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Cars with high fault rates according to Which - Steveieb

Would the back room members agree with this list of mostly German cars which suffered mostly from emission and fuel problems.

Alpine 2018

Audi A1 2010 -18

Audi A3 2012 -20

Audi A3 2020

BMW 1 2019

BMW 5 2011 -23

MB C class 2014 -21

Cars with high fault rates according to Which - badbusdriver

Would the back room members agree with this list of mostly German cars which suffered mostly from emission and fuel problems.

Seems a bit vague, certainly more so than would, by itself, put me off any of them if my heart was set.

But it would surely come as no surprise that issues affecting an A1 would also affect an A3 given the crossover of parts.

And given the A110 shares engine and DCT box with the Megane RS, it seems inexplicable that Alpine is mentioned yet Renault isn't?.

Cars with high fault rates according to Which - gordonbennet

Somewhat surprised to see MB mentioned, previous models given some decent servicing have been pretty bulletproof.

Cars with high fault rates according to Which - SLO76
Mostly diesels.
Cars with high fault rates according to Which - primus 1

Saw a similar thing on carwow, warranty wise , who cover aftermarket warranty repairs listed the bmw i8 as the most unreliable car, LR/RR had a couple in there with the most expensive repair was to a discovery which was over £32 k for an engine fault..

Cars with high fault rates according to Which - Adampr

Normally, these things are driven by data from warranty companies and relate to the cost of repairs. Because 'premium' brands cost more to repair, they are rated as less reliable.

For the vast majority of (but certainly not all) car owners it's completely irrelevant as they get rid of their cars once the warranty expires. Second owners are more concerned but (should) have factored the cost of repairs into the price they pay for the car.

Of far more use would be data on how many times a car under the manufacturer's warranty has to go back to the dealer. That would give a measure of the inconvenience, rather than how much it would have cost theoretically.

Cars with high fault rates according to Which - FiestaOwner
Of far more use would be data on how many times a car under the manufacturer's warranty has to go back to the dealer. That would give a measure of the inconvenience, rather than how much it would have cost theoretically.

Completely agree with this ^^^^.

Would also add to this, the number of days the car is off the road for too (ie at the dealers and awaiting for the dealer to accept it into their workshops. Many have a wait of several weeks when booking a car in).

Cars with high fault rates according to Which - Steveieb

SLO is right.

The MB C class 2015 onwards refers to diesel emissions problems .

Cars with high fault rates according to Which - FiestaOwner

Would the back room members agree with this list of mostly German cars which suffered mostly from emission and fuel problems.

Alpine 2018

Audi A1 2010 -18

Audi A3 2012 -20

Audi A3 2020

BMW 1 2019

BMW 5 2011 -23

MB C class 2014 -21

Don't subscribe to Which. Seems strange though that Audi didn't do well, when Škoda, SEAT and VW don't get a mention (despite sharing Engines as well as many other parts). Or could the issues be caused by the drivers not driving with a degree of mechanical sympathy?

Cars with high fault rates according to Which - Steveieb

One omission

VW Tiguan 2008 -16 Suspension parts.

Take the point about other VAG products but They do seem to feature consistently in the report ?,

Cars with high fault rates according to Which - Engineer Andy

The problem with many of these 'reports' or 'surveys' IMHO is that they are very subjective, and often (if not always) don't take into account:

The level of tech on a car (the more it has, the more to go wrong and more complex interactions that are likely never to have been tested during the R&D phase;

The age and condition of the car when bought;

What type of car it is (performance, off-roader, standard, luxury etc) and how it has (previous owners) and is being used - as intended, sympathetically or otherwise (even if unintended), and includes local driving/storage conditions that can impact on reliability and mileage;

The quality of the maintenance undertaken (not just now under its current owner);

The mix of engine and fuel types.

I wouldn't be surprised if many car owners distort the truth about their ownership experience - good and bad - to fit their narrative about their situation, including pretending an average car is still a 'great buy' to make their abilities to seek out good cars far better than it actually is, blaming the local dealer for issues caused by unsympathetic driving, making a proverbial mountain out of a molehill on certain issues, etc.

It's why most reviews these days tend to be a mix of 10/10s and 1/10s. It's the same reason why most drivers think they are 'above average' in terms of ability.

Cars with high fault rates according to Which - Steveieb

In the review of Best cars under £5k I agree with the choice of Honda Accord Estate 2011 on wards but in choosing the Lexus IS 2007 as a best buy both in petrol and diesel format there is no mention of the well documented problems with the diesel 2.2 engine

Cars with high fault rates according to Which - JonestHon

In the review of Best cars under £5k I agree with the choice of Honda Accord Estate 2011 on wards but in choosing the Lexus IS 2007 as a best buy both in petrol and diesel format there is no mention of the well documented problems with the diesel 2.2 engine

I am not surprised about the IS250 of those years, we are running one from 40k since 2019, now on almost 70k and for a 17 years old rig it is giving no bother other than consumables. It is not particulary cheap to run but it is economical in it's own way considering that it is simpler than most cars sold today and stick to good quality KISS principals and they are made in Japan. Juice consumption is 30 mpg town and 40 on the motorway but it is a 1600kg car after all.

The IS220D was a dog in many cases but not unusual for a diesel and came with the usual issues inflicted on modern cars running derv.

Edited by JonestHon on 28/05/2024 at 14:17

Cars with high fault rates according to Which - Palcouk

I stopped subscribing to Which some years ago. In one year of Which "best buys" I made the point that all small & family cars featured were deisels, and that the Which subscribers were likely to be older and as such low annual miles, which would result in problems for diesels. The response from a Which person was that her company car was problem free.

Cars with high fault rates according to Which - Engineer Andy

I stopped subscribing to Which some years ago. In one year of Which "best buys" I made the point that all small & family cars featured were deisels, and that the Which subscribers were likely to be older and as such low annual miles, which would result in problems for diesels. The response from a Which person was that her company car was problem free.

IMHO, Which? magazine are a pale imitation of their former selves, but then so are most of the 'legacy media' since the mid 2000s - 2010. Proper journalism is rare nowadays, with many of the 'old guard' nearing or past retirement age, and many have given into their new, younger editors and just parrot the 'company line' or spew out naff articles with little in the way of genuine investigative research aside from a trawl on the Interwebs of other 'articles' to copy 'n' paste with a few changes here and there to avoid legal entanglements.

Cars with high fault rates according to Which - Big John

Tesla model S - one star

Re VAG I wonder what Audi do so different to other VAG cars A1 & A3 mostly one star? Seat, Skoda, and even VW generally better - except the one star VW Tiguan & Golf SV.

Lexus and Toyota top of the bill though....

Cars with high fault rates according to Which - Terry W

The WHICH car survey is based upon 50,000 responses to a car survey amongst members.

The reliability score is based on number of breakdowns and the severity of the fault.

There are a few points which may distort the results:

  • Which subscribers are probably not representative of the average car owner - I would guess typically more cautious and responsible as car owners and drivers
  • it is not clear from a brief look what the sample size is for individual models
  • premium brands will tend to be more complex, thus fail more frequently, and cost more to repair

Generally which tend towards integrity in their reporting - that is their reason for existing - and I would personally place a high level of confidence in their conclusions. Certainly above the anecdotal!

Cars with high fault rates according to Which - edlithgow

"Would the back room members agree with this list of mostly German cars which suffered mostly from emission and fuel problems."

"Agree" doesnt seem an appropriate term.

My understanding is they report the experience of their members, as "data". Likewise the warranty outfits report on their claims, as "data"

This is not a matter of opinion, so its not something that I, or anyone else, can "agree" or "disagree" with.

Edited by edlithgow on 27/05/2024 at 03:47

Cars with high fault rates according to Which - Falkirk Bairn

The solution seems to be buying Japanese or Korean petrol, petrol hybrid cars make more sense on the reliability front especially in the older 2nd hand market.

I have issues with "Which Data" - you do not get accurate data restricting yourself to subscribers.

IMHO Which has a niche market - many older citizens when older people often have different circumstances / views to the middle aged or the young. I only know of oldies reading Which.

I am not prejudiced against "older citizens" being 78 this year.

Cars with high fault rates according to Which - Engineer Andy

The solution seems to be buying Japanese or Korean petrol, petrol hybrid cars make more sense on the reliability front especially in the older 2nd hand market.

I have issues with "Which Data" - you do not get accurate data restricting yourself to subscribers.

IMHO Which has a niche market - many older citizens when older people often have different circumstances / views to the middle aged or the young. I only know of oldies reading Which.

I am not prejudiced against "older citizens" being 78 this year.

What often makes a BIG difference to how reliable a car is in older age is both how it was driven (sympathetically or not) and well it was maintained. I've come across cars from makes considered to be reliable / long-lived that are in a terrible state for their age; others from those not anywhere near as in the opposite condition.

As we know, cars can have large mileages under their belt and be in great nick (e.g. well-cared for diesels doing mostly motorway driving) and those with small mileages may or may not - because it depends how it was done (lots of short trips or less frequent, longer trips where the car fully warmed up) - especially as regards to the condition of the battery (including for self-charging hybrids), tyres and brakes.

Where a car has been kept - garaged (whether in a well-ventilated, dry or damp environment or not), under trees (sap or bird poo damage to the paintwork) or - at some point in its life (won't be able to know unless it's had one owner who can prove where they've lived throughout its life) general location (seaside or in an area that gets lots of snow/is heavily gritted regularly) and may suffer more from rust, but which may not be easily seen (underneath).

I also think it helps in that regard that a car only has one previous owner (not counting [say] a dealer or hire car firm where the car wasn't used [when new] outside of moving it around on the lot/showroom) and where they are willing to show you all the receipts for maintenance.

Cars with high fault rates according to Which - John F

Depends on the 'fault' and the 'rate'. I never look at these surveys as the only faults I'm interested in are ones that occur suddenly out of the blue which stop the car and require recovery, and those costing more than £100 to fix. It never ceases to amaze me when travelling long distance in the UK on busy crowded roads how few broken down cars are seen waiting for rescue. The rate of such immobilising faults must be vanishingly small in most makes of car these days. In hundreds of thousands of miles over the past 40 yrs I can remember only two occasions when the car had to be trailered home. One was my fault for replacing a length of corroded fuel line with a spare length of rubber from a sc***ped washing machine. Little did I know the fuel pressure was high enough to rupture it! The other was a sudden snapping of the front anti-roll bar on my first Audi - after well over 100,000 it had developed a crack which had rusted.

Edited by John F on 27/05/2024 at 10:47

Cars with high fault rates according to Which - edlithgow

I've always driven bangers, with the exception of company cars, and a fairly shiny dealer-maintained Renault 5 I took over from my mother when she stopped driving.

The Renault 5 is the only one to suffer a catastrophic failure en route (wiring loom melted down) and even it was limpable once the smoke had cleared, if you could do without the disconnected culprit cooling fan, and the indicators.

I'd doubt such failures are less common with current cars though. Bit of corrosion or water ingress and any one of the umpteen superfluous s***e modules on the CANBUS can start emitting electrical noise, and then the CANBUS...er...cant, and you are taking the bus.

It seems unlikely that this level of integration, combined with this level of complexity. makes things more reliable.

Edited by edlithgow on 28/05/2024 at 09:23