Should I change my car?

I have a Sept 2007 Mazda 6 2.0 diesel, which has been totally reliable and trouble free for 3.5 years. I have read your advice that diesels start costing money in years 4-6. What is likely to need doing...

Gaseous exchange

Recently the emissions warning light came on in my 2005/55 Audi A4 TDI which has done 55,000 miles and always been serviced at my local Audi dealer. Upon inspection they said there is a leaking EGR valve...

Can you explain how a diesel particulate filter works?

Can you give us any information on where I can find a proper explanation of the function and potential limitations of a diesel particulate filter?

Can you recommend an economical car for my 60-mile commute?

I currently own a 2007 Aygo+, with three doors. Following a job change last year I am now commuting over 60 miles a day on the A5 and A38, both dual carriageways, between Tamworth and Derby. I am spending...

Running an Aygo diesel

Engine management light comes on and goes off with no loss of power. I have had the EGR valve changed, this has not stopped the problem; when having a diagnosis, it shows exhaust gases.

How are DPFs damaged by repeated short journeys? Our 2000 BMW 320d has done 180,000 miles without fault.

Regarding latest EU emission regulations for diesel engines, could you please give us more information on the subject of the particulate filters being adversely affected by repeated short journeys? I have...

Should I use a diesel or petrol car as a driving school vehicle?

I am a driving instructor and I do about 700 to 800 miles per week. My question is, would a diesel car be better for me? At first glance at my weekly mileage the answer would seem obvious, but here are...

Why don't salesroom staff do more to inform customers about the need to regenerate diesel DPFs?

I’m no great fan of the EU, but I think your reply to GR of Warrington blaming them for the clogging of particulate filters was a bit off the mark. Yes, the EU called for better street-level air quality...

Renault Kangoo

Brief story about Renault Kangoo 1.5 dci. Glow plug light comes on when driving, power reduces, sometimes slightly and then it gets worse - until 5mph is about all it will do! Not good for busy roads or...

Vauxhall Zafira

my Zafira has been playing up for a while now when its low on fuel in looses power only on a left turn. However it's been in 5 garages now and they haven't got a clue. It's a 1.6 fuel injected Zafira 1999...