IsItAGoodCar
Reliability Guide

Common Problems with the
2018 Renault Megane Mk4

We've identified 4 known issues that can affect the 2018 Renault Megane Mk4. 1 of these are serious faults that could be expensive to repair.

4
Known Issues
1
Serious
2
Moderate
1
Minor

All Known Issues

1.2 TCe oil consumption (H5F)

SeriousEngine

Early Mk4 Meganes with the 1.2 TCe engine are prone to high oil consumption. This is a well-documented issue that can lead to carbon buildup and eventual engine failure if the oil level is not strictly maintained.

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

High oil consumption, Blue smoke on overrun, Engine hesitation

What to Inspect:
  • Ask about oil usage between services
  • Look for evidence of ECU software updates related to oil consumption
  • Prefer the later 1.3 TCe engine (2018+)
Verified by IsItAGoodCar Research Team

EDC low-speed shudder and actuator issues

ModerateGearbox & Transmission

The Megane’s dual-clutch automatic can hesitate or shudder in traffic and may need software work or more expensive clutch and actuator repairs if ignored.

Est. Repair Cost: £150–£2,200
Warning Signs:

Jerky pull-away, Delay selecting drive, Clutch smell after manoeuvring

What to Inspect:
  • Drive it in stop-start traffic
  • Try repeated hill starts and reversing
  • Check for gearbox software or clutch invoices
Verified by IsItAGoodCar Research Team

Blue dCi AdBlue and NOx-sensor faults

ModerateExhaust & Emissions

Later Euro 6 diesels can suffer from SCR warnings, NOx-sensor faults and AdBlue system issues that create limp mode or repeated check-emissions messages.

Est. Repair Cost: £250–£1,200
Warning Signs:

Check emissions system message, AdBlue warning, Engine light or limp mode

What to Inspect:
  • Scan for stored SCR and NOx codes
  • Check whether sensors or injectors were replaced
  • Drive it until fully hot before judging it
Verified by IsItAGoodCar Research Team

R-Link / Easy Link and digital-dash glitches

MinorElectrics & Electronics

Touchscreen lag, rebooting displays, navigation dropouts and parking-camera glitches are familiar ownership annoyances on the Mk4 Megane.

Est. Repair Cost: £0–£700
Warning Signs:

Screen freezes, Digital dash reboots, Camera or sensors fail intermittently

What to Inspect:
  • Test media, navigation and parking aids together
  • Cold-start the car and watch for warning messages
  • Check dealer software-update history
Verified by IsItAGoodCar Research Team

Buying Tips for 2018 Renault Megane Mk4

  • ✓On EDC cars, do a full low-speed test rather than just cruising because hesitation and clutch shudder usually show up in traffic
  • ✓Blue dCi diesels should be scanned for stored NOx or AdBlue faults even if the dash is currently clear
  • ✓1.3 TCe petrols are worth checking for slow coolant loss around the thermostat housing after a long drive
  • ✓Make sure the R-Link or Easy Link system, digital dash and parking aids all work properly from a cold start
2016–20172019
Check a 2018 Renault Megane Mk4 by Registration