IsItAGoodCar
Reliability Guide

Common Problems with the
2018 Toyota C-HR

We've identified 3 known issues that can affect the 2018 Toyota C-HR. None are considered critical, but they're worth knowing about before you buy.

3
Known Issues
0
Serious
1
Moderate
2
Minor

All Known Issues

1.2T Carbon Buildup

ModerateEngine

The 1.2-litre turbo petrol engine can suffer from carbon deposits on intake valves, leading to rough running.

Est. Repair Cost: £300–£600
Warning Signs:

Rough idling, Hesitation under acceleration, Reduced MPG

What to Inspect:
  • Listen for uneven idle
  • Check service history for walnut blasting or intake cleaning
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12V Auxiliary Battery Drain

MinorElectrics & Electronics

The small 12V battery can go flat if the car is left unused for more than 4-5 days, a common issue on hybrid models.

Est. Repair Cost: £120–£200
Warning Signs:

Car won’t start, Remote locking fails, Electronic glitches

What to Inspect:
  • Check battery age and voltage
  • Ask if it has been replaced recently
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Windscreen Cracking

MinorBodywork & Rust

Early models were prone to stress cracks developing from the edges of the windscreen without any stone impact.

Est. Repair Cost: £300–£500
Warning Signs:

Hairline cracks appearing near the A-pillars

What to Inspect:
  • Inspect the windscreen edges carefully
Verified by IsItAGoodCar Research Team

Buying Tips for 2018 Toyota C-HR

  • ✓Check the hybrid battery health report from a main dealer to ensure the 10-15 year battery warranty is still active
  • ✓Modern C-HRs are prone to 12V battery drain; ensure the car is driven regularly to keep the auxiliary battery charged.
  • ✓Inspect the rear bumper and blind spots for parking damage, as rear visibility is notoriously poor
Check a 2018 Toyota C-HR by Registration