Ask Honest John

Most recently answered electrical faults questions
I have a Corsa SXI. For the last six weeks it has had a intermittent problem - sometimes it would start and sometimes it wouldn't. My mechanic has spent hours trying to find out what is causing it. Fuel...
My 2001 BMW 530d Sport is suffering from a rough idle/spluttering problem. My car has been in and out of a diesel specialist for the past 18 months and I am at my wit's end. The following has been changed:...
I have a Volkswagen Touran which is now six years old. We have owned it from new and it has only done approx 30,000 miles. About six months ago, the handle that you pull the boot open from the outside...
I have a Vauxhall Zafira on a 55 plate and I can only open the drivers door with the key, while the rear hatch won't even lock. I checked all the fuses and one had blown, so I changed it, but it still...
I have a 2004 A3 3.2 Quattro which has developed a fault which is really bugging me. My rear light cluster lens was slightly cracked and had let in some water and so I removed the cluster to seal the lens...
Any idea how frequent the ABS/ESP module fault is which affects the Volkswagen Golf V, Mazda 3, Skoda Octavia and BMW 1 Series? Is it a problem that all cars fitted with this unit will definitely suffer...
I crashed my Nissan Terrano 2.7TD 1999 model and now it won't start. It's got fuel at the filter, got good battery power, it's not immobilised and I can't find a fuel cut-off switch. It just won't start....
I have a BMW N-reg and the mileage display partly works, by which I mean you get half the display. If you hit the dash it works for a while, but has been getting worse. It is an electronic display. Any...
I bought a '54 Volkswagen Touran 2.0TDi sport a month ago. I paid a high price because the car is as clean as a whistle inside and out and has done 100,000 miles. It has a full Volkswagen service history....
I am thinking of buying a Mercedes-Benz - a 1998 C240 has caught my eye. I know this site says that the ECU can go after 12 years. Is this only with the C200 or all C-Class models? Or should I go for a...