Honda Civic

The NiMH high-voltage battery of the IMA system degrades over time due to cell imbalance. From around 130,000–150,000 km, capacity drops significantly. A new Honda battery costs €3,300–€5,500.

Symptoms: IMA warning light on, reduced hybrid output, engine runs on petrol alone more frequently

When the IMA high-voltage battery fails, the DC-DC converter can no longer charge the 12V battery. The vehicle becomes unable to start. Converter replacement costs around €2,150.

Symptoms: 12V battery drains while driving, vehicle won't start, IMA warning light on

Active IMA fault codes cause an MOT failure as the OBD readiness monitors cannot be fully set.

Symptoms: IMA warning light permanently active, OBD readiness not set, MOT/vehicle inspection fails

The electric power steering (EPS) can fail suddenly — the steering wheel becomes heavy without warning. Affects the 8th generation (2006–2011); Honda carried out a recall.

Several recalls were carried out across the entire 8th generation for faulty airbags. There was also a recall for 2008–2010 models due to possible detachment of the water pump pulley.

A software fault in the i-Shift gearbox control unit can cause a vehicle parked in reverse to stall on restart or roll backwards uncontrolled. Affects vehicles from May 2008 to December 2011.

The rear torsion beam can crack at high mileages — particularly at the hub carrier arm. Critical safety issue: crack only detectable by tapping with a hammer (hollow sound instead of a ring). Mainly affects the FN2 Type R used in a sporting manner.

The rear brake calipers seize on city drivers. Regular cleaning and lubrication is necessary; if neglected, pads can wear unevenly.

The Omron AC relay fails prematurely and disables the air conditioning. A straightforward fix is a replacement relay from Mitsuba; often the recommended first step.