IsItAGoodCar
Reliability Guide

Common Problems with the
2016 Ford Focus Mk3 (C346)

2016 added the ST-Line trim that came to define the UK Focus range and launched the 350PS Mk3 RS, a 2.3 EcoBoost four-wheel-drive hatch with drift mode.

What changed for 2016

  • •ST-Line trim introduced in 2016 and later joined by ST-Line X
  • •Focus RS Mk3 launched with a 2.3 EcoBoost, 350PS and torque-vectoring AWD
  • •SYNC 3 replaces SYNC 2, adding Apple CarPlay and Android Auto
  • •1.5 TDCi became the mainstream diesel as the 1.6 was phased out

Common MOT watch-outs

  • !RS head gasket failures and coolant loss on early 2016 cars
  • !ST-Line 18-inch wheels and low-profile tyres damaged by potholes
  • !Rear subframe and suspension arm corrosion
2
Known Issues
1
Serious
0
Moderate
1
Minor

All Known Issues

1.0 EcoBoost Wet Belt & Cooling

SeriousEngine

Timing belt degradation and degas hose failure. Catastrophic engine risk.

Est. Repair Cost: £1,200–£4,000
Warning Signs:

Low oil pressure warning, Engine rattle, Coolant loss

What to Inspect:
  • Oil service history
  • Recall status for cooling hose
Verified by IsItAGoodCar Research Team

Rear Bumper Vent Leaks

MinorBodywork & Rust

Water enters the boot through failed seals on the cabin pressure vents behind the rear bumper.

Est. Repair Cost: £100–£250
Warning Signs:

Wet boot carpet, Mist on inside of windows, Water in spare wheel well

What to Inspect:
  • Check the side carpets in the boot for dampness
Verified by IsItAGoodCar Research Team

Buying Tips for 2016 Ford Focus Mk3 (C346)

  • On an RS, confirm the head gasket campaign was completed and look for coolant stains
  • Inspect the inner edges of the 18-inch tyres for wear and kerbing
  • Pair a phone to SYNC 3 before relying on it
20152017–2018
Check a 2016 Ford Focus Mk3 (C346) by Registration