[Taransay]

I have a 2.0d on order due next month. I am reading about problems with DPF on modern diesels. Has anybody experienced problems and if so were the problems covered by the 3 year warranty?

[dnw]

Is a hypothetical mechanical issue covered by warranty? Yes. Should you worry about it before it happens? No.

[tank531]

I have been driving a German euro 5 diesel engine (fitted with a DPF) not a Beemer, for 12 months. The dealer did warn me about the filter blocking if you often do city only driving or cold start commutes, however, I have not experienced any cleaning cycle or reduced power in 25k miles. That said I am 90% highway driving. DPF's are the catalytic converter equal in a diesel - expensive to replace if you keep your F25 for high miles and many years. Whilst fuel economy and power in modern diesels are well up, long term maintenance costs could be high and remain relatively unknown with euro 5.

[April1]

Just a curiosity: why did you pick up your user name also as the thread subject?

[Dr Stig 2]

Originally Posted by Lotus7

The self-cleaning "burn-off" cycle can only happen when the car is driven at higher speeds for a while, so cars that are always driven in slow traffic can develop problems with improperly maintained DPFs.

The car automatically detects when it needs to run the self cleaning, then waits until the GPS finds you are on a major freeway. It them fully engages the accelerator and disables the brakes until the engine and exhaust temperature reaches sufficient levels to pyrolyticly burn off the soot residue. This is often seen as a flaw in the BMW design, with many owners reporting their car is accelerating out of control on the freeway and that they cannot stop the car.
Bunch of Nancies. Its designed that way. Stop whinging I say.

Originally Posted by alokbhargava

Just a curiosity: why did you pick up your user name also as the thread subject?

A more important question is why you haven't done the same thing.

[April1]

Originally Posted by Dr Stig 2

A more important question is why you haven't done the same thing.

OMG, even you didn't do it

[ricardoyak]

I have a DPF in my current car (Volvo C70 D5) for the last four years. No problems with it at all. The big risk is cold starts and city driving where the engine speeds and temps don't get high enough to burn off the soot. The car has a warning that it needs a long run before it causes damage - never seen it though.

I do 2 or 3 days per week of city commuting (8 miles each way) and one or two runs on the motorway (13 miles each way) plus maybe one journey of over 50 miles every other week.

The DPF does keep the soot down. It is the first diesel I have owned/driven that even after 4 years and 80,000 miles (I did some big distances early in its life) has absolutley no muck coming out of it even under heavy acceleration.

[Taransay]

I have spoken to my BMW Dealer who have confirmed that the DPF filter is not covered by warranty. They have told me that this part is replaced on service at 6 years or 60000 miles. I will endeavor to establish the cost. My Son in Law is having his DPF removed and a friend is having to replace his DPF on a VW at 8000 miles.

This does not put me off my eagerly awaited X3. But all Diesel drivers need to be aware of what could be a very expensive problem!

[ricardoyak]

Originally Posted by Taransay

I have spoken to my BMW Dealer who have confirmed that the DPF filter is not covered by warranty. They have told me that this part is replaced on service at 6 years or 60000 miles. I will endeavor to establish the cost. My Son in Law is having his DPF removed and a friend is having to replace his DPF on a VW at 8000 miles.

This does not put me off my eagerly awaited X3. But all Diesel drivers need to be aware of what could be a very expensive problem!

While I haven't had problems with my current car, I was made to sign a disclaimer on the X3. This pointed out the limitations of a DPF for city driving and puts me on the hook with the lease company if the DPF needs replacing because my driving habit causes it to fail early.

[nonagon]

Taransay

[Dr Stig 2]

Originally Posted by nonagon

Taransay

Nonagon

[Taransay]

I have contacted my dealer to find out the cost of replacing the DPF at 60,000. Clearly there have been crossed wires between Sales and Service. It is NOT the DPF that is replaced at 60,000 miles, its the Diesel fuel filter!!! I was assured that a DPf is good for 150,000 and that DPF's have only really been a problem on early diesels and when driven continuously on very short journeys.

[Jan van Zyl]

What emissions cleansing system/s are used on the F25 diesels?

This one - http://www.bmw.com/com/en/insights/t...ytic_converter

or this one - http://www.bmw.com/com/en/insights/t...article_filter

or both - http://www.doosanequipment.eu/assets...q_en.pdf#page9

I suppose it could vary from country to country - depending on fuel quality, and that I could also just ask the head techy at the local dealership - but first wanted to try here. Thank you.

[Bimar]

Originally Posted by Taransay

I have contacted my dealer to find out the cost of replacing the DPF at 60,000. Clearly there have been crossed wires between Sales and Service. It is NOT the DPF that is replaced at 60,000 miles, its the Diesel fuel filter!!! I was assured that a DPf is good for 150,000 and that DPF's have only really been a problem on early diesels and when driven continuously on very short journeys.

Some feedback in BMW DPF from Honest John
http://www.honestjohn.co.uk/askhj/an...rticle-filters

[Alligator69]

I drove about 200.000km on cars with DPF system. They all did very well. One thing can dramatically shorten the life of a DPF-equipped car. Too much city-only driving, that causes regeneration to trigger and dilutes the oil with Diesel (the regeneration requires an extra injection of Diesel to raise the temperatures of exhaust gas), up to a level that can cause auto combustion (I've posted a video somewhere here...).

So in the one and only case you do a lot of city driving (and only that), just pay attention to the lubricant level and if it goes over the max level, just change it.

It's an extreme case, that did happen to smaller diesel cars, but in very few cases.