HR12DDT / HR12DDV (Renault H5F 6xx) vs K4J
Side-by-side reliability comparison
Specifications
Character
HR12DDT / HR12DDV (Renault H5F 6xx)
"The new three-cylinder 1.2 turbo petrol of the Renault Austral, Espace, Rafale, Clio VI and Captur and the Dacia Duster III (2022 on): 48V mild hybrid (130 hp), LPG Eco-G, and the E-Tech full hybrid and plug-in hybrid (200-300 hp system power). Not related to the old four-cylinder 1.2 TCe. The full-hybrid Austral and Espace built 2022-2024 have had a string of campaigns: a crankcase breather hose that lets fuel dilute the oil (risk of engine seizure), spark plugs replaced for misfires, and cooling-system parts. Mild-hybrid versions have no known engine faults so far. Check that every Renault campaign has been done."
K4J
"1.4-litre 16-valve petrol of the K family, found in the Clio II and III, Megane, Scenic and Modus. A durable, simple engine whose main risk is the timing belt: it is an interference engine, so a failed tensioner, idler or water pump that lets the belt slip bends the valves - change the full kit on time. Otherwise expect cheap electrical faults: ignition coils, the crankshaft sensor and a dirty throttle body."