2015 Lexus CT 1.8L Hybrid electric (clean) · YK15 WOD

At high mileages, carbon buildup in the Exhaust Gas Recirculation (EGR) system restricts flow, increasing cylinder temperatures and eventually blowing the head gasket. This is the most common major engine failure on high-mileage CT 200h cars, particularly those used for frequent short journeys that prevent the EGR system from reaching self-cleaning temperatures.

Dust, pet hair, and road grime accumulate on the hybrid battery air intake filter located near the rear passenger seat base. A clogged filter reduces airflow, triggering a 'Hybrid System Fault' warning and reducing fuel economy. In extreme cases, prolonged overheating can shorten battery life.

The CT 200h’s front suspension uses drop links and anti-roll bar bushes that wear over time, particularly on F Sport models with stiffer springs. Worn links produce a dull clunk over speed bumps and uneven road surfaces, and can lead to inner-edge tyre wear if not addressed promptly.