IsItAGoodCar
Reliability Guide

Common Problems with the
1998–2004 Ford Focus Mk1 (C170)

We've identified 2 known issues that can affect the 1998–2004 Ford Focus Mk1 (C170). 1 of these are serious faults that could be expensive to repair.

2
Known Issues
1
Serious
1
Moderate
0
Minor

All Known Issues

Rear Suspension Control Arm Rust

SeriousSuspension & Chassis

The rear multi-link arms are made of thin steel and rust through, a common MOT failure.

Est. Repair Cost: £150–£350
Warning Signs:

Vague rear-end handling, Clunking from rear over bumps, Visible rust on lower arms

What to Inspect:
  • Check the "dog bone" arms for thinning or holes
Verified by IsItAGoodCar Research Team

Speed Sensor (VSS) Failure

ModerateElectrics & Electronics

The Vehicle Speed Sensor fails, causing the speedometer to drop to zero intermittently.

Est. Repair Cost: £60–£120
Warning Signs:

Speedometer drops to zero, Radio volume changes, Engine stalls when stopping

What to Inspect:
  • Observe speedo behavior during test drive
Verified by IsItAGoodCar Research Team

Buying Tips for 1998–2004 Ford Focus Mk1 (C170)

  • ✓Rust is the ultimate killer; check the wheel arches, bottoms of the doors, sills, and the rear subframe very carefully.
  • ✓Check the instrument cluster; speedometers frequently fail or drop to zero due to a faulty vehicle speed sensor in the gearbox.
  • ✓Listen for knocking from the rear suspension over bumps, which indicates the trailing arm bushes (crucial to the Control Blade setup) have failed.
  • ✓On the 1.6 Zetec engine, ensure the cambelt has been changed and check the spark plug wells for water ingress from leaking washer jets.
  • ✓Verify the central locking works on all doors; the door latch mechanisms frequently fail, refusing to lock or unlock.
  • ✓Test the power steering for leaks or heavy feeling, particularly around the rack ends, which is a common MOT failure.
Check a 1998–2004 Ford Focus Mk1 (C170) by Registration