Renault 2.3 dCi (M9T)Injectors
Faulty injectors on the 2.3 dCi on the 2.3 dCi (M9T)
Why this rating?
Symptoms
- Injection problem message and limp mode.[1][2]Limp mode: other faults that cause it · Garage soon
- Injection or engine warning on the dashboard.[2]Engine warning light: other faults that cause it · Garage soon
Why it happens
The sources do not specify the mechanical cause; they speak only of the symptom and the repair cost.[1]
Affected cars and years
The injection warning testimonials are concentrated on the 150 to 180 hp twin-turbo versions.[2]
| Version | Years | Codes |
|---|---|---|
| 2.3 dCi 100-125 hp (M9T) | since 2010 | M9T |
| 2.3 dCi 130-145 hp (M9T) | since 2010 | M9T |
| 2.3 dCi 150-180 hp (M9T, some twin-turbo) | since 2010 | M9T |
| 2.3 dCi in the Navara D23 (NP300) | since 2014 |
Models fitted with the affected versions
Nissan
- Nissan NV4002011–2021
- Nissan Navara D23since 2014
Opel
- Opel Movano B2010–2021
Renault
- Renault Master III2010–2024
How much it costs to repair
Includes: Repair or replacement of injectors, range from a French source.[1]
Another source gives €800-1,200 for all four injectors; see unknowns.
Prices in Spain, including VAT. A workshop hour costs on average €38–66 at independent garages and €77–134 at dealerships in Spain, depending on the region and the brand. How we calculate costs
How to check for it before buying a used car
- Read the fault memory and check that there are no active injection codes.[2]
Parts needed
The part or kit that fixes this fault, according to the sources.
Common rail injector
Meters the diesel into each cylinder.
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How to prevent it
- Oil changes every 20,000 km at most, according to the sources.[1]
Recalls, campaigns and claims
As of 5 October 2026, we have no record of recalls, campaigns or extended manufacturer warranties for this fault. Check with an official dealer using the chassis (VIN) number: they will tell you whether the car has any outstanding campaign.
What owners say
Frequently asked questions
How much does it cost to replace the injectors on a Master 2.3 dCi?
The sources consulted give figures of €400 to €1,800 and, in another, €800 to €1,200 for all four; they vary from case to case and are not quotes from a Spanish workshop.[1]
What can you do now?
We will put you in touch with a partner only if you authorise it in the form.
Other 2.3 dCi (M9T) faults
- High severityFrequency: OccasionalEmissions controlClogged or broken EGR valve damaging the turboThe 2.3 dCi's EGR valve clogs with soot in urban use and, if it breaks, its fragments can damage the turbo. A French source cites bills of €1,200 to €2,300 for the EGR and turbo together.Repair (garage): €1,200–€2,300
- Medium severityFrequency: OccasionalEmissions controlDiesel particulate filter (DPF) clogged in urban useIn urban deliveries with little mileage the particulate filter may fail to regenerate and become clogged. One source puts the servicing or replacement at between €350 and €1,500.Repair (garage): €350–€1,500
- High severityFrequency: RareFuelFuel pipe rubbing against the wiring harness (recall 0EC1)In July 2024 Renault recalled 35,039 Master 2.3 dCi vans built from 23-09-2014 to 27-09-2023 because of possible rubbing of the fuel pipe, which could leak. The fix is a spacer.
- Low severityFrequency: RareEmissions controlSCR system and AdBlue tank faultsOn Euro 6 engines with AdBlue there are documented SCR system faults. On the Navara D23 2.3 dCi EU6b (2016-2019) a software update campaign was carried out, covering 1,012 units in Poland.
More faults with the injectors on other engines and cars
- High severityFrequency: Very frequentOM651Delphi piezo injector failure (220/250 CDI)Yes: 220 and 250 CDI models built between 2008 and 2011 had Delphi piezo injectors that were prone to failing and seizing in the cylinder head. Mercedes-Benz replaced them under warranty in 2009 and switched the 220 CDI to solenoid injectors from 2010-2011, but the 250 CDI kept them.Repair (garage): €3,600–€5,900
- High severityFrequency: CommonBMW N52 / N53N53 piezoelectric injector failureThe N53's piezoelectric direct injectors fail frequently and cause misfires, rough idle and limp mode; replacing them is expensive and they must be coded.
- High severityFrequency: CommonMZR-CDOil dilution from leaking injector seals and DPF regenerationsOn the 2.0 and 2.2 MZR-CD, injector seals that age badly and incomplete particulate filter regenerations on short journeys can let unburnt diesel into the sump, diluting the oil and leaving the engine with less lubrication.
- High severityFrequency: CommonOM642Wear and failure of the Bosch piezo injectorsThe OM642's Bosch piezo injectors can fail from around 150,000-200,000 km, especially with poor-quality diesel; they cannot be repaired, only replaced. Because it is a V engine, those on the rear bank are harder to reach, which pushes up labour costs.Repair: €4,500–€6,500
- High severityFrequency: Common2.2 CDI (OM646)Injector seal leak with carbonisation around the seatYes: the copper washer that seals each injector can harden and let combustion gases through, forming a black crust of carbon around it. It is a known fault on Mercedes CDI diesels of this era, with injectors described as fragile on both the OM611 and the OM646.
- High severityFrequency: Common2.2/2.5 dCiInjection pump or injector failureThe 2.2 dCi's common rail injectors fail fairly often on the X-Trail and Almera, with cases of seizing and leaks; on the Almera with the older YD22DDT, the documented fault is in the injection pump electronics, not the injectors.
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Sources
Every fact on this page links to its source. If you find an error, let us know.
- Renault Master III 2.3 dCi 130: fiabilité, pannes et coûtsCarverif · Other source · consulted 5 October 2026 · in French
- Fiabilité Renault Master 2.3 dCiCarverif · Other source · consulted 5 October 2026 · in French