KNOWN FAULTS · Renault

Renault Mégane (II) 2.0 dCi (M9R) common problems.

2002–2009 · Diesel

Sources are not verified in real time and no entry confirms that your car is affected.

2 known faults with sources

Applies if: Only with a key card (keyless start).

“Card not detected”: the car does not recognise the key cardElectrical and electronic systems

Engine / equipment: Hands-free card and cabin unit (UCH)
Period mentioned: Approx. 2003–2009
Symptoms: The cards stop opening or starting the car, hands-free and with the buttons, and “Card not detected” appears; sometimes it clears by itself after a few minutes.
Possible cause described: Owner reports: the cabin unit (UCH) stops recognising the cards’ code; described as common on the Scénic II and Mégane II.
Check for the garage: Try the other card and its battery; at the dealer or with a diagnostic tool, check the UCH and relearn both cards.
Cost cited in the source: No verified estimate; relearning the cards is usually a short garage job.A rough figure from the original database, not an up-to-date quote.

Seized injectors and stretched chain on the 2.0 dCi (M9R)Timing / injection

Engine / equipment: 2.0 dCi (M9R) diesel with timing chain
Period mentioned: Approx. 2005–2023
Symptoms: Chain noise at high mileage; loss of power and emissions warnings in town use; injectors that will not come out when removed.
Possible cause described: The chain can stretch at high mileage, the injectors can seize in the cylinder head and, with short trips, the particulate filter and EGR clog.
Check for the garage: Listen to the chain from cold, check injection and emissions codes, and before removing injectors have extraction tools ready. Keep oil changes up to date.
Cost cited in the source: No verified estimate; ask the garage for a quote.A rough figure from the original database, not an up-to-date quote.