Opel Astra
The 1.6-litre CDTI from the GM/PSA partnership is economical and powerful, but suffers from a systemic timing chain problem. Rattling on cold start is widespread and regarded as a known weakness. Timing chain and tensioner should be checked regularly at higher mileage.
Astra K diesel
81 kW diesel in the Astra K – solid everyday engine.
Engine Weaknesses 4
The timing chain rattles on cold start due to a slow-reacting tensioner. The tensioner is mounted on the gearbox side and is difficult to access. Opel developed a revised tensioner.
Symptoms: Metallic rattling for 1–4 seconds on cold start, sometimes also under load changes when warm. Noise originates from the gearbox side of the engine.
Mandatory recall for illegal defeat device. The software update significantly raises the EGR rate, leading to accelerated carbon buildup in the EGR valve, intake manifold and pressure sensors.
Typical diesel problem, amplified by the emissions scandal software update: soot deposits in the EGR valve and intake manifold reduce engine performance. Cleaning every 60,000–80,000 km recommended.
Symptoms: Power loss under part throttle, hesitation when pulling away, elevated fuel consumption, black smoke, engine warning light.
Early turbocharger failures were documented, in some cases below 10,000 km. A software update increased oil pressure and resolved the problem in known early-failure batches.
Symptoms: Power loss, whistling noise from the engine bay, bluish smoke, boost pressure fault code P0299.
Vehicle Weaknesses 14
The clutch slave cylinder seal dissolves and contaminates the hydraulic system. Affects diesel manual gearbox models 2016–2018. Recall number 181803130.
The M32 6-speed manual gearbox shows stiff gear engagement especially cold, particularly 2nd and 3rd gears. Air in the clutch hydraulics or a faulty clutch slave cylinder are the common causes.
Water from the wheel arch runs onto the plastic mounting bracket of the engine carrier and promotes corrosion from the inside out. Rust warranty applies for 12 years with a complete service history.
Rear coil springs can break prematurely due to corrosion at the spring seat, sometimes as early as 38,000 km. Rust grips the spring root. Grounds for MOT failure.
LED headlights on the Astra K fail sporadically due to loose connectors and faulty control units. Mainly affects early production years 2015–2017.
The Astra K shows chronic oil loss at various gaskets according to ADAC and MOT reports. Visible oil residue on the underbody leads to rejection at the MOT.
Squealing noises from the EPS steering at high temperatures are a known Astra K issue. In severe cases the steering assist cuts out. Cause: steering rack wear or electrical connections.
The display on the Navi 900 IntelliLink flickers, stays black, or shows colour errors. Hardware defect at the display panel. Replacement costs around €160 (used) to €1,250 (new).
The first HMI module in the Astra K (pre-2016 recall) freezes or becomes unresponsive. Sporadic audio dropouts can still occur even after updates.
The infotainment system on the Astra K regularly freezes or crashes. Navigation and Apple CarPlay stop responding. Often fixable by a software update, but the problem returns.
The rear brake discs on the Astra K corrode noticeably faster than the fronts according to MOT reports. With standing time or low brake usage they rust up and must be replaced prematurely.
On the Astra K the fresh air channel drain becomes blocked by leaves and debris. Water then runs into the cabin (driver's footwell or rear left).
The blend door actuator in the Astra K fails. Temperature can then no longer be regulated — regardless of the dial position, only cold or only hot air comes out.
The A-pillar trim on the Astra K detaches or warps and rattles while driving. Also crackling noises from the passenger door.
Reports & Tests
Oil loss remains the dominant problem. On the Astra K, infotainment failures, juddering 1.4 turbo engines and fogged driver assistance camera lenses are additional issues. Recalls affected defective airbag inflators and brake master cylinders.
