SevereAffected: 2012-201570,000–130,000 miles

Vauxhall Astra Astra J 1.6 CDTi 110bhp — Starter Motor Solenoid / Brush Wear

The starter motor wears out internally. This is particularly common on vehicles equipped with Stop/Start systems.

Severity

Severe

DIY Difficulty

Moderate

Est. Cost

£150–£350

OBD Codes

None

Symptoms

A single loud 'click' when turning the key, but engine doesn't crank
Engine cranks very slowly despite a fully charged battery
Whirring or grinding noise after the engine starts

Root Cause

The carbon brushes inside the motor wear down to the copper wiring, or the contacts inside the solenoid burn out from repeated arcing.

How To Fix

Confirm battery voltage is strong under load (to rule out a dead battery).
Replace the starter motor unit.
Ensure main earth straps from engine block to chassis are clean and tight.
Cost: £150-350

Estimated Repair Costs

Repair Option	Est. Cost (GBP)
DIY (parts only)	£60–£140
Independent Garage	£150–£350
Main Dealership	£240–£560

Other Faults on This Variant

Timing Chain Rattle and Tensioner Failure

Critical

2012-201560,000–120,000 miles£800–£1500

The 1.6 CDTi A16DTH/DTJ engine is notorious for timing chain noise and failure, often from as low as 60,000 miles. This is the most serious known fault on the Astra J diesel.

Clutch Pedal Sticking Down

Severe

2009-201550,000–100,000 miles£150–£700

The clutch pedal fails to return to the top of its travel, often getting stuck halfway or hitting the floor completely.

DPF Blockage and Regeneration System Failure

Severe

2012-201540,000–90,000 miles£200–£1000

DPF blockage is extremely common on the Astra J 1.6 CDTi. The engine's tendency to get stuck in failed regen cycles results in diesel contaminating the engine oil — a serious secondary issue.

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