IsItAGoodCar
Reliability Guide

Common Problems with the
2004 Rover 25

We've identified 3 known issues that can affect the 2004 Rover 25. 1 of these are serious faults that could be expensive to repair.

3
Known Issues
1
Serious
2
Moderate
0
Minor

All Known Issues

K-Series Head Gasket Failure (HGF)

SeriousEngine

The 1.1, 1.4, 1.6, and 1.8 engines are all prone to gasket failure due to plastic dowels and a small coolant capacity.

Est. Repair Cost: £500–£800
Warning Signs:

"Mayonnaise" under the oil cap, Overheating, Oil in the coolant expansion tank

What to Inspect:
  • Check the oil filler cap and expansion tank
  • Verify the radiator is in good condition
Verified by IsItAGoodCar Research Team

SCU / BCU Relay Failure

ModerateElectrics & Electronics

Models from 2003 onwards (facelift) use a Pektron Security Control Unit. The internal relays fail, affecting various electrical systems.

Est. Repair Cost: £150–£300
Warning Signs:

Intermittent or non-functional wipers, Drivers door locking/unlocking issues, Horn failure, Fobs not working

What to Inspect:
  • Test every electrical switch and the key fobs multiple times
Verified by IsItAGoodCar Research Team

Rusting Rear Arches

ModerateBodywork & Rust

Water gets trapped behind the lip of the rear wheel arches, causing rust to rot through from the inside.

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

Bubbling paint on the rear arch edges

What to Inspect:
  • Feel the inner lip of the rear arches for crusty rust
Verified by IsItAGoodCar Research Team

Buying Tips for 2004 Rover 25

  • ✓The K-Series head gasket is the primary issue; check the oil filler cap for white "mayonnaise" and the coolant for oil mixing.
  • ✓Inspect the rear wheel arches and the bottom of the tailgate for rust.
  • ✓Test the heater blower on all settings; if it only works on speed 4, the resistor pack needs replacing.
  • ✓Listen for suspension knocks from the front; the lower wishbone bushes wear out frequently.
  • ✓Check the operation of the central locking and alarm, which can become erratic due to failing door actuators.
  • ✓Examine the interior headlining, which frequently sags and requires re-gluing or pinning.
Check a 2004 Rover 25 by Registration