Ask Honest John

Most recently answered diesel particulate filter questions
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 the DPF warning light was on most of the way there...
I currently have a Ford Focus 1.6TDCi (2009). I am fed up with the constant DPF issues, so firstly is it worth replacing the DPF (I don't think removal is a legal option). My garage has regenerated the...
I own a 2009 MINI Cooper D, which is suffering a bout of DPF issues. Within a few months of owning the car, the DPF light came on (regularly) and BMW performed a forced regeneration. Two months later,...
I have a BMW 1 series 118d (2009) and the DPF warning light has come on. It pops up after every four or so miles per journey. I haven't noticed any difference in my cars performance though. I have around...
I bought my Ford Focus in 2008 when it was approx six months old and had 6000 miles on it. I've done 77,000 miles on it now (six years later) and have had to replace the DPF three times: May 2012, Jul...
I have done 90,000 trouble free miles over four years in a Mazda 6 163 hp diesel. I love the way it drives, especially the way the engine responds. I am now retiring and am looking to buy a new Mazda 3...
I have £6000 to spend on a used estate car. It must be large enough for dogs, grand kids and holiday luggage. What would you recommend?
I bought a new Mazda a few years ago but it developed DPF problems as I only did about 7k miles annually and mainly short journeys. I want to buy diesel and do roughly similar mileage but I find most of...
I purchased a 2006 VW Golf from a second hand dealer approximately 1 month ago. Recently the engine management and particulate filter warning lights came on along with a fault on the seatbelt warning...
I'd like to be 100% sure whether my Kia has a DPF or not. The details are: Kia Ceed Hatchback (07-12) 1.6 CRDi LS (113bhp) 5d Date of Registration: 17 Aug 2007 Fuel Type: Diesel