Jaguar XF DPF filter - advice
Discussion
I have boought from a dealer a 2008 2.7 diesel and it is still under extended warranty. It was towed in for an 'unrelated' failure and after two days and 'extensive testing' it was returned without charge. After 30 minutes driving it went into restricted mode and Jaguar Assistance directed me to the nearest dealer (not my own local one). Now 10 days later I'm told it needs a new DPF filter and £1800. I feel I should not have to pay in these circumstance; any advice?
bgreen said:
, I bought it six months ago
Ok, was thinking only a matter of weeks.Jag dealers vary, from very helpful to a hard work. I've had problems recently with mine and had to bypass the dealer and spoke directly to Jaguar Customer Service. Took a while and several calls but got a result that I was happy with.
Is the light on the dash yellow or red? If yellow you can get the car to regen it self. This involves a min 20min drive of no less than 40mph. Unfortunately these cars don't like short journeys, they don't get the chance to regen.
If the DPF is buggered £1800 is steep to say the least.
There are companies that will remove the DPF, worth noting its not an MOT fail.
OP - I think the real question is what diagnostic work did the dealer do that led them to the conclusion that various parts including the DPF needed replacing?
For what it's worth I don't subscribe to the DPF being a consumable part. They should be able to be regenerated repeatedly for the life of the vehicle.
If you can, please detail everything the dealer service guy said, what codes were pulled, what work was done in detail, and what is covered by warranty, then we can figure out next steps.
For what it's worth I don't subscribe to the DPF being a consumable part. They should be able to be regenerated repeatedly for the life of the vehicle.
If you can, please detail everything the dealer service guy said, what codes were pulled, what work was done in detail, and what is covered by warranty, then we can figure out next steps.
Well, as a non-piston head I have been told very little. The first dealer had the car for extensive tests for 21/2 days after the electrics failed as it turned off (it stayed in gear etc and then didnt respond). I got it back and after 30 minutes driving south it went into the restricted mode (what a coincidence?) and so I called out Jaguar who directed me to an unrelated dealer further from home (so now an hour away) who was nearest the breakdown point as he thought one of the injectors wasn't working poperly. I have had phone calls on a daily basis but no detailed list of tests and now this is what I'm being told. The new dealer is still in dialogue with Jaguar and the first dealer, so perhaps they will deal with this in the end. Its over two weeks now since the car first failed
I assume this is a Jaguar APPROVED warranty not a Jaguar SELECT warranty. My XJR has been in for warranty work 5 times in the last 3 months, they have never given me any arguments, they just got on and fixed stuff (although I dont have a DPF). I've had new front foglights due to misting, a new supercharger belt as it was squeeking. I've also have some pipes replaced, new lambdas, multiple free diagnostics and oh a list of minor stuff fixed.
The only thing they wouldnt cover was a piece of loose trim but I knew that was excluded from the warranty but tried it on anyway
I suspect they will call this a 'service' item but for that amount of money I'd be straight on the Jaguar customer services.
The only thing they wouldnt cover was a piece of loose trim but I knew that was excluded from the warranty but tried it on anyway
I suspect they will call this a 'service' item but for that amount of money I'd be straight on the Jaguar customer services.
bgreen said:
Well, as a non-piston head I have been told very little. The first dealer had the car for extensive tests for 21/2 days after the electrics failed as it turned off (it stayed in gear etc and then didnt respond). I got it back and after 30 minutes driving south it went into the restricted mode (what a coincidence?) and so I called out Jaguar who directed me to an unrelated dealer further from home (so now an hour away) who was nearest the breakdown point as he thought one of the injectors wasn't working poperly. I have had phone calls on a daily basis but no detailed list of tests and now this is what I'm being told. The new dealer is still in dialogue with Jaguar and the first dealer, so perhaps they will deal with this in the end. Its over two weeks now since the car first failed
I have the advantage of being an Engineer, with extensive diesel experience and the further advantage of having written a lot of dealer service routines that give the most effective method of allowing a vehicle to be diagnosed effectively with optimal cost efficiency. I wouldn't be authorising any repair spending my money until I saw sufficient evidence that the dealer had performed all of the recommended diagnostic routines in the correct order and was addressing the root causes of the issue rather than addressing symptoms based on gut instinct that may be wrong. If the injector is faulty then fix that first, then any other sensors and make the dpf the last item on the list to fix.fatboy b said:
SV8Predator said:
The DPF is a consumable, so it won't be covered under any warranty.
When it's full, it's full.
Not correct. When it's full, it's full.
GavinPearson said:
For what it's worth I don't subscribe to the DPF being a consumable part. They should be able to be regenerated repeatedly for the life of the vehicle.
You obviously don't understand exactly how DPFs work.SV8Predator said:
fatboy b said:
SV8Predator said:
The DPF is a consumable, so it won't be covered under any warranty.
When it's full, it's full.
Not correct. When it's full, it's full.
GavinPearson said:
For what it's worth I don't subscribe to the DPF being a consumable part. They should be able to be regenerated repeatedly for the life of the vehicle.
You obviously don't understand exactly how DPFs work.fatboy b said:
SV8Predator said:
fatboy b said:
SV8Predator said:
The DPF is a consumable, so it won't be covered under any warranty.
When it's full, it's full.
Not correct. When it's full, it's full.
GavinPearson said:
For what it's worth I don't subscribe to the DPF being a consumable part. They should be able to be regenerated repeatedly for the life of the vehicle.
You obviously don't understand exactly how DPFs work.SV8 is correct. Regeneration gets rid of lots of particles but leaves a residue that will eventually clog the filter and cause its total failure. Estimates range between 75 and 120K for this to happen, based on car make and use.
What mileage has the OP's car done?
Its done just over 52,000 now.
It seems Jaguar Support are still considering our situation, or at least considering it in conjunction with the dealership which did the first repair under warranty two weeks ago.
THis is because the second dealer reports the first repair may have caused this secondary issue on the DPF. Its now 17 days (minus 30 minutes driving) since the car was towed away. I love jags (I had a great S Type) but my wife is rapidly losing the faith with this one.
It seems Jaguar Support are still considering our situation, or at least considering it in conjunction with the dealership which did the first repair under warranty two weeks ago.
THis is because the second dealer reports the first repair may have caused this secondary issue on the DPF. Its now 17 days (minus 30 minutes driving) since the car was towed away. I love jags (I had a great S Type) but my wife is rapidly losing the faith with this one.
bgreen said:
I love jags (I had a great S Type) but my wife is rapidly losing the faith with this one.
It seems obvious that a DPF could need replacement either because it has a service life or because of other issues in which case that's another cost that needs to be factored into the arguable,often illusory,cost savings of running a diesel also taking into account the higher price of diesel v petrol.There really isn't much point in running a diesel engined Jaguar unless it involves very high mileage use in which case a petrol converted to run on LPG seems to make more sense anyway.If I was looking for a late type Jaguar I think the choice would probably be the XJR in X350 form,or possibly an S type R,or nothing. bgreen said:
Its done just over 52,000 now.
It's certainly unusual that the DPF filter would be full at that mileage. Unusual but not impossible.It's the type of mileage that's important. If it has been mainly short journeys (less than 20 minutes, then the DPF cannot get up to temperature to work efficiently. Plus it cannot regenerate unless it gets up to (very hot) temperature and then keeps going for another half hour or so.
So short trips could have easily filled up the DPF, even at 52,000 miles.
The DPF is the second biggest con in the history of the motor car, only eclipsed by the notion that the modern diesel is 'clean'
and 'economical'.SV8Predator said:
fatboy b said:
SV8Predator said:
The DPF is a consumable, so it won't be covered under any warranty.
When it's full, it's full.
Not correct. When it's full, it's full.
GavinPearson said:
For what it's worth I don't subscribe to the DPF being a consumable part. They should be able to be regenerated repeatedly for the life of the vehicle.
You obviously don't understand exactly how DPFs work.GavinPearson said:
And even at the end of life the dpf capacity should be adequate to maintain performance.
This is simply untrue. When the DPF has regenerated a number of times the ash residue from the regeneration builds up. More regenerations means more ash. When it's full, it's full and needs to be replaced. That's why there are sensors before and after the DPF, to measure that there is a flow through it.Gassing Station | Jaguar | Top of Page | What's New | My Stuff