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Technical Questions Answered

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

I've got a Mercedes E320 CDi and I've started to get warnings on my dashboard display concerning the left and right hand rear number plate lights and third...
I'm having battery charge problems with my Rover 75 CDTi. I get dashboard warnings that all go away when you charge the battery, but return twenty miles...
I've just bought a Renault Megane 1.6 petrol. When I start the engine, it starts but loses power at first. It needs a bit of accelerating to keep the engine...
I have an unusual problem with my 1981 Toyota Hiace. In the six years that I've owned the car it has started burning sump oil and revving out of control...
My Renault Trafic 1.9 DCi glow plug light comes on and goes into limp mode. It also wont rev over 2000 and emits lots of white smoke from the exhaust....
I have a problem with the clutch pedal on my 2004 Ford Focus 1.8 TDCi staying on the floor occasionally, causing no disengagement of the gears. I lift...
I have a 2011 Citroen DS4, purchased two years ago. Since January, the engine light keeps coming on and the car will go into limp mode. I had the emissions...
My 1996 Ford Mondeo been standing for three years. What is the best way to approach starting it again? I've fitted a new battery but it didn't start. The...
I have a 2006 BMW X3 2.0d sport, bought through finance. I've had it since 2014, but since the DPF issue I seldom use it. In the first quarter of 2015,...
I have a four year old Mercedes-Benz SLK with 19,700 miles on the clock. I've owned it for a year and it has been covered by a warranty, which has now...
I have a 2015 Renault Clio with approx 18 months warranty remaining. I've had persistent trouble with the tyre sensors malfunctioning and have had three...
When I first start my 2001 Ford Mondeo in the morning it is great, however when the engine warms up I start having problems. It doesn't matter what gear...
Does a creamy substance on the oil cap indicate head gasket problems?
My Ford Focus Mk1 dashboard lights keep flashing like a Christmas tree while I'm driving.
I have a 2003 diesel Renault Clio 1.9. The engine turns over, but there is no ignition. There is a strange whirring noise coming from the engine bay. So...
Any ideas on how water is getting into the boot of a fairly new Citroen C1?
When driving, the speedometer in my Citroen C3 Picasso is showing a different speed to that which I'm actually driving it. How do I fix it?
I'm having some issues with my petrol Renault Clio Rush 1.2 8V. I had the water coolant tank and stop light show on my dashboard because the engine was...
How do you depressurise fuel, prior to replacing injectors, on a Peugeot 406?
My Ford Focus 1.6 TDCi runs fine for 35 - 40 miles, then cuts out as if the ignition was turned off. When I stop and turn off the ignition and then restart...
What does the engine warning light on my Volvo V60 mean?
I bought a brand new diesel Volkswagen Golf in January. There was a series of minor problems at first; tyres at the wrong pressure, pulling left, a burning...
I bought a van on finance and have now found out that it's been clocked. The mechanic just found multiple issues and it needs new gearbox. I bought over...
I gradually keep losing clutch fluid from my 1996 Ford Fiesta. It seems to be coming from underneath the engine, I have to top up the fluid once or twice...
My five year old Mercedes-Benz E550 has done 17,000 miles and has had the brake pads replaced and now the rotors. Apparently the reason for the rotor failure...

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

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...
I like the look of the new model Renault Scenic and am considering changing my lovely BMW E89 Z4 M Sport auto for one. The Dynamique S Nav appears to be...

Technical Questions: DPFs

The DPF on my 2009 Jaguar XF was professionally cleaned after going from amber to red. The car had done high mileage (104,000), so I was kind of expecting...
I have a 2014 Porsche Macan 3.0-litre diesel, bought new. It recorded 42mpg or better on a long run and 39mpg average on short urban runs. Porsche wrote...
My Volkswagen dealer has advised against carrying out the emissions software update on my Golf Plus because they say there is a fault in the exhaust gas...

Technical Questions: DMFs

We have decided to purchase a year old Volvo V40. It's a second car that would have be mostly short journeys and twice weekly 40 mile commutes, doing about...
I took out an extra 3 year warranty, paid in full, when I purchased a Ford C-Max. I have since had an intermittent fault of the clutch pedal not fully...
I'm looking at buying a 2008 Ford S-Max 2.0 TDCi, 133,000 miles on the clock. It's priced at £2650 and I'm looking at it this week. What things should...

Technical Questions: Suspension

I'm looking to purchase a new BMW 440i. Please can you add some clarity to the wildly opposing views on the benefits, or not, of Adaptive M Sport suspension...
What type of front suspension is fitted to the MG RV8?
I have read that Citroen has patented a new suspension system that will be introduced this year. I am thinking of changing my C5 Tourer which has the hydro-pneumatic...

Technical Questions: Bodywork

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...
I've been passed my test just under one year and I've had my new car for three weeks. Last week, I was stationary when someone else hit me from behind....
My husband bumped my Land Rover into a bin. The side door is dented and has a large scrape on. What would be cheaper, to claim on the insurance (I have...
 

Ask Honest John

Value my car

Amount to borrow
Sorry. The minimum loan amount is £1000
To pay back over

My credit score

Best available rate 9.20%

Total repayment £9,304.93

Total cost of credit £1,804.93

£155.08

60 monthly payments

Apply now

Representative example

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.

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