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  Buying a Volkswagen Tiguan - will if suffer from DPF issues? 12 Feb 2014 (Ask HJ)
  My wife is looking to purchase a 2012 Volkswagen Tiguan and will be doing approx. 14,000 miles a year. She will be doing some motorway driving, approx....
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  Toyota Yaris DPF problems 9 Mar 2016 (Ask HJ)
  I've had to pay my Toyota dealer £275 to regenerate the DPF and change the oil on my 2015 Yaris diesel. I used Millers longlife ACEA C2 5W30 at the last...
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  Will the Skoda Octavia TDI's DPF regenerate over a 14-mile run? 9 Nov 2013 (Ask HJ)
  I currently have a pre-DPF Skoda Octavia TDI Estate and am very pleased with it. I would like to buy a new one early next year but want to check a few...
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  Do I need to replace my Mazda 3's DPF? 12 Oct 2013 (Ask HJ)
  My 4-year-old Mazda 3 1.6 diesel has done 63,000 trouble-free miles. I live in the country so don't do many short trips (the nearest shop is 7 miles away)....
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  Should a dealer warranty cover a faulty DPF? 24 Jul 2013 (Ask HJ)
  We recently purchased a 2009 Honda Accord Tourer, with 62,500 miles and dealer warranty. After three weeks, the DPF light came on and the dealership sent...
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  DPF problems after recall on Volkswagen Golf 30 Jul 2012 (Ask HJ)
  My Golf TDI GT Sport 170 was recalled and repaired due to fault with the Piezo injector. Three new injectors were fitted. I have had problems ever...
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  Part and particle 15 Aug 2011 (Ask HJ)
  I drive a 2006 BMW 320d that I have had for a year and I understand it has a diesel particulate filter. The car has covered 60,000 but I only drive about...
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  Why isn't my Volkswagen Passat's DPF clogging when I use it for just 7000 miles per year? 8 Sep 2010 (Ask HJ)
  You keep talking about the problems associated with DPFs. I have a 56-reg Volkswagen Passat TDI 140 and I only do 7000 miles a year. My daily commute is...
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  Does my 2010 Honda CR-V 2.2 i-DTEC ES have a DPF? 8 Sep 2010 (Ask HJ)
  Does the above vehicle have a diesel particulate filter? No mention was made about this when my wife and I ordered one last month from our local Honda...
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  Does the DPF warning light in my pickup truck mean it's regenerating? 26 Jun 2017 (Ask HJ)
  My daughter has bought a three year old Isuzu pickup truck with only 12,000 miles on the clock. The DPF light keeps coming on, the main dealer says that...
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  Which cars have known DPF problems? 18 May 2013 (Ask HJ)
  With advancing age I want to drive something smaller and more economical (presently I have a Mazda 6 2.0i) and am very interested in the Hyundai and Honda...
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  Citroen C3 Pluriel - which is the best engine? 19 Jun 2016 (Ask HJ)
  I am looking to buy a late Pluriel. Could you tell me which is the best engine and is the diesel a modern one with a DPF or is at an older style?
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  Can you recommend a medium car for short trips which will avoid DPF problems? 2 Nov 2013 (Ask HJ)
  Could you recommend a reliable small to medium car or SUV for an average of 10,000 miles per year, primarily consisting of short journeys for a couple...
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  Suzuki Swift - should I extend my warranty? 24 May 2013 (Ask HJ)
  My Suzuki Swift diesel has come to end of warranty and now offered extended warranty. Would this be worth it and what should I look for, and would...
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  Jaguar XF - does it have a diesel particulate filter? 6 Nov 2012 (Ask HJ)
  Does the Jaguar XF have a DPF and if yes, are you aware of any problems? We have had problems with our current Vauxhall Insignia and don't want a repeat.
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  Black smoke from S Class 18 Jul 2011 (Ask HJ)
  Last week you wrote about DPF clogging to contaminate lubricating oil. My computer says I have a reduced oil level but the dip stick confirms correct amount....
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  Is there a DPF in my Citroen C2? 24 Aug 2010 (Ask HJ)
  I have read the FAQ about DPF problems, but are they fitted to every diesel car including my 2002 Citroen C2?
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  Will short journeys in a diesel car cause issues? 3 Aug 2021 (Ask HJ)
  I have a 2014 Mercedes SLK diesel roadster. Will making multiple short journeys of 5-10 miles cause a problem with the exhaust system? If so, would some...
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  How do I get my DPF to regenerate? 19 Jan 2024 (Ask HJ)
  I own a 2017 BMW 640d Coupe. It easily reaches 70 mph at 1500rpm in auto mode. I think you advise drivers to maintain 2000rpm for 15 miles or so on a dual...
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  Should diesel particulate filter (DPF) failures be covered by a manufacturer warranty? 1 Nov 2021 (Ask HJ)
  Is the MG seven year warranty any good? The catalytic converter has failed (or the particulate filter) after only three years. Is that acceptable to be...