IsItAGoodCar
Reliability Guide

Common Problems with the
2019 Ford Focus Mk4 (C519)

The Mk4 Focus ST arrived in mid-2019 with a 280PS 2.3-litre EcoBoost and an optional Performance Pack adding rev-matching, launch control and adaptive dampers. A 190PS 2.0 EcoBlue diesel ST followed for high-mileage drivers.

What changed for 2019

  • •2.3-litre EcoBoost ST with 280PS and 420Nm through a six-speed manual
  • •2.0 EcoBlue 190PS diesel ST for high-mileage drivers
  • •Performance Pack with rev-matching, launch control and pothole-detecting dampers
  • •Focus Active crossover-style trim added to the UK range

Common MOT watch-outs

  • !Performance Pack brake discs and pads wearing quickly on tracked cars
  • !Low-profile 19-inch tyre damage and buckled alloys from potholes
  • !Modified ST exhausts failing noise and emissions checks
3
Known Issues
1
Serious
2
Moderate
0
Minor

All Known Issues

1.5 EcoBlue Cam-Chain Wear

SeriousEngine

Some early 1.5 EcoBlue diesels develop timing-chain noise and wear, particularly where oil changes have been stretched or the wrong oil has been used.

Est. Repair Cost: £800–£1,800
Warning Signs:

Rattle on cold start, Timing-related engine fault codes, Metallic top-end noise as revs rise

What to Inspect:
  • Insist on a true cold start
  • Check for frequent oil servicing with the correct specification
  • Look for chain-kit replacement history on early diesels
Verified by IsItAGoodCar Research Team

AdBlue and NOx-System Faults

ModerateExhaust & Emissions

Euro 6 diesel cars can suffer from NOx-sensor, injector or heater problems that trigger restart countdowns and expensive SCR-system repairs.

Est. Repair Cost: £250–£1,000
Warning Signs:

AdBlue warning, No restart in X miles message, Engine-management light once fully warm

What to Inspect:
  • Drive the car until hot
  • Check for SCR, NOx or reductant-system invoices
  • Ask whether the car has mainly done motorway or urban use
Verified by IsItAGoodCar Research Team

SYNC Battery Drain and Active Grille Shutter Faults

ModerateElectrics & Electronics

Software bugs, telematics modules or failed grille shutters can keep cooling fans running, flatten the 12V battery or generate odd communication faults.

Est. Repair Cost: £0–£450
Warning Signs:

Flat battery after standing, Cooling fan runs unexpectedly, Intermittent module or infotainment warnings

What to Inspect:
  • Check battery age and state of charge
  • Run the infotainment and leave the car standing briefly if possible
  • Scan for active grille-shutter communication faults
Verified by IsItAGoodCar Research Team

Buying Tips for 2019 Ford Focus Mk4 (C519)

  • Check the ST's front tyres, brakes and wheel rims for track use
  • Confirm the Performance Pack is factory-fitted, not retrofitted
  • On the diesel ST, check for DPF and AdBlue warnings after a hot drive
20182020–2021
Check a 2019 Ford Focus Mk4 (C519) by Registration