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  BMW diesel particulate filters 29 Apr 2012 (Ask HJ)
  My BMW 525 diesel ( 04/54 ) has now covered 73,000 miles mainly around town with occassional long runs and the service computer is showing 90,000 miles...
• All - DPF regen and low EGTs 2 Jan 2012 (Forum)
  With DPF now effectively mandatory on all Euro V compliant diesel engines, the problem of DPF regeneration on vehicles used predominantly for short, low speed journeys is going not going to disappear any time soon. The fundamental problem is low Exhaust Gas Temperatures (EGTs) inherent
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  The Someday Smut 22 Apr 2011 (Ask HJ)
  Can you tell me what a particulate filter does and why and how often they need replacing?
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  No particulate place to go 5 Feb 2011 (Ask HJ)
  I am changing my car this year (2006/56 Mercedes E280CDI with 30k miles) and am considering either Jag XF, BMW X3 or perhaps another Merc. My concern is...
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  Do I drive enough miles a year for a diesel? 12 Jul 2023 (Ask HJ)
  I'm looking to buy a Citroen C3 Picasso, it's a 2015 diesel, and I was worried I may not do enough miles in it to keep the DPF healthy. I'll be doing about...
• Ford C-MAX - DPF replaced, rotten egg smell and amber light 14 Apr 2021 (Forum)
  up as we were discussing the car. I noticed exhaust fumes filling the cabin on the 2 hour drive home. Tried to get DPF to regen manually and then took to a garage to force it.  Neither worked.  Then Engine Management light came on.  Codes said DPF was at fault.  On Saturday
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  I didn't know short runs could damage a diesel car - should I change my diesel Mazda 6? 4 Jan 2018 (Ask HJ)
  Although I really like my diesel Mazda 6, I had no knowledge regarding the DPF i.e. short runs not doing it any good. Are there any other cars with as...
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  I want a 2007 diesel Honda CR-V for towing - will there be heavy tax penalties on old diesels? 8 Mar 2017 (Ask HJ)
  I cover about 10,000 miles per year, mostly journeys of 50+ miles. I need a 4x4 to negotiate muddy/slippery tracks and to tow a trailer. I'm looking at...
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  Can I remove the DPF from my Jaguar XF? 4 May 2013 (Ask HJ)
  I have a Jaguar XF 2.7 Diesel and probably do too many short runs for the diesel particulate filter, averaging only 8000 miles a year. So far the light...
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  Buying a used medium sized diesel - what would you recommend? 8 Apr 2013 (Ask HJ)
  I am looking to buy a medium sized diesel without DPF. After reading too many internet forums I am now unable to decide what to plump for given that there...
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  Thinking of buying a secondhand diesel - when did DPFs and DMFs appear? 21 Apr 2012 (Ask HJ)
  I am driving a 2004 Ford C-Max 1.6 diesel which is giving excellent service and fuel economy. I will keep it for a year or two longer, but I wonder about...
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  Will the Hyundai i30 make a good driving school car and will any DPF problems be covered by a warranty? 21 Jan 2012 (Ask HJ)
  I recently asked for advice on the best car for a driving instructor, and one of the recommendations was a Hyundai i10. I dismissed this as having no student...
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  Why is my Vauxhall Combo van losing power? 5 Sep 2010 (Ask HJ)
  Please could you advise what to do about a new Vauxhall Combo SE 1.3 van I bought in May 2010? It is hesitating and losing power, and our local dealer...
• Peugeot 508sw - peugeot 508sw dpf? 16 Nov 2017 (Forum)
  Hi all, just wondering whether the technical experts on here could confirm what type of DPF a 2013 peugeot 508sw has fitted. The car in question has the 2.0 HDI 140hp engine. What i would like to know is, has it the eloyses fluid based system, or has it the coated "dry" version?. I've asked
• Volkswagen Passat B7 - Revs for DPF Regen? 23 Jun 2017 (Forum)
  My Passat has had the emissions fix which I read can result in more soot and earlier DPF failure. Guidance is that I should have regular runs with revs over 2000rpm. Trouble is on motorway runs in 6th at 70mph my rpm is just below 2000rpm. So do I have to change down? How far for? etc
• Mazda 5 - How to keep dpf healthy 24 May 2016 (Forum)
  Hi i have recently bought mazda5 1.6 venture disel one.Since the disel car is something i had for the first time.So i just wanted to know few things. 1.Does it has any dpf additives? 2.How often i will need to drive in motorways and for how long? 3.If i drive 20 miles a day in cities areas
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  DPF questions 25 Nov 2012 (Ask HJ)
  I am buying an Alfa Romeo Giulietta diesel. The dealer says that the DPF problem is lessened on this car as it is higher up the exhaust system. Is that...
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  I tried to safely assist my Ford Galaxy's passive DPF regeneration - is my engine okay? 22 Mar 2017 (Ask HJ)
  I've recently purchased a 2011 Ford Galaxy 2.0 TDCi. After the local Ford dealer changed oil and all filters they advised me to (as the car was immobile...
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  Does our Mercedes-Benz C220 diesel need a new DPF? 15 Jan 2017 (Ask HJ)
  We have had a 2004 Mercedes-Benz C220 CDi automatic diesel in Spain for the last 10 years. All was fine until a week after its annual MOT last May, when...
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  Can I remove the DPF from my Land Rover Defender? 7 Sep 2013 (Ask HJ)
  I am on my second Land Rover Defender after owning many saloon cars and two SUVs. The Defender is an excellent, simple vehicle, which was the main reason...