Should I buy a 2016–2018 Citroën C4 1.6 Diesel Automatic?

Explore common problems, estimated repair costs and practical checks for the 2016–2018 Citroën C4 1.6 Diesel Automatic. Use this guide to help assess a used car, then unlock a personalised report for the exact vehicle you're considering.

Common problems

1High Likelihood

AdBlue / SCR emissions faults

UREA or engine warning lights, emissions fault messages, restart countdown, sometimes normal driving at first before the warning returns.

How to check

Start the car from cold, let it idle, then drive until fully warm and watch the dash for emissions warnings.

Estimated Repair Cost

£1,200

2High Likelihood

EGR valve and airflow control faults

Flat acceleration, jerking, cutting out around mid revs, engine light, service light, or limp-home behaviour.

How to check

Accelerate gently through the mid-range in second and third once the engine is warm.

Estimated Repair Cost

£650

3Moderate Likelihood

Coolant housing / thermostat / water outlet leaks

Droplets or staining around the right side of the engine bay, sweet coolant smell, or the level needing top-ups without obvious overheating.

How to check

After a full drive, park up, leave the engine idling briefly, then switch off and watch for smells or fresh drips underneath the front of the car.

Estimated Repair Cost

£500

MOT Failure Rate

0%10%20%30%0–20,000 miles: 10.6% (740 failed / 6,957 tests)20,000–40,000 miles: 17.5% (4,874 failed / 27,818 tests)40,000–60,000 miles: 22.4% (6,321 failed / 28,159 tests)60,000–80,000 miles: 26.1% (4,638 failed / 17,787 tests)80,000–100,000 miles: 27.4% (2,229 failed / 8,127 tests)100,000–120,000 miles: 26.7% (786 failed / 2,946 tests)120,000–140,000 miles: 26.9% (324 failed / 1,203 tests)140,000–160,000 miles: 24.3% (141 failed / 580 tests)160,000–180,000 miles: 25.4% (85 failed / 335 tests)180,000–200,000 miles: 21.4% (42 failed / 196 tests)020k40k60k80k100k120k140k160k180k200kMilesFailure rate
2016–2018 Citroën C4 1.6 Diesel Automatic

Citroën C4 buying questions

Is a 2016–2018 Citroën C4 worth buying?

It can be, but only if the individual car backs it up. For the 2016–2018 Citroën C4 1.6 Diesel Automatic, treat model-level patterns as viewing priorities and let condition, history and inspection evidence decide.

What common problems affect the Citroën C4 (2016–2018)?

The problem cards above list the model-level checks for this guide. Read them as priorities for inspection and paperwork review, not proof that every example will have those faults.

What should I check before buying a Citroën C4?

Look for evidence, not just assurances: MOT advisories, service history, repair invoices, warning lights, fluid leaks, tyre and brake condition, and how the car behaves on a proper test drive. And of course, look at your personalised Should I Buy This Car? report, outlining a full list of common issues in detail, a personalised road test, a plain-English explanation and a MotorIQ score.

A model guide is useful. A report on its registration is better.

The guide above gives you the model-level pattern. A personalised MotorIQ report checks the registration-specific record and turns it into an ownership view before you commit.

Or enter the vehicle manually