Renault Engine Codes Explained: K9K, K4M, H4M and What They Mean for a Parts Lookup

A 1.5 dCi is not a specification

The trade runs on shorthand. A caller gives you a model, a year and a capacity, and most of the time that is enough to get a wiper blade or a set of pads off the shelf. Diesel injection is where the shorthand collapses. A 2010 Megane 1.5 dCi can be a Delphi car or a Continental car, with a fixed or a variable geometry turbocharger, with or without a particulate filter, and the injectors, the turbo and the loom differ between them. The return arrives after the car is already stripped.

Renault's own owner handbook is blunt about this. The engine identification plate carries three items, engine type, engine suffix and engine number, and the handbook tells the owner to quote that information when ordering parts. Three separate fields, because one of them on its own does not identify the engine.

The catalogue is indexed by the code. That decides the fit of everything bolted to the block: injection supplier, turbocharger type, timing drive, flywheel, sump, wiring. All of it tracks the code. Get the code and the suffix right at the counter and the rest of the enquiry is just typing.

Reading XnY: what each character in the code is doing

The index Renault has used since the mid 1980s has the form XnY plus a three character suffix. X is the family letter. The digit describes the engine architecture. Y is a letter standing for a displacement band, and the last three characters identify the exact build. K9K 836 reads as K family, direct injection diesel, roughly 1,461 cc, build 836.

The middle digit is the part most people get wrong. 4 means a petrol engine with four valves per cylinder. 7 means multipoint petrol injection with hemispherical chambers and two valves per cylinder. 8 means indirect injection diesel and 9 means direct injection diesel. That is why K4M is the 16 valve 1.6 petrol, K7M the 8 valve 1.6 petrol and K9K the direct injection 1.5 diesel. They share the K and very little else. Those four digits are the ones that come through the door most often, and the set is larger: the 1.2 and 1.3 TCe engines carry a 5 in the middle, and I have not found a published meaning for that one worth repeating at a counter. The digit describes architecture. Plenty of people read it as a recency marker, so that a higher number means a newer engine, and that habit has no documented basis behind it.

The third letter is a capacity band. Renault does not publish that table, but cross checking against real engines gives a scale you can work with.

The family letters themselves are less settled than the forums suggest. F for fonte, meaning cast iron, is documented, and E for Energy is documented. Expansions for K, H, M, R and D circulate widely with no source anyone can produce on request. The letter is an index. Nothing is lost by using it as one, because that is all the catalogue does with it.

• J: about 1,390 cc. K4J, K7J.
• K: about 1,461 cc. K9K.
• M: about 1,598 cc. K4M, K7M, H4M, R9M.
• R: about 1,995 to 1,998 cc. F4R, M9R.
• T: about 2,298 cc. M9T.
• U: about 2,464 cc. G9U.

K9K and K4M: the two you meet most weeks

The K9K is 1,461 cc, bore 76 mm, stroke 80.5 mm, single overhead camshaft with only eight valves, common rail direct injection, belt driven. It has been in production since 2001 and passed ten million units built by April 2013, out of Bursa, Chennai and Valladolid. Compression is not one figure across that run. It came down as the emissions equipment went on, so take the ratio from the data for the exact suffix. The engine comes in three architectures: low power, high power, and high power with a variable geometry turbocharger. Power steps track the emissions standard. Euro 3 ran 65, 80 and 100 PS, and each emissions step pushed the same three rungs up: 70, 85 and 106 at Euro 4, then 75, 90 and 110 at Euro 5. Turbochargers come from Garrett and BorgWarner.

Injection hardware usually splits by power output. Delphi supplied the lower power versions up to 66 kW, Continental, formerly Siemens, supplied 70 kW and above, and Bosch appeared on some Euro 5 low power versions. Delphi and Continental injectors carry different calibration codes and are not interchangeable as sets. That single split is behind more wasted diesel jobs than any other detail in the range.

The K9K wears other badges, which is useful when you are sourcing. K9K 846 is listed as the Mercedes OM607 DE 15 LA, and the family went into the Mercedes A-Class, B-Class, CLA and Citan as the OM607, later OM608, and into the Infiniti Q30. Suzuki fitted K9K 700 and K9K 266 to the Jimny. Nissan used it in the Micra, Note, Almera, Tiida, Cube, Qashqai, Juke and NV200. A dismantler's Micra can be a donor for a Clio when the suffix lines up.

The K4M is the petrol you see just as often. Cast iron block, aluminium head, camshafts driven by a toothed belt, and cylinder liners bored directly into the block rather than pressed in, so a bore past its wear limit means a machine shop or another block. K4M is 1,598 cc at 79.5 x 80.5 mm and K4J is 1,390 cc at 79.5 x 70 mm. Both share their timing kit and their water pump with the 16 valve F-type engines F4P and F4R, which is a real sourcing route when the K listing is on back order. Oil capacity tracks the cylinder head, not the litre on the badge. K4M and K7M are both 1,598 cc and take different fills, because one has 16 valves and two camshafts and the other has 8 valves and one, so read the quantity off the data for the exact code and suffix.

The rest of the block list you will meet on a Renault ramp

Beyond those two, the working list of codes that come through the door is short enough to keep in your head.

One line out of that list saves the most time. The timing drive does not follow the fuel. The 1.5 dCi K9K runs a belt, while the 1.6 dCi R9M, the 2.0 dCi M9R and the 2.3 dCi M9T are chain driven. A belt kit booked onto a 1.6 dCi Trafic ties up a bay for a morning and the parts go straight back.

• H4M. 1,598 cc, 78 x 83.6 mm, twin cam 16 valve, timing chain. Renault's designation for the Nissan HR16DE, sold as the 1.6 SCe. It has no hydraulic lash adjusters, so valve clearances have to be measured and set by hand.
• H5Ht, the 1.3 TCe. 1,332 cc, 72.2 x 81.4 mm, turbocharged direct injection, compression 10.6:1, roughly 80 to 120 kW, in production since 2018. The same engine as the Mercedes-Benz M282 and the Nissan HR13DDT, fitted across Renault, Dacia, Nissan and Mercedes compacts.
• H5Ft, the later 1.2 TCe. 1,197 cc, from February 2012, in Clio IV, Captur, Kangoo II, Megane III and IV, Scenic III and IV, Kadjar, Lodgy, Dokker and Duster. It has a documented abnormal oil consumption problem that reached the French courts, with Renault ordered in 2023 to hand documents to claimants.
• D4Ft, the original 1.2 TCe from 2007. A turbocharged 1,149 cc D4F with compression dropped from 9.8:1 to 9.4:1.
• R9M, the 1.6 dCi. 1,598 cc, 80 x 79.5 mm, twin cam 16 valve, common rail, 130 to 180 PS, chain driven, with the 160 PS version twin turbocharged. Mercedes-Benz sells the same block under its own engine numbers, the OM626 in the C-Class being one, and the van installations carry a different number again, so pin the Mercedes number to the exact application before you cross reference a part.
• R9N, the 1.7 Blue dCi. 1,749 cc at 120 and 150 PS.
• M9R, the 2.0 dCi. 1,995 cc, 84 x 90 mm, from early 2005 in Megane, Scenic, Laguna, Vel Satis, Koleos and Espace, and in the Nissan Qashqai and X-Trail.
• M9T, the 2.3 dCi. 2,298 cc, 85 x 101.3 mm, launched in 2010 in the Master and other vans, and sold by Nissan as the YS23 in the Navara D23.
• F4R. The 1,998 cc 16 valve petrol, 82.7 x 93 mm, relevant at the counter because it shares timing components with K4J and K4M.

dCi, TCe, SCe and Blue dCi: what the badge maps onto

The badges are family markers written for the customer. dCi covers the common rail diesels, which in practice means K9K, R9M, R9N, M9R and M9T. TCe covers the turbocharged petrols, with D4Ft, H5Ft and H5Ht among them. SCe covers naturally aspirated petrol, and the 1.6 SCe is the H4M.

Renault's current European engine page does not spell the abbreviations out. Expansions appear in market launch coverage and then get repeated as official wording. Treat the badge as a pointer to a group of engines. It says nothing reliable about any single one.

Blue dCi is the clearest case of a badge that is not an engine family. It is the SCR and AdBlue version of units already in production. The 1.5 Blue dCi carries K9K 872, 873 and 874 codes at 95 to 115 hp from 2018, in the Dacia Dokker, Duster II, Lodgy, Logan II and Sandero II, and in the Renault Captur II, Kadjar, Kangoo II and Megane IV. The 1.7 Blue dCi is the R9N. The block did not change. The aftertreatment did, and with it the suffix and everything downstream of the turbocharger.

Capacity in the badge is no safer. The 1.2 TCe label covers two unrelated engines, the 1,149 cc D4Ft and the 1,197 cc H5Ft, which do not even share a capacity, let alone a parts list.

Where the code is stamped, and why the VIN plate does not carry it

Renault's handbook says the engine plate carries exactly three items, engine type, engine suffix and engine number, and then says the thing most guides skip over: the location varies depending on the engine. There is no single instruction that covers the range. Reports place the stamped code on the front of the block, near the dipstick tube, at the bellhousing joint by the starter and under the timing cover on different engines, and the only method that always works is to clean the block and look.

The vehicle identification plate is not where to look. Its numbered fields are the manufacturer name, EC design or approval number, VIN, maximum permissible all up weight, gross train weight, front and rear axle limits, a reserved field, diesel exhaust emissions and the paint reference. No engine code appears on it at any point, which is why people spend ten minutes on that plate and decide something has been removed.

On post 1995 cars the oval plate moved from the engine compartment to the right hand door aperture, and it usually carries the engine type and suffix together. Dialogys, Renault's own after sales system, shows the same three fields once a vehicle is identified: engine type, for example K4M, engine type with suffix, for example K4M800, and the engine fabrication number, something like D002350. That middle field is the one a parts enquiry needs.

Do not read the code off a sticker on the rocker cover or the timing cover. Covers get swapped between engines during belt jobs and dismantlers strip whichever one is cleanest. The stamped block code and the riveted plate are the two that survive the car's life. When both are unreadable, the catalogue is the fallback, since Dialogys combines the parts catalogue with repair and fault finding documentation for Renault and Dacia and can be driven from the VIN or from oval plate data. Online platforms such as VINsearch open those same official catalogues from a VIN without a dealer login.

The three digits everyone drops off the end

K9K 836 and K9K 837 are both the 110 hp engine. The published tables list 837 as the automatic gearbox version, and the general naming note says an odd suffix number usually refers to an automatic transmission configuration while an even number means manual. Flywheel, clutch and starter all follow that difference. Quote K9K on its own and you have specified about a third of the engine.

Treat the odd and even rule as a prompt, and check it in the catalogue before it costs you a dual mass flywheel. It holds for 836 and 837 and it appears in the documented naming conventions, but I have not seen it confirmed as something Renault applies across every family and every suffix.

The suffix carries more than the gearbox. It tracks injection supplier, turbocharger type, aftertreatment and market. K9K 872, 873 and 874 are the Blue dCi units with SCR. K9K 700 and K9K 266 went to Suzuki. K9K 846 is the Mercedes OM607. Nobody publishes a suffix by suffix map of fixed against variable geometry turbochargers, so the three architectures are documented while the individual assignments only become visible through the catalogue for a given VIN.

This is also why sourcing a used or reconditioned engine on the family code goes wrong. A K9K with a different suffix can arrive with the wrong sump, the wrong flywheel, the wrong injection supplier and a loom that will not plug in. A one day swap becomes three days of parts hunting, usually with the customer's courtesy car still out.

Same nameplate, same year, two different engines

Dacia Duster generation one is the example every parts counter learns eventually. Catalogues list K4M with a timing belt for the 2010 to 2015 cars and H4M with a timing chain for the 1.6 SCe 115 from around June 2015, with H4M 730 usually on the 4x4 and H4M 738 on the two wheel drive. Same bonnet, same badge. One car needs a belt kit and a water pump. The other needs a chain kit and a very different labour figure.

Trafic III did the same thing at the other end of the range. It used the 1.6 dCi R9M in single turbo form, with codes such as R9M 408 and R9M 413, and in twin turbo form with codes such as R9M 450, until the 2019 facelift replaced the whole 1.6 range with a 2.0 Blue dCi M9R running a single variable geometry turbocharger at 120, 145 and 170 hp. A fleet with vans either side of that change is running two separate service parts lists under one model name.

The same trap works the other way with capacity. K4M and K7M are both 1,598 cc with identical bore and stroke, and they share very little that matters: one is 16 valve with two camshafts, the other 8 valve with one, with different heads and different oil capacities. Two engines of the same size can be two entirely different engines.

Treat any mid generation facelift as a possible engine change until the catalogue says otherwise. The badge survives a facelift. Under it, the timing drive can go from belt to chain.

Why a Dacia enquiry is a Renault enquiry

Dacia is not a separate parts world, and treating it as one costs time. K7M, K4M, K9K, D4F and H4M all appear under Dacia with Renault suffixes. A Logan and a Clio of the same year can share a timing kit while two Clios of the same year do not, because the item they share is the engine and the item that separates them is also the engine.

The Blue dCi rollout shows how far one family of suffixes reaches. Three of them, 872, 873 and 874, cover five Dacia nameplates and four Renault ones, which is why a Sandero II in a breaker's yard is a live donor for a Kangoo II.

Dialogys covers Renault and Dacia in one system, which is why one VIN entry point serves both brands and why cross brand sourcing is a normal day at the counter. VINsearch opens 52 official manufacturer catalogues behind a single login, Renault and Dacia among them, at $3 for a day pass, $50 a month or $500 a year, which matters on the day one enquiry needs three marques inside an hour.

Match on the suffix when buying from a breaker. A donor advertised as a Sandero 1.5 dCi tells you the family and nothing else, and the injectors on it may come from a different supplier than the ones in the car on your ramp.

What the engine code will not tell you

The code fixes the parts. Service intervals are a separate lookup, and they move about. There is no single official cambelt interval for the K9K that survives contact with the evidence: 72,000 miles and five years, 90,000 km and six years, 120,000 km and 160,000 km all circulate, and Renault's own schedules vary by model, market and year. Look up the schedule for the exact vehicle before quoting a number down the phone.

A VIN decode will not settle the engine variant either. The VIN was written at build, so it says nothing about an engine swapped in later, and dealer decodes have been reported returning engine strings that do not map onto the three digit suffix parts suppliers index by. The stamped code on the block and the engine plate settle it, in that order.

New K9K common rail injectors have to be written into the ECU before the engine will run to specification. Delphi units carry C2i or C3i calibration codes and Continental units carry their own printed injector code, and both are normally written in per cylinder. Trade opinion is split over whether Delphi units strictly require it. An engine that runs without coding and an engine that runs correctly are two different outcomes, and the usual sequence is a car that starts, then runs rough, smokes and cooks the particulate filter.

The code will not tell you whether a previous owner fitted a different turbocharger, or what the ECU has been mapped to. Whether the filter is still in the exhaust is a question for a torch and a jack. Valve clearances on the H4M are a mechanical adjustment and an inspection item, and the interval sits in the schedule for that exact vehicle, so look it up before it goes on a quote. Where a source is thin, say so. Ask the owner to photograph the oval plate in the door aperture and send it through, and the enquiry moves in five minutes. Guess instead, and it is a Delphi set going into a Continental engine and a comeback the following week.