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Any - Diesels less reliable, and more expensive to fix - CK91437
Diesel cars are more than three times as likely to break down than petrol - and they're 20% more expensive to fix

No wonder diesel sales are down.

Any - Diesels less reliable, and more expensive to fix - argybargy

I discarded the idea of buying a diesel, not because I had concerns about reliability but because the emissions scandals seem to have knocked a nail into the coffin of the genre which is impossible to pull out.

Residuals MUST be suffering because of that, surely?

Any - Diesels less reliable, and more expensive to fix - SLO76
It’s simple... turbo diesels are more complex thanks in part to all the emissions control equipment they carry. The quest for ever higher mpg and ever lower tailpipe emissions and the lower taxes that encourage it have seen a massive amount of tech piled onto Diesel engines that were at one time far more reliable and longlived than their petrol counterparts.

Ford Sierra 2.3D, Granada 2.5D, Nissan Bluebird 2.0D, Toyota Carina 2.0D, Cavalier 1.7 TD and Peugeot 406 2.0 HDi 8v all could close in on a million miles as taxis if well maintained without catastrophic and costly failures but today’s DPF strangled, DMF equipped diesels with ultra high pressure injection systems and multi-vane turbos, sometimes two of them etc etc etc will almost certainly be unviable well before their elderly counterparts time.

Fine if you’re buying new or nearly new with a short term mindset but they’re best avoided beyond 6-7yrs and 70-80k unless you’ve access to cheap repairs.

Edited by SLO76 on 23/01/2018 at 08:59

Any - Diesels less reliable, and more expensive to fix - Avant

CK - you've come on here several times to tell us about cars that you don't like. Do please tell us what you DO like: your experience could be helpful and valuable.

I often wonder what the sample sizes are in surveys like the one on reliability in the Mail (link above). Apparently Skoda diesels have a 9% failure rate (however that mght be calculated), but with Audi diesels it's 26%.

All Audi and Skoda diesel mechanicals are the same apart from the Audi V6, which as far as I know doesn't have a particularly bad reputation, or indeed sell in such huge quantities as to skew the survey.

Any - Diesels less reliable, and more expensive to fix - Bianconeri

CK - you've come on here several times to tell us about cars that you don't like. Do please tell us what you DO like: your experience could be helpful and valuable.

I often wonder what the sample sizes are in surveys like the one on reliability in the Mail (link above). Apparently Skoda diesels have a 9% failure rate (however that mght be calculated), but with Audi diesels it's 26%.

All Audi and Skoda diesel mechanicals are the same apart from the Audi V6, which as far as I know doesn't have a particularly bad reputation, or indeed sell in such huge quantities as to skew the survey.

Ah, but you see it illustrates that those unreliable KIAs have a 29% failure rate........

Metallic green cars, can’t trust ‘em, really unreliable and no manufacturer support. It’s all over the internet you know.
Any - Diesels less reliable, and more expensive to fix - Andrew-T

<< Metallic green cars, can’t trust ‘em, really unreliable and no manufacturer support. It’s all over the internet you know. >>

Oh dear, I've got two of those, and they are both 25+ years old .....

Any - Diesels less reliable, and more expensive to fix - John F

<< Metallic green cars, can’t trust ‘em, really unreliable and no manufacturer support. It’s all over the internet you know. >>

Oh dear, I've got two of those, and they are both 25+ years old .....

So have I. Focus (17) and TR7 (38). Average age 27. Both reliable, used regularly, cheap and easily available service items and spares if they ever go wrong.

Any - Diesels less reliable, and more expensive to fix - SLO76
“I often wonder what the sample sizes are in surveys like the one on reliability in the Mail (link above). Apparently Skoda diesels have a 9% failure rate (however that mght be calculated), but with Audi diesels it's 26”

These surveys have to be properly analysed before conclusions are made. Skoda always does far better than other VAG brands despite having identical running gear but when you look at the typical respondents the Skodas are usually covering far lower mileages on average plus more often than not they’re privately owned and were bought to replace an older motor while VW’s and Audi’s are nearly always company motors or leased or on PCP with an owner who’s used to newish motors and tends to pound motorways etc. The cars see heavier use and owners have higher expectations. We used to see the same thing with Proton and Mitsubishi. Both always scored well but Mitsubishi punters were much more likely to complain about something as they had higher expectations and usually came from a relatively new trade in unlike the Proton punters who were delighted after running an old Lada, Nova or Fiesta.

Edited by SLO76 on 23/01/2018 at 09:24

Any - Diesels less reliable, and more expensive to fix - Mr Carrot Cake
“I often wonder what the sample sizes are in surveys like the one on reliability in the Mail (link above). Apparently Skoda diesels have a 9% failure rate (however that mght be calculated), but with Audi diesels it's 26” These surveys have to be properly analysed before conclusions are made. Skoda always does far better than other VAG brands despite having identical running gear but when you look at the typical respondents the Skodas are usually covering far lower mileages on average plus more often than not they’re privately owned and were bought to replace an older motor while VW’s and Audi’s are nearly always company motors or leased or on PCP with an owner who’s used to newish motors and tends to pound motorways etc.

Hmm, Skodas are very popular taxi and private hire cars.

Any - Diesels less reliable, and more expensive to fix - SLO76
“Hmm, Skodas are very popular taxi and private hire cars.”

Correct but when you look into the data on these surveys the average mileage is much lower than the equivalent VW or Audi. Seems taxi drivers are too lazy/busy/grumpy to fill them in.
Any - Diesels less reliable, and more expensive to fix - Mr Carrot Cake
“I often wonder what the sample sizes are in surveys like the one on reliability in the Mail (link above). Apparently Skoda diesels have a 9% failure rate (however that mght be calculated), but with Audi diesels it's 26” These surveys have to be properly analysed before conclusions are made. Skoda always does far better than other VAG brands despite having identical running gear but when you look at the typical respondents the Skodas are usually covering far lower mileages on average plus more often than not they’re privately owned and were bought to replace an older motor while VW’s and Audi’s are nearly always company motors or leased or on PCP with an owner who’s used to newish motors and tends to pound motorways etc.

Hmm, Skodas are very popular taxi and private hire cars.

Any - Diesels less reliable, and more expensive to fix - RT

CK91437 - can you recommend a good brand of shoes - it';s seems to be the only thing you don't have a big down on.

Any - Diesels less reliable, and more expensive to fix - argybargy

To be fair to CK, I don't see this as a particularly unwelcome intervention if it stimulates debate rather than acrimony.

Diesels are going through a bad patch right now. I've seen numerous posts on this forum which, although expressed in varying ways, have featured the sentiment "I wouldn't normally consider a diesel...but".

At one time diesels were the saviours of our planet, and now they're not. It'll take a little time for the brand to regain public trust, if indeed there are years enough for that to happen before electric cars become the norm.

And (edit) as SLO says above, they are impossibly complex compared to their ancestors. I was counselled against diesels a few years back, before the emissions data scandals, when someone in the trade warned me of the cost of replacing the various bits and pieces that could fail under the bonnet of a modern Astra turbo diesel.

Meantime sales must surely be down.

Edited by argybargy on 23/01/2018 at 09:18

Any - Diesels less reliable, and more expensive to fix - Bromptonaut

Interesting stats but they're based on a warranty company's figures, presumably for those repairs it has paid out on. The numbers tell us something but there are a lot of caveats and probable distortions for small sample size with at least some marques.

The fact that it's reported by the Daily Mail adds another layer of innacuracy too.

Any - Diesels less reliable, and more expensive to fix - Andrew-T

I was counselled against diesels a few years back, before the emissions data scandals, when someone in the trade warned me of the cost of replacing the various bits and pieces that could fail under the bonnet of a modern Astra turbo diesel.

My Pug 207SW diesel has just passed its 10th birthday - it came off the line in January 2008 - and in the 9 years I have owned it, I have spent nothing on fixes except normal servicing, brakes and tyres (you are probably tired of hearing this). But when I bought it I asked the salesman about DPFs (at the time the 110 had one, the 90 not) and he said I was better off without one. Presumably since then everything has got more complicated.

Overcomplexity is usually a bad idea, for almost anything.

Any - Diesels less reliable, and more expensive to fix - gordonbennet

The Diesel problems are mixed and this misleading click bait article hasn't helped...though it should help canny buyers pick up their well chosen Diesels even cheaper.

The right Diesels bought with sensible use in mind, maintained properly (giving the maker's typical service schedule a good ignoring) and driven with some mechanical sympathy, can and will last just as long as they once did.

There are makes to avoid, and Diesel engines to avoid, but then there are petrol engines to avoid too.

Any - Diesels less reliable, and more expensive to fix - Gibbo_Wirral

Aside from taking that article with a huge pinch of salt, I'd love to know more about the failures and what caused them.

I'm astounded at the number of diesel owners who don't know about local driving, DPFs, additive (and drive the car without any), or the turbo idling rule.

I've owned diesels for many years and aside from wear and tear items, never needed to do anything aside from get the injectors cleaned on one car.

Any - Diesels less reliable, and more expensive to fix - movilogo

Diesel engine is more complex, suffers from more stress and vibration hence more expensive to buy. There are more things to go wrong (compared to petrol) and hence less reliable.

Diesel's only advantage is better mileage - so for people doing 20k miles for more diesel probably still makes sense.

Any - Diesels less reliable, and more expensive to fix - argybargy

One thing about old CK...they may complain every time he posts something, but he gets us talking.

Good effort, CK. ;0)

Any - Diesels less reliable, and more expensive to fix - Engineer Andy

One thing about old CK...they may complain every time he posts something, but he gets us talking.

Good effort, CK. ;0)

IMHO - Don't feed the troll - in my view, his main aim is still to diss Kia, even if it is tangentially. Its not as though this subject hasn't been discussed in other threads before...plus he doesn't ever seem to give any 'positive' advice - just 'this is rubbish', 'don't buy that' (especially Kias), etc without much in the way of evidence, as others have said above, plus he rarely, if ever, responds to questions or (including polite) criticisms about his posts. I'm more wary of newer members taking his comments for more than they are.

Edited by Engineer Andy on 23/01/2018 at 14:28

Any - Diesels less reliable, and more expensive to fix - argybargy

One thing about old CK...they may complain every time he posts something, but he gets us talking.

Good effort, CK. ;0)

IMHO - Don't feed the troll - in my view, his main aim is still to diss Kia, even if it is tangentially. Its not as though this subject hasn't been discussed in other threads before...plus he doesn't ever seem to give any 'positive' advice - just 'this is rubbish', 'don't buy that' (especially Kias), etc without much in the way of evidence, as others have said above, plus he rarely, if ever, responds to questions or (including polite) criticisms about his posts. I'm more wary of newer members taking his comments for more than they are.

With respect, Andy, if the forum operated a rule that we were only allowed one opportunity to discuss each motoring related topic, we'd soon run out of stuff to talk about.

And he's not the only one who sometimes lacks constructive views on those topics. Being relatively short of motoring knowledge I tend to respond to OPs with anecdotes rather than advice.

Maybe I'm a troll too.;0)

Any - Diesels less reliable, and more expensive to fix - Engineer Andy

One thing about old CK...they may complain every time he posts something, but he gets us talking.

Good effort, CK. ;0)

IMHO - Don't feed the troll - in my view, his main aim is still to diss Kia, even if it is tangentially. Its not as though this subject hasn't been discussed in other threads before...plus he doesn't ever seem to give any 'positive' advice - just 'this is rubbish', 'don't buy that' (especially Kias), etc without much in the way of evidence, as others have said above, plus he rarely, if ever, responds to questions or (including polite) criticisms about his posts. I'm more wary of newer members taking his comments for more than they are.

With respect, Andy, if the forum operated a rule that we were only allowed one opportunity to discuss each motoring related topic, we'd soon run out of stuff to talk about.

And he's not the only one who sometimes lacks constructive views on those topics. Being relatively short of motoring knowledge I tend to respond to OPs with anecdotes rather than advice.

Maybe I'm a troll too.;0)

I never said we should operate such a rule, however, as other members have commented here, and yes, in their view (as well as mine), I think we should be wary of CK's motives as to starting and participating is discussions, given previous experience. Giving anecdotes is fine, as long as say that's what they are - a personal experience. Pretending they apply to an entire manufacturer or cars with certain types of engines is another thing entirely, hence my concerns.

Tabloids like the Daily Mail (even the Telegraph isn't what it used to be, especially in the Motoring Section, HJ's collumn excepted) isn't in my view exactly the best source for high quality journalism on such matters, especially as the survey quoted does not seem to take into account the type of usage the cars get (as others have said in this thread, and, it must be said, many times before in other threads, including ones active now) as well as servicing. Personally speaking, I don't think posting the article brings anything new to the discussion. You may disagree. Fair enough.

Have a great evening, and no, you're not a troll.

Any - Diesels less reliable, and more expensive to fix - argybargy

"I never said we should operate such a rule, however, as other members have commented here, and yes, in their view (as well as mine), I think we should be wary of CK's motives as to starting and participating is discussions, given previous experience. Giving anecdotes is fine, as long as say that's what they are - a personal experience. Pretending they apply to an entire manufacturer or cars with certain types of engines is another thing entirely, hence my concerns.

Tabloids like the Daily Mail (even the Telegraph isn't what it used to be, especially in the Motoring Section, HJ's collumn excepted) isn't in my view exactly the best source for high quality journalism on such matters, especially as the survey quoted does not seem to take into account the type of usage the cars get (as others have said in this thread, and, it must be said, many times before in other threads, including ones active now) as well as servicing. Personally speaking, I don't think posting the article brings anything new to the discussion. You may disagree. Fair enough.

Have a great evening, and no, you're not a troll."

Thanks for that, and especially for being so kind about genuine anecdotal contributions.

We do disagree on this to some extent, and the reason for that disagreement is something you've already touched upon yourself. Its easy to ignore any poster if you don't think they contribute in a constructive way. My problem concerns the number of times that someone writes a long post condemning somebody else for contributing nothing, and by doing so achieves exactly the same feat: contributing nothing. But I'm not admin here, so have no power to change anything, only to comment on it. And look, by writing this I just contributed nothing.

I hope you had a great evening also, and for the record I enjoy your articulate and invariably fact and experience-based contributions.

Edited by argybargy on 23/01/2018 at 23:11

Any - Diesels less reliable, and more expensive to fix - corax

Aside from taking that article with a huge pinch of salt, I'd love to know more about the failures and what caused them.

I'm astounded at the number of diesel owners who don't know about local driving, DPFs, additive (and drive the car without any), or the turbo idling rule.

I've owned diesels for many years and aside from wear and tear items, never needed to do anything aside from get the injectors cleaned on one car.

That's a large part of the problem. There is a certain way to drive and treat a modern diesel and I doubt a large part of the population has ever been told how or wants to know. If you have a shred of motoring sympathy and understanding of what is good for them you will be able to make one last well, notwithstanding those nasty little details like fine gauze filters in the oil feed pipe slowly killing the turbo on the DV6 engine, how the average bod is supposed to know without detailed research is anyones guess.

If I'm stopping and starting down a busy dog eat dog road with the window open, you can hear the abuse that drivers are giving the whole drivetrain.

I can understand how many people here would want to buy one as new as possible to avoid all this mistreatment.

Any - Diesels less reliable, and more expensive to fix - barney100

Not in my experience, last Volvo diesel made 200,000k and the engine wasn't the thing that did for it. Present V70d4 estate has just got to !00,000k (10 years old) without drama. In three years my two diesel cars have needed the AA once for a fuel problem on the SLK 250d. Got the Volvo serviced for £110 but the downside was the other £300 odd for discs and pads on the front and pads on the back.

Any - Diesels less reliable, and more expensive to fix - sandy56

No problems with diesels in my experience. My last two cars were well used diesels, and in seven plus years of motoring no unexpected bills at all. My latest car is also diesel.

Any - Diesels less reliable, and more expensive to fix - Steveieb
Surprised that the 1.9 Tdi PD didn't get a mention on SLO s list . Still to be seen as local taxis on Passats dating back to 2004 !

But watching the latest Grand Tour when the lads after calculating that in a lifetime you spend 43 days of your life waiting to fill up because the person in front has decided to do the weekly shopping, they built a refuelling system which was to work on the move. Needless to say the petrol Superb caught fire.

it reminds me that when I fill up my A 4 Tdi PD I will not need to visit these places for another 700 miles.
Any - Diesels less reliable, and more expensive to fix - SLO76
“Surprised that the 1.9 Tdi PD didn't get a mention on SLO s list . Still to be seen as local taxis on Pass”

Good point, forgot probably the best 4cyl Diesel of its time. Another mega miler if looked after.

Edited by SLO76 on 23/01/2018 at 20:28

Any - Diesels less reliable, and more expensive to fix - xtrailman

Its a survey comparing old cars were the petrol engines are mainly simple NA types.

All that is changing now as most modern petrol engines are going turbo, so just as complicated as diesel, future petrol cars will all have a particulate filter to meet emmisions.

Mazda are unique in still selling NA petrol engine, although they now offer a 2.5T petrol in some models world wide. But the skyactive engines are both at the same compression ratio of 14.1 high for a petrol but low for a diesel.