Auto Express's reliability ratings are based on our Driver Power survey of over 30,000 car owners. Ratings are the average for all owners of this car who responded. Individual owners’ ratings and comments appear below.
55-reg Diesel, Owner for 3 to 5 years

Very annoying designed in faults EG. cannot change lightbulbs yourself (Dealer only supply and fitting requires major strip down )Averagebill for replacing a front sidelight £150.00, and bulbs last less than 1 year
Brakes corrode rapidly and require complete replacement within 3 years
Electronics sensitive to temperature change which result in faults showing which are not there and functions such as ESP,ABS, Cruise Control disableing themselves until computer is rebooted.

The car would be excellent if these manufacturer based problems were addressed and Citroen cannot deny they excist as there is a dedicated website to the C5 problems. the latest C5 is reported to be no better.

Reliability: 3/5 Build Quality: 3/5
03-reg Diesel, Owner for More than 5 years

Lousy build quality sorted during customer ownership. Awful main dealer service, bits left off, poor work leading to other failures. Seats excruciatingly uncomfortable negate excellent ride. Rubbish headlights and you have to remove the bumper to change bulbs.

But for all that pretty good since the manufacturer 3 yr warranty ran out and servicing carried out by an independent.

Have only hung on to it to make sense of the initial eye-watering depreciation.

Reliability: 2/5 Build Quality: 2/5
05-reg Diesel, Owner for Less than a year

Apparently everything on this car is controlled "remotely" by some electronic transfer system. The accelerator just stops working and the car will only run in"tick-over" mode. After stopping and waiting for 15 - 30 minutes it will start and then run all-day perfectly. Neither the garage nor a supposed elecronic expert can cure the fault. I took the car back yet again yesterday.

Reliability: 2/5 Build Quality: 5/5
04-reg Diesel, Owner for 1 to 3 years

i had the diesel particle filter replaced cause the car kept going into limp home mode. i had this done done at a cost of £600+ vat only for problem to occur again 1000 miles later.was then told it was swirl valve that was at fault so i am now thinking that maybe the diesel particle filter wasnt faulty after all yet another main dealer letting down a customer.tut tut Citroen

Reliability: 2/5 Build Quality: 4/5
2009-reg Diesel, Owner for 3 to 5 years

24 non service visits to the dealer.bulbs, new door, new quarterlight windows because of trim.clutch and flywheel at 46k.loads of other niggly problems. Actual running of the car is ok but the price of all of the problems and the hassle makes it a nightmare plus if you include the attempted overcharges of one of the dealers it adds a considerable sum.

Reliability: 1/5 Build Quality: 1/5
03-reg Diesel, Owner for More than 5 years

It's excellent although it's beginning to look a bit tired - bashes and scrapes on the bodywork, interior getting a bit worn. A few niggling electrical problems but overall it's the best car I've ever owned. Engine is smooth and responsive, as is the ride, and has been 100% reliable. Overall I think the C5 is an excellent buy.

Reliability: 5/5 Build Quality: 3/5
09-reg Diesel, Owner for Less than a year

Excellent car for comfort and refinement once you get used to the slightly different driving style compared with Mondeos etc. It is a very relaxing way to travel and definitely reduces your likelyhood of being affected by road rage! In addition I have been very impressed with the reliability, build quality and dealer service.

Reliability: 5/5 Build Quality: 4/5
08-reg Diesel, Owner for 1 to 3 years

The new C5 is quiet, comfortable, relex and good looking inside and outside. The local dealer service isn't good though. Compares to my previous VW, it is about the same build quality and average the same numbers of faults.

Reliability: 3/5 Build Quality: 3/5
51-reg Diesel, Owner for 1 to 3 years

VERY RELIABLE,FAIR FUEL COMSUMPTION, VERY CONFORTABLE, STEERING NOT VERY DIRECT, GOOD SUSPENTION, VERY GOOD HEATING/COOLING SYSTEM AND GOOD LIGHTS, A BIT EXPENSIVE ON ROAD TAX. OVERALL I WOULD BUY THE SAME MODEL AGAIN.

Reliability: 5/5 Build Quality: 4/5
06-reg Diesel, Owner for 3 to 5 years

Almost as good as previous model but has lost some of that models finesse. (Previous was C5 2.2 diesel) This one is 2 litre diesel which goes to prove you can't get something for nothing!!

Reliability: 4/5 Build Quality: 3/5
2010-reg Diesel, Owner for 1 to 3 years

Only faults has been that the blue-tooth built in phone has stopped displaying my phone book details. and the paintwork is very easily scratched. A sixth gear would improve this.

Reliability: 4/5 Build Quality: 4/5
58-reg Diesel, Owner for 1 to 3 years

The advertising suggested it was built to German standardsbut it is not. However, the car can be described as very comfortable with adequate performance and few vices

Reliability: 5/5 Build Quality: 3/5
2009-reg Diesel, Owner for less than a year

1 fault existed at purchase, fixed under warranty, nothing else has gone wrong so far in 10k miles. Highish tyre wear, otherwise very good considering large engine.

Reliability: 5/5 Build Quality: 5/5
59-reg Diesel, Owner for Less than a year

it's ok but is too technical.
Even the main dealer cannot sort out auto air intake cut off. Very annoying behind smell vehicles such as mopeds and taxis.

Reliability: 2/5 Build Quality: 3/5
2010-reg Diesel, Owner for less than a year

I have no problems with the car's reliability. The running costs are reasonable for the size and comfort of the car.

Reliability: 5/5 Build Quality: 5/5
2009-reg Diesel, Owner for 1 to 3 years

The regulators on both front windows have had to be replaced. the reversing system is inaudible at times

Reliability: 4/5 Build Quality: 2/5
02-reg Diesel, Owner for 3 to 5 years

great engine,good fuel consumption,good load carrier-----iffy electrics and suspension rumbles

Reliability: 4/5 Build Quality: 3/5
55-reg Petrol, Owner for Less than a year

Very close to everything a car should be, but spoiled by some silly niggles.

Reliability: 2/5 Build Quality: 3/5
2008-reg Diesel, Owner for 1 to 3 years

To date it has never let me down. Main franchise is expensive but reliable.

Reliability: 5/5 Build Quality: 5/5
03-reg Diesel, Owner for 1 to 3 years

Nice car, goes well, rattles a bit but has worked hard.
Steering lock poor

Reliability: 4/5 Build Quality: 2/5
2009-reg Diesel, Owner for 3 to 5 years

The cars reliability is prity good ,its the garage whitch is the problem

Reliability: 4/5 Build Quality: 4/5
2005-reg Diesel, Owner for less than a year

Had service done 5000 miles ago no problems. Just diesel and washing.

Reliability: 5/5 Build Quality: 4/5
02-reg Diesel, Owner for More than 5 years

Unreliable electrics, Good everything else for a large familly car

Reliability: 2/5 Build Quality: 3/5
2008-reg Diesel, Owner for 1 to 3 years

Mechanically sound, but both front electric windows have failed

Reliability: 3/5 Build Quality: 3/5
2007-reg Diesel, Owner for 1 to 3 years

This is my second c5 and both vehicles have been very reliable.

Reliability: 5/5 Build Quality: 4/5
08-reg , Owner for Less than a year

Not as well built as the manufacturer would lead us to believe

Reliability: 3/5 Build Quality: 2/5
2009-reg Diesel, Owner for less than a year

So far I have not had a problem. 45mpg is good for a big car.

Reliability: 5/5 Build Quality: 4/5
2004-reg Petrol, Owner for 1 to 3 years

It's a citroen and thay can be temperermental. Average.

Reliability: 3/5 Build Quality: 2/5
2007-reg Diesel, Owner for 3 to 5 years

No problems at all. Long service intervals. very good.

Reliability: 5/5 Build Quality: 4/5
2009-reg Diesel, Owner for 1 to 3 years

Never fails, no faults at all

Reliability: 5/5 Build Quality: 4/5
07-reg Diesel, Owner for 1 to 3 years

OK but not great.

Reliability: 2/5 Build Quality: 2/5
2001-reg Diesel, Owner for 1 to 3 years

Electrics a pain

Reliability: 2/5 Build Quality: 3/5
02-reg Diesel, Owner for 3 to 5 years

very good

Reliability: 4/5 Build Quality: 4/5