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Technical Questions Answered

Honest John and other experts answer the technical questions about your car

My Mazda CX-5 heating matrix has stopped working, which is quite chilly in winter. I've seen various messages that Mazda are aware of this issue, I was...
Driving down a country lane I hit a deep pothole that was covered by a puddle. I was probably going around 25-30mph. My front wheel on the passenger's...
My 2005 Ford (petrol engine) has started burning quite a lot of oil and I can't find an external oil leak. The car has done 100,000 miles and has been...
Yesterday I discovered water ingress in the front and back near side footwells of my Volkswagen Golf. Recently we have been having problems with condensation...
The heater in my 2002 Vauxhall Vectra has stopped working. Also the fan only works on the highest setting. What parts do I need and is it easy to fix it...
My Ford Mondeo's battery is discharging when it's shut down and stationery. It is a new battery, but the car is nine years old, with 53,000 miles on the...
On odd occasions my 2013 BMW X1 suffers the judders as I accelerate through the gears. As if it doesn't know whether to go on - but you can easily just...
The airbag warning light, along with an audible alarm, is constantly on in my 2007 Citroen C4 Picasso. How do I fix this?
We purchased (privately) a 2003 BMW 3-Series 1.8-litre petrol automatic in late 2016, with 49,000 recorded miles. It has a stamped BMW Service Record,...
My Peugeot Partner Tepee recently developed a knocking noise from underneath the vehicle when I go over bumps, rough road etc. I've had it looked at by...
Recently, I had the water pump changed in my 2005 SEAT Ibiza. It was always at 90 on my temp gauge, but since the pump change it keeps overheating. It's...
I saw your comments about the Volkswagen DSG gearbox in the Daily Telegraph. What is the problem with the DSG? I have had the Tiptronic in an Audi A4 quattro...
My Ford Transit Custom isn't blowing cold air. The temp gauge also shows no temperature.
I have a problem with the heater on my Triumph Spitfire. When the heater is turned to 'hot', it starts to produce nice warm air into the cabin once the...
The oil light on my 2010 Skoda Octavia comes on, even though I've topped it up with oil. What could the issue be?
I purchased a 2009 Skoda Yeti in June 2017. There have been no apparent issues with it until the last month or so, when the passenger footwell fills with...
I took my 2006 Ford Fiesta ST to a local garage as the heater only blows cold air. They've told me the expansion tank has split. They have the part on...
I have a 2007 Peugeot 207 1.6 HDI, with 83,000 clocked miles. Basically, the longer the car sits unused, the more blue smoke it puts out when it starts...
I was driving my 2005 Volkswagen Sharan today and the clutch pedal went flat to the floor, as if it lost pressure. It returned to half way up since then,...
My 2010 Skoda Octavia 1.6 TDI has had numerous faults after the emissions fix. Erg valve has been replaced, injectors were replaced. The light has come...
I have a problem getting all the air out of the cooling system after a thermostat change. What do you recommend?
The battery in my Peugeot 308CC was draining frequently, especially in cold weather. I replaced the battery seven months ago but it still goes flat after...
I have a 2009 Honda CR-V CDT-i with 60,000 miles on the clock. Under heavy acceleration there is black smoke out the exhaust - a fair amount. We have done...
I recently hit a bird, which necessitated a new windscreen for my Audi SQ5 as a mater of urgency. I ordered a replacement to be fitted by Auto Windscreens...
Should the fan run continually when the engine is running or only when coolant reaches a certain temperature?

Technical Questions: Engines

I have just bought a 9 month old third generation Honda Jazz SE. The manual recommends the use of 95RON super unleaded petrol. Will I damage the engine...
Is the engine on a Daewoo Kalos 1.2-litre 2003 8-valve after timing belt failure?
What do you think of BMW 316i? Bearing in mind that I'm not the kind of driver that tends to push the car towards its limit, I'm concerned that the engine...

Technical Questions: Gearboxes

Do you have a list of good auto gearboxes?
I own a Volkswagen Golf SV with a DSG six-speed gearbox. I have seen your reports that there have been many problems with these boxes. My car is coming...
I'm looking to buy a new or nearly new small vehicle but need an automatic due to disability to left hand. I've read reviews and it appears that the Hyundai...

Technical Questions: DPFs

I read in a recent 4x4 review that the engine oil is quickly contaminated by the DPF. Is this the case on all diesel engines with a DPF, and can it affect...
I'm interested in understanding why a driver cannot request their car to kick off a regeneration manually, for example, when they get on the motorway for...
What's the best way to clean soot from a DPF?

Technical Questions: DMFs

I had my clutch and DMF changed at Mr Clutch after the original one failed after 100,000 miles. The replacement lasted less than 10,000 miles, so Mr Clutch...
Our two year old Ford Transit Connect has just had to have a new dual mass fly wheel in it. Ford refused to change it under warranty because they said...
The clutch and flywheel on my Ford Focus 1.0 Ecoboost (new since September 2015) were burnt out and replaced in November 2016. The dealer and Ford wouldn't...

Technical Questions: Suspension

The front suspension on my 2014 Toyota Auris passenger side is shot. The driver's side is fine, but I obviously have to replace both. Are speed bumps causing...
I'm an Antiques dealer and therefore need a van with a soft ride. Which vans have the softest suspension?
I have an Audi A1 1.6 TDI Sport which is well built, lively and economical. The only downside is the firm suspension which is not suited to the poor quality...

Technical Questions: Bodywork

I bought a six month old Porsche 911 (991) model Carrera from a Porsche main dealer in September 2015. Mechanically the car is perfect, but there is an...
I bought a new Ford Transit Custom M-Sport from a Ford main dealer in March 2016. In January 2017, the paintwork bubbled in the cold weather. Ford put...
My wife reversed her Vauxhall Meriva into a stationary BMW in a supermarket car park in March 2017. Very minor rub marks were left on both cars (I polished...
 

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The Representative APR is 13.2% (fixed) so if you borrow £7,500 over 4 years at a rate of 13.2% p.a (fixed) you will repay £199.21 per month and repay £9562.20 in total.