The highest-rated car in this series at 9/10 — a chain-driven diesel Optima with faults that are easy to spot if you know what to listen for.
- Fuel Type
- Diesel
- Timing System
- Timing chain
Why Technicians Recommend It
The chain-driven 1.7 CRDi Optima is regarded as a very reliable car when properly maintained. It receives the highest technician rating in this group at 9/10.
Sticking Brake Calipers
The brake calipers can stick, causing premature or uneven brake wear.
Alarm Siren Module Fault
A faulty alarm siren module may cause the vehicle to beep twice when it is locked. The fault can also prevent the interior alarm sensors from being switched off.
Alternator Clutch Pulley
Higher-mileage cars may squeak briefly during startup if the alternator clutch pulley is beginning to fail.
What to Check Before Buying
- Inspect the brakes for uneven or excessive wear.
- Check whether any wheel or brake becomes unusually hot after driving.
- Lock the vehicle and listen for two warning beeps.
- Confirm that the interior alarm sensors can be disabled correctly.
- Listen for a squeak when starting a higher-mileage example.
- Check that the service history includes fuel-filter replacement.
- Confirm regular servicing throughout the vehicle's life.
Technician's Inside Tip
Listen closely during a cold start. A startup squeak on a higher-mileage car may point towards a failing alternator clutch pulley.
Final Verdict
The chain-driven 1.7 diesel Optima is a strong used-car choice and earns a technician rating of 9/10. Its known faults are generally identifiable during a careful inspection and are less concerning than the engine issues associated with the later 1.6 diesel.
Alfie has over 11 years of experience in the motor trade and founded Alfa Prestige to give buyers the insider knowledge that was previously only available to professionals.
