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  How do taxi firms get around DPF problems? 30 Aug 2016 (Ask HJ)
  I'm considering purchasing a used Renault Trafic, although my question is about DPFs in general. So to start regeneration you should be driving motorway...
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  Should I buy a car if the DPF light is on? 6 Nov 2014 (Ask HJ)
  I am considering purchasing a 2005 Volvo V70 2.4 D S for about £5000. The dealer allowed me to take the car to my mechanic to give it the once over and...
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  DPF problems - on all cars? 25 May 2013 (Ask HJ)
  You often point out the problems of failing DPFs on higher mileage diesels, especially in Volkswagen models. Does the same apply across all manufacturers...
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  How to fix a 307's worn our DPF? 28 Jan 2013 (Ask HJ)
  I have a Peugeot 307 SW HDI, bought new, 2002 or 2003 (not ex fleet!). 83,000 miles. I know the DPF needs dealing with but can a local service centre clean...
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  DPF replacement - what needs to be done? 20 Oct 2011 (Ask HJ)
  I'm having the DPF replaced on my 2005 Ford Focus 1.6TDCI as I have a fault saying that the DPF has reached its maximum regenerations. I'm having it...
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  Will a pick-up's DPF be okay with mostly short trips? 15 May 2020 (Ask HJ)
  I currently have a BMW 1 Series diesel that has a DPF fitted. I drive two daily trips of 15 miles with quite a bit of traffic. Over six years of ownership,...
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  OEM DPF not fit for purpose 20 Jun 2013 (Ask HJ)
  I have recently had the diesel particulate filter replaced on my 2008 Vauxhall Zafira, which has covered 50,000 miles. The DPF was diagnosed as being blocked...
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  Can DPF filters be removed or bypassed? 22 Aug 2010 (Ask HJ)
  In view of the problems with DPF filters is there any reason why they cannot be bypassed or disconnected? I appreciate that this would lead to a failure...
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  Should we use diesel additive in our engine to keep it in good condition? 30 Mar 2013 (Ask HJ)
  We are focusing on news regarding fuel additives for use in diesel engines. With diesel cars now over 50 per cent market share in the UK, and very significant...
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  Does the Mazda 3 suffer from DPF problems? 11 Jan 2015 (Ask HJ)
  Which DPF system is on 2013 Mazda 3 1.6 diesel and do you recommend buying one if doing 7000 miles a year?
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  Mitsubishi Outlander - does it suffer with DPF problems? 25 Mar 2014 (Ask HJ)
  Can you tell me if the 2007 Mitsubishi Outlander 2.0 diesel suffer with DPF problems?
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  Avoiding a DPF with an X-Type 3 May 2013 (Ask HJ)
  I like the X-Type but hate DPFs. Do any early X-Types come without them? I don't expect any estates are free from them.
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  Particulate particulars 1 Jun 2011 (Ask HJ)
  Please explain why Mazda 6 2.2L diesels do not have the same DPF problems as the Mazda 6 2.0L diesel (where the sump can fill up with diesel oil)?
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  Should I disconnect the DPF? 25 Jul 2022 (Ask HJ)
  What is your advice on disconnecting a DPF from a diesel car and running it without one?
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  Are engine revs raised during DPF regeneration? 30 Jul 2019 (Ask HJ)
  Are engine revs raised during DPF regeneration on a Nissan Qashqai?
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  The DPF light has come on in my Audi Q3 - is this caused by the emissions update? 10 Jan 2018 (Ask HJ)
  The DPF warning light has come on in my Audi Q3. It had the emissions update in March 2017. Audi have said that they will charge me £60 for diagnostics....
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  The DPF on my BMW 5 Series is blocked - can I add something to clean it? 2 Oct 2017 (Ask HJ)
  The DPF on my BMW 5 Series is blocked. Can I add something to clean it as I only do short journeys, or should I give the car a good run on the motorway?
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  Can a car dealer be held liable over a missing DPF? 24 Nov 2016 (Ask HJ)
  Can you clarify the situation regarding DPFs? What would happen if a used car was bought from a dealership and subsequently (after two years) found that...
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  Why does my Nissan Navara need a new DPF? 26 Oct 2016 (Ask HJ)
  I own a 2016 Nissan Navara, which needs a new DPF after just four months. This is my 4th Navara and never had issues before. There is no mention of the...
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  When did vans such as the Ford Transit and Toyota Hiace start using DPFs? 29 Aug 2010 (Ask HJ)
  If I am looking for a diesel Transit or Toyota Hiace, which year should I look for to find the latest model without a DPF? Does the Hyundai i800 have a...