UK Reliability Directory

MG ZR

Production Years: 2001 - 20055 Documented Faults

Based on the Rover 25, the ZR was a massive UK success. It’s a great-handling "hot" hatch but requires vigilant cooling system maintenance.

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Common Faults & Reliability

These are the most common documented problems for the MG ZR, sorted by their typical impact and frequency.

K-Series Head Gasket Failure (HGF)

high severity

The K-Series engine is prone to head gasket failure due to its small coolant capacity and plastic locating dowels that allow the head to shift.

Est. repair cost:£500–£800

SCU / BCU Failure (Pektron)

medium severity

Later models (2003+) use a Pektron SCU that controls windows, fobs, and wipers. It is notorious for relay failure.

Est. repair cost:£150–£300

Worn Front Suspension

medium severity

The front suspension bushes and ball joints wear out, leading to vague steering, knocking noises, and poor handling. This is a common MOT failure point and can be exacerbated by hard driving.

Est. repair cost:£100–£300
View All 5 Documented Issues

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