning helps temporarily, but replacement is usually required.

  Symptoms: Engine warning light, fault code P0420 in memory, slightly increased fuel consumption
  110–350 $
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+ 3 more engine weaknesses + vehicle weaknesses