Citroën C6 problems (2005–2012)
All 2 engines of the Citroën C6 that we have documented have high or critical severity faults: the TDV6 / SDV6 and the 2.2 HDi. None has a «Buy» verdict; the safest option is the 2.2 HDi, with a «With caution» verdict.[1][2]
Outside the engine: Outside the engine, the Citroën C6 stands out, according to the fiches-auto.fr owner reports, for the Hydractive suspension, the six-speed automatic gearbox and the alternator. We have found no recalls or official data; the model is a very niche one.[3][4]
Citroën C6 rating: acceptable reliability
Calculated using only 9 documented faults and their sources: the most serious and frequent faults weigh more. Limited evidence: it is based on few sources or few documented faults, so it is not included in the rankings. Having few documented faults does not mean it is reliable: it may simply be little studied. How it is calculated
- Engine6.1From 5.7 to 6.6 depending on the engine
- Gearbox7.91 fault
- Suspension8.11 fault and ITV (technical inspection)
- Brakes8.71 fault and ITV (technical inspection)
- Tyres and wheels10.0No documented faults
- Steering8.4Technical inspection (ITV) only: 0.6 times the defects normal for its age
- Electrical system8.61 fault
- Headlights and lights7.3Technical inspection (ITV) only: 1.1 times the defects normal for its age
- Electronics and infotainment10.0No documented faults
- Climate control10.0No documented faults
- Bodywork and interior7.9Technical inspection (ITV) only: 0.8 times the defects normal for its age
- Airbags and safety10.0No documented faults
The weak points of the Citroën C6
- 1Critical severity: Crankshaft breakage and spinning main bearing shellsTDV6 / SDV6 engine
- 2Critical severity: Broken oil pump housing and timing belt jumping on the 2.7TDV6 / SDV6 engine
- 3High severity: Turbo faults, somewhat more frequent on the sequential twin-turbo versions2.2 HDi engine
- 4High severity: Piezo injector wear and failure2.2 HDi engine
- 5High severity: Jerking and hydraulic block faults in the Citroën C6 six-speed automatic gearboxGearbox and clutch
Documented engines, from highest to lowest risk
- TDV6 / SDV62005–2010 · 2.7 HDi V6Most serious fault:Critical severityVerdict:With caution
- 2.2 HDi2006–2010 · 2.2 HDi 173Most serious fault:High severityVerdict:With cautionSafest option
The first label is the most serious fault affecting that engine in this car; the second, our verdict for the versions it is fitted to. Each engine's risk index is calculated only from the faults that affect this car (how we calculate it). We only show engines we have documented with sources: if yours does not appear, we have not analysed it yet. View all engines
See what to check before buyingOutside the engine
Ford-PSA AJD-V6 / DT17: 2.7 TDV6 (276DT) and 3.0 TDV6/SDV6 (306DT) · Diesel
- In the C6
- 2005–2010[5]
- Name
- 2.7 HDi V6
- Faults that affect it
- 2 · all of high or critical severity
Verdict for the version it uses
2.7 TDV6 (276DT/DT17, 2004-2010)2004–2010 · 190–200 hp · 276DT, DT17
With cautionYou need to verify that the belt and oil pump have been replaced with the improved part.[6][7]
Faults that affect the C6
Only those that affect the versions and years that this car used. The TDV6 / SDV6 has 3 documented faults in total.
- Critical severityFrequency: OccasionalLubricationCrankshaft breakage and spinning main bearing shellsOn the TDV6/SDV6 in the Discovery 3 and 4, Range Rover and Range Rover Sport, crankshaft failures have been documented caused by main bearing shells that are badly seated or that spin; the engine can seize and needs replacing or rebuilding.
- Critical severityFrequency: OccasionalTimingBroken oil pump housing and timing belt jumping on the 2.7On the 2.7 TDV6 the belt tensioner is bolted to the oil pump housing; if that part gives way, the belt jumps and the engine, an interference design, can be destroyed. Specialists fit the improved pump along with the belt.
C6 TDV6 / SDV6 pageAll versions and faults of the TDV6 / SDV6
2.2 HDi
Safest optionPSA/Ford 2.2 HDi and TDCi (DW12) · Diesel
- In the C6
- 2006–2010[4]
- Name
- 2.2 HDi 173
- Faults that affect it
- 3 · 2 of high or critical severity
Verdict for the version it uses
2.2 HDi 170-175 twin-turbo (DW12 BTED4, 2005-2010)2005–2010 · 170–175 hp · DW12, DW12BTED4, ZSD-422
With cautionThe two-turbo system adds mechanical complexity; fiches-auto records a significant number of turbo cases in the twin-turbo versions, although, according to the same source, it does not amount to a chronic problem.[1][2]
Faults that affect the C6
Only those that affect the versions and years that this car used. The 2.2 HDi has 4 documented faults in total.
- High severityFrequency: OccasionalTurboTurbo faults, somewhat more frequent on the sequential twin-turbo versionsThe 2.2 HDi comes in single-turbo versions (128-156 hp) and twin-turbo versions with two turbochargers in sequence (170 hp and up). Fiches-auto does not consider it a chronic problem, but it does record a significant number of turbo cases across all power outputs, somewhat higher on the twin-turbos.
- High severityFrequency: OccasionalInjectionPiezo injector wear and failureThe 2.2 HDi uses third-generation common-rail injection with piezo injectors at up to 1,800-2,000 bar. Fiches-auto documents injector cases across several power outputs, without it being the most repeated fault, with symptoms of hard starting, jerking or higher fuel consumption.
- Medium severityFrequency: RareClutchDual-mass flywheel wear, less frequent than on other HDi enginesThe 2.2 HDi has a dual-mass flywheel but, unlike smaller HDi engines such as the 1.6 HDi, fiches-auto does not document a chronic problem: very few cases in the tables consulted. Even so, it is a wear part: vibration and knocking are the signs to watch for before buying.
Faults of the Citroën C6 outside the engine
Suspension, brakes, tyres, electronics and the rest of the car. They occur with any engine.
What the MOT inspection finds on the Citroën C6
Official Dutch MOT (APK) inspection data: 1,295 inspections of 579 cars registered between 2005 and 2012, compared with cars of the same age.
- Average
Suspension and axles· counts in the score
Defects in 8.3% of inspections; in cars of its age, 9%.
- Average
Brakes· counts in the score
Defects in 7.6% of inspections; in cars of its age, 9.4%.
- Fewer defects than average
Steering· counts in the score
Defects in 1.8% of inspections; in cars of its age, 3.2%.
- Average
Headlights and lights· counts in the score
Defects in 28.5% of inspections; in cars of its age, 26.1%.
- Average
Rust and bodywork· counts in the score
Defects in 0.8% of inspections; in cars of its age, 1.1%.
- More defects than average
Exhaust and emissions
Defects in 6.6% of inspections; in cars of its age, 4.5%.
- Average
Fluid leaks
Defects in 9.5% of inspections; in cars of its age, 7.7%.
- Fewer defects than average
Glass, wipers and mirrors
Defects in 3.9% of inspections; in cars of its age, 5.5%.
- Average
Tyres and wheels· depends mostly on maintenance
Defects in 15.8% of inspections; in cars of its age, 17.7%.
The inspection measures wear and the defects visible at a periodic check, not engine or electronics failures. Source: RDW Open Data (public domain). How we calculate it · opendata.rdw.nl
Checklist for buying a used Citroën C6
Check the advert or the paperwork to see which engine the car has and go through its section. Each point comes from a documented fault; you can tick them off as you inspect.
If it has the TDV6 / SDV6 (2005–2010)
Crankshaft breakage and spinning main bearing shells
Critical severityBroken oil pump housing and timing belt jumping on the 2.7
Critical severityIf it has the 2.2 HDi (2006–2010)
Wear parts for the Citroën C6
Brakes, wiper blades, pollen filter and battery, searched for this model. The exact part number depends on the engine and year: confirm it with the registration plate or VIN.
Brake pads
Brake discs
Wiper blades
Pollen filter
Battery
Affiliate links: if you buy from these shops, MotorFiable may receive a commission at no cost to you. Check compatibility against the registration plate or VIN before ordering. Affiliate links
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Frequently asked questions
Is the Citroën C6 reliable?
All 2 engines of the Citroën C6 that we have documented have high or critical severity faults: the TDV6 / SDV6 and the 2.2 HDi. None has a «Buy» verdict; the safest option is the 2.2 HDi, with a «With caution» verdict. Outside the engine, the Citroën C6 stands out, according to the fiches-auto.fr owner reports, for the Hydractive suspension, the six-speed automatic gearbox and the alternator. We have found no recalls or official data; the model is a very niche one.
Which Citroën C6 engine is the most reliable?
Among the 2 engines we have documented, none has a «Buy» verdict; the safest option is the 2.2 HDi, with a «With caution» verdict. The two-turbo system adds mechanical complexity; fiches-auto records a significant number of turbo cases in the twin-turbo versions, although, according to the same source, it does not amount to a chronic problem.[1][2]
What problems does the Citroën C6 have apart from the engine?
Outside the engine, the Citroën C6 stands out, according to the fiches-auto.fr owner reports, for the Hydractive suspension, the six-speed automatic gearbox and the alternator. We have found no recalls or official data; the model is a very niche one. The most important documented faults are: jerking and hydraulic block faults in the Citroën C6 six-speed automatic gearbox (gearbox and clutch, high severity), hydractive suspension faults on the Citroën C6: leaks, height sensors and spheres (suspension, medium severity), alternator failure and battery problems on the Citroën C6 (electrical system, medium severity) and ABS sensor failure on the Citroën C6 (brakes, low severity).[3][4]
What faults does the Citroën C6 have?
The most important by severity and frequency, on the engines we have documented, are: crankshaft breakage and spinning main bearing shells (TDV6 / SDV6, critical severity), broken oil pump housing and timing belt jumping on the 2.7 (TDV6 / SDV6, critical severity), turbo faults, somewhat more frequent on the sequential twin-turbo versions (2.2 HDi, high severity), piezo injector wear and failure (2.2 HDi, high severity) and dual-mass flywheel wear, less frequent than on other HDi engines (2.2 HDi, medium severity).
What is the best year to buy a Citroën C6?
According to our rating by year, the best are 2012 and 2011 (7.0/10); the worst rated is 2005 (6.3/10). Each year's rating counts only the engines sold that year and the faults that affect those units: open each year to see what changes.
Sources
Every fact on this page links to its source. If you find an error, let us know.
- Essai, avis et fiabilité des 2,2 HDI 204 chevauxFiches-Auto · Motoring press · consulted 27 September 2026 · in French
- Essai, avis et fiabilité des 2,2 HDI 136 chevauxFiches-Auto · Motoring press · consulted 27 September 2026 · in French
- Tous les problèmes sur Citroën C6 2005-2012 (151 témoignages)fiches-auto.fr · Other source · consulted 5 October 2026 · in French
- Citroën C6 (Wikipedia, español)Wikipedia · Other source · consulted 5 October 2026 · in Spanish
- Ford AJD-V6/PSA DT17 engineWikipedia · Other source · consulted 5 October 2026
- TdV6 Timing BeltLes Richmond Automotive (lrautomotive.com.au) · Technical documentation · consulted 5 October 2026
- Land Rover 2.7 TDV6 Timing Belt Replacement GuideBudget Parts (roverparts.eu) · Technical documentation · consulted 5 October 2026
- Land Rover & Jaguar SDV6/TDV6 Crankshaft RepairJLR Engines · Technical documentation · consulted 5 October 2026
- Land Rover Discovery TDV6 engine failures making headlinesLandyOnline · Other source · published October 2015 · consulted 5 October 2026
- TDV6 crankshaft failure (hilo)RRSPORT.CO.UK · Owners' forum · consulted 5 October 2026