CKFCar Known Faults
ModerateAffected: 2004-201050,000–110,000 miles

Vauxhall Astra Astra H 1.7 CDTi 100bhp — Wheel Bearing Wear and Drone

Wheel bearing wear is a normal consumable on UK roads, but frequent pothole strikes accelerate the failure rate significantly.

Severity

Moderate

DIY Difficulty

Hard

Est. Cost

£120–£250

OBD Codes

None

Component Diagram

Wheel Bearing

Typical layout and location for the Wheel Bearing assembly.

Wheel Bearing diagram
Reference Illustration

Symptoms

  • Humming, droning, or roaring noise from the wheels that increases with road speed
  • Noise changes pitch or disappears when turning slightly left or right
  • Slight vibration felt through the steering wheel at motorway speeds

Root Cause

The sealed bearing unit loses its grease over time, or water ingress causes the steel balls/rollers to pit and rust. Impact damage from potholes can also cause a flat spot on the bearing race.

How To Fix

  1. Jack the car up and check for play by rocking the wheel at the 12 and 6 o'clock positions.
  2. Spin the wheel and listen for a rough rumbling sound.
  3. Press out the old bearing and press in a new OEM-quality bearing (e.g. SKF, FAG, SNR).
  4. Cost: £120-250 per corner

Estimated Repair Costs

Repair OptionEst. Cost (GBP)
DIY (parts only)£48–£100
Independent Garage£120–£250
Main Dealership£192–£400

Other Faults on This Variant

EGR Valve Failure

Moderate
2004-201050,000–100,000 miles£80–£350

The Isuzu-sourced Z17DTH and Z17DTJ engines in the Astra H have a well-documented EGR valve failure. Carbon deposits cause the valve to stick, resulting in power loss and increased emissions.

DPF Blockage

Moderate
2007-201040,000–90,000 miles£200–£800

DPF-equipped Astra H 1.7 CDTi models (post-2007) suffer from the same DPF blockage issues as most diesel Vauxhalls of this era. Urban use is the root cause.

Dual Mass Flywheel Failure

Moderate
2004-201080,000–150,000 miles£650–£1000

DMF wear on the Astra H 1.7 CDTi is a high-mileage inevitability. The flywheel's internal dampers lose effectiveness, causing vibration and judder that makes the car unpleasant to drive.

Disclaimer: Repair cost estimates are indicative and based on community data. Always get a quote from a qualified mechanic before proceeding with any repair.