2015 Renault Fluence problems

• 1.6 16V 110-135 hp with variable valve timing unit (K4M, 1998-2020)

  110–135 hp · K4M

  It is the version with the most documented faults in the family: ignition coils in roughly one in four testimonies for the Mégane II and Scénic II, a recurring crankshaft position sensor in almost every generation consulted, and one case of timing belt breakage with valve-to-piston contact in the Laguna II.^[2][3][4]

  With caution

Faults that affect 2015 cars

• Medium severityFrequency: Very frequentIgnitionIgnition coil failureThe individual ignition coils are the most-cited fault of the K4J/K4M in the European Renault versions: they fail frequently and cause jerking, loss of power and the engine warning light coming on. It is a cheap electrical part to replace, not internal engine damage.Appears at around 30,000 km
• High severityFrequency: OccasionalTimingTiming belt breakage or premature failureThe K4J/K4M's timing belt is a dry type (not running in oil), but several sources document breakages before high mileage is reached, including one case in the Renault Laguna II with valve-to-piston contact. Sticking to the replacement interval is the best prevention.Appears at around 89,000 km
• Medium severityFrequency: CommonElectronicsCrankshaft position sensor failureThe crankshaft position sensor (capteur PMH) appears repeatedly in the reliability sources for almost every generation with this engine, with hard cold starting, stalling or the car cutting out unexpectedly. It is a cheap part, but the failure can leave you stranded.
• Medium severityFrequency: OccasionalTimingVariable valve timing unit failure (dephaser pulley)K4M versions with a variable valve timing unit can suffer a failure of the unit's pulley (déphaseur): unstable idle, hard cold starting and a metallic knock on start-up. It is a minority of the documented cases, but it recurs across several different generations.
• Low severityFrequency: RareLubricationOil consumption (no documented pattern on this engine)Unlike many modern turbo engines, the sources consulted for the K4J/K4M do not describe a pattern of excessive oil consumption in any of the cars or versions covered by this page.

• EDC6 (6-speed: DC4 dry or DW6 wet)

  · DC4, DW6

  It is the version with the most documented complaints of clutch wear, low-speed judder and complete failures, especially in its dry-clutch variant (DC4); before buying, check the gearbox history and take a demanding test drive both cold and warm.^[5][6]

  With caution

Faults that affect 2015 cars

• High severityFrequency: OccasionalTransmissionEDC gearbox overheating and safety neutralYes: several owners document that the EDC gearbox can drop into neutral or lose its gears when it overheats under sustained load, and Renault even updated the EDC7 (DW5) gearbox software of the first Mégane IV GT cars because the overheating increased the risk of an accident.Repair (garage): €2,100
• High severityFrequency: OccasionalElectronicsControl electronics fault: "check gearbox" warning and loss of gearsYes: a fault in the sensors or switches that tell the control unit the position of each clutch (the "manocontact") can make the EDC gearbox lose the gears associated with one of the two clutches, for example only the even gears or only reverse, with a "check gearbox" warning on the dashboard.
• Medium severityFrequency: CommonClutchPremature dry clutch wear and low-speed judder (EDC6/DC4)Yes: the dry-clutch EDC6 (DC4) is known for juddering and running roughly at low speed, and its clutch wears out sooner than one in a wet gearbox; several owners document clutch and complete gearbox replacements across different Renault models since 2010.
• High severityFrequency: RareLubricationOil leak from the EDC output shaft sealOne documented case (Renault Captur 1.2 TCe 120, failure at 48,000 km) describes an oil leak from the output shaft seal ("joint spy") of the EDC gearbox that ended in a complete automatic gearbox failure; we have not found other cases with the same exact diagnosis.

• 1.5 dCi Euro 5 with particulate filter (75, 90, 95 and 110 hp, 2010-2015)

  75–110 hp · K9K 608, K9K 609, K9K 656, K9K 770, K9K 832, K9K 836, K9K 837, K9K 846, K9K 892, K9K 896

  The 90 hp has an excellent record. On the 110 hp it is worth checking the turbo, the injectors and, on the first units with a DPF, the condition of the filter; on a 2010 Scénic III, check the belt change. Caradisiac considers the engine fully sorted from 2012.^[7][8][9]

  With caution

Faults that affect 2015 cars

• High severityFrequency: OccasionalTurboPremature turbo failure and intake hoses that come looseThe turbo on the 105 and 110 hp 1.5 dCi can fail early: Caradisiac documents it on the Clio III, Scénic III and Qashqai II, sometimes before 80,000 km. More common and cheaper is for a turbo intake hose to come loose or burst and the engine to lose power.
• Medium severityFrequency: OccasionalClutchPremature dual-mass flywheel failure and clutch problemsThe 105 and 110 hp 1.5 dCi engines can break the dual-mass flywheel early, sometimes before 40,000 km. It warns you with vibrations at idle and metallic noises, and forces you to replace the clutch and flywheel assembly.Repair (garage): €700–€1,300
• Medium severityFrequency: OccasionalInjectionInjector and injector seal failuresThe 1.5 dCi injectors, or their seals, can fail early, especially on the 110 hp, causing rough running, jerking or hard starting. Replacing the affected injector is usually enough; Caradisiac still reports cases on the Kadjar and Duster II.

• Critical severityFrequency: OccasionalTyres and wheelsWheel bolts under-tightened on cars built in 2015Yes: a Safety Gate alert (A12/0087/16) covers Fluence X38 cars built between 1 April and 6 November 2015, because insufficiently tightened wheel bolts could cause a wheel to be lost while driving. It is a preventive recall: check with your VIN whether your car is included.
• Low severityFrequency: OccasionalBodywork and interiorPremature deterioration of the steering wheel trim, gear knob and seatSeveral owners compiled by fiches-auto.fr say that the leather on the steering wheel, gear knob and driver's seat degrades sooner than expected, sometimes with parts replaced. There is no campaign or public bulletin about it.
• Low severityFrequency: OccasionalBodywork and interiorBroken or noisy door check strapsSome owners compiled by fiches-auto.fr report doors that creak or make a loud noise when opened and door check straps that break or have to be replaced several times. It is a nuisance with no safety implications, and there is no official campaign.
• Low severityFrequency: OccasionalElectronics and infotainmentCar radio and multimedia GPS faultsIt is the most repeated electrical complaint on fiches-auto.fr for the Fluence: 6 of the 87 reports mention the radio or CD. One testimony describes a GPS/radio that switches on with the car locked. There is no campaign or official data.