Practical guides to help you understand MOTs, servicing, repairs and garage costs.
When your test is due, what the tester checks, and what to do about a fail.
A pre-MOT check is a garage inspection done before your real MOT to catch the faults most likely to fail it. It is not always worth paying for. Here is what it covers, what it costs, and the retest rule that decides whether it pays.
A free government service lets you look up any vehicle’s past MOT results, recorded mileage and advisories, and see when the next test is due. Here is how to use it.
Driving without a valid MOT risks a £1,000 fine, and there is no grace period. Here are the only two exceptions, and whether you can drive away from a fail. Plus what still counts as roadworthy.
An MOT advisory flags a part that is starting to wear but is not yet bad enough to fail. Here is what it means, whether you must act, and how it differs from a fail.
More than one in four cars fails its MOT first time. DVSA figures show which faults cause it, and which ones stop you driving away.
The MOT test itself usually takes 45 to 60 minutes, but a garage may keep your car longer if it is busy or if repairs are needed. Here is what to expect and how to get it done quicker.
An MOT costs at most £54.85 for a car, a maximum set by the DVSA, and there is no VAT on the test fee. Many garages charge £30 to £45. Here is what the fee covers, the maximum for every vehicle class, when a retest is free and how to pay less.
A handful of free checks the night before, on lights, tyres, wipers and more, can catch the simple faults that account for a large share of MOT failures.
If your MOT lapses it is illegal to drive or even park on the road, with a fine of up to £1,000 and no grace period. Here is where you stand on tax and insurance. Plus SORN, how to get legal again, and how to renew early without losing your date.
New cars are exempt for three years, and many vehicles over 40 years old can be too. Here is who qualifies and how the historic vehicle declaration works. Exempt never means you can ignore the car.
Booking an MOT is quick once you know your due date, and testing early loses you no days. Here is how to find that date and choose a DVSA-approved centre. Plus how to compare local garages on price and reviews.
Electric cars need an annual MOT once they turn three, just like petrol and diesel models. Here is what the tester checks, and what changes for an EV.
If your car fails its MOT, you may not need to pay for a full second test. A partial retest can be free, or a reduced fee, if the car is repaired quickly. Here is how it works and how to avoid paying twice.
In almost all cases a car needs a valid MOT before you can tax it, because DVLA checks the record electronically. Here is how they are linked, and the exceptions. Plus the Direct Debit trap, what a lapse costs, and the order to do things in.
An MOT checks the parts of your car that affect safety and emissions, from lights and brakes to tyres, steering and the exhaust. Here is what the tester looks at, what the test does not cover, and roughly how long it takes.
If you believe your car was failed wrongly, you can appeal to the DVSA. The key is to act within the time limit and not repair the car before it is re-inspected. Here is how the appeal process works, step by step.
What is included at each service level, how often, and what it should cost.
A full service history means a car has been serviced at every interval its maker specifies, with no gaps, and can prove it. Here is what counts as proof, what it is worth, how to check one before you buy, and what to do if yours has been lost.
Booking both at once usually costs less than two separate visits, but not for the reason most people assume. The MOT fee is capped by law at £54.85 either way. So every penny of a bundle discount has to come off the service, and that is the half with no legal definition at all.
An interim service usually takes about an hour, a full service around three hours and a major service most of a working day. The bigger question is how long the car is away from you, which is often longer than the work itself.
Servicing at an independent garage does not automatically void your manufacturer warranty. Here is how the two compare on price, parts, warranty and expertise. Independents usually charge less than a franchised dealer for the same work.
Most drivers need a full service once a year, an interim only above 12,000 miles. Neither term is officially defined, so compare checklists, not labels.
A full service checks your car’s key systems and changes the essential fluids and filters. Here is what one covers and how it differs from an interim service. Plus whether it is worth the money.
How often a car needs servicing depends on your handbook, your mileage and the type of service, not on a single rule of thumb. Here is what the intervals really mean, and how skipping a service can cost you more later.
An MOT is a legal annual test capped at £54.85 that checks minimum standards. A service is optional maintenance that replaces fluids and filters. The MOT never checks the engine internals, clutch, gearbox or cambelt, which is why a pass is not a clean bill of health.
Most cars need a cambelt every 40,000 to 100,000 miles or every 4 to 10 years. The years limit is the one that catches drivers out.
An electric car has no oil, no cambelt and no spark plugs, so a service costs less. The brakes, tyres and 12 volt battery are where the attention goes instead. Here is what an EV service covers, how often it is due and how to check the garage is qualified.
What common repairs and services really cost in the UK, and what makes a quote fair.
A timing chain replacement in the UK usually costs £750 to £1,000. It runs past £2,000 when the chain sits at the back of the engine.
A CV joint replacement costs £250 to £500 fitted per side in the UK, and £250 to £900 across all cars. Catch the split boot first and it is £50 to £140. Your MOT grades that boot twice, so it tells you in writing which price you are heading for.
A water pump replacement in the UK usually costs £250 to £500 fitted on its own. It rises to £500 to £900 when the pump sits behind the cambelt. The RAC puts the average water pump repair at around £273, and almost all of the bill is labour rather than the part.
A spark plug replacement in the UK usually costs £100 to £250 for a full set fitted. The RAC puts the average at around £153. Most of the bill is labour rather than parts, and diesel cars do not have spark plugs at all.
An oil and filter change averages £229 at a mobile mechanic and less at a local garage. Here is the price by make, and when a service is better value. Plus the oil spec that protects a particulate filter, and why a leak fails the MOT.
A starter motor replacement usually costs £180 to £350 fitted on a mainstream car, and £400 to £900 on a premium one. Here is why UK prices vary so widely. Plus the checks that tell you whether the starter motor is even the part that has failed.
A standard car battery fitted usually costs £70 to £130, and the EFB or AGM battery a stop-start car needs costs £120 to £250. Fitting is often included. Here is what moves the price, and how to avoid paying over the odds.
A new car tyre in the UK typically costs £40 to £70 budget, £70 to £120 mid range and £120 upwards for premium, fitted. The price is the easy part. Worn tread is graded Dangerous at the MOT, not merely a fail, which is why tyres cause more dangerous defects than every other category combined.
A wheel bearing replacement in the UK usually costs £150 to £250 per wheel fitted. The RAC quotes around £200 on a Vauxhall up to £320 on a Volvo. Most of that is labour, and unlike a cambelt, a worn bearing is checked at the MOT and can fail it outright.
A cambelt change in the UK usually costs between £300 and £600 for the belt alone, and £500 to £900 once the water pump goes on with it. The RAC puts the average at around £430. Almost all of that is labour, because the belt is buried behind the front of the engine.
A gearbox replacement in the UK typically costs between £500 and £2,800 fitted, and the RAC puts a new gearbox at £500 to £1,500 before labour. A repair is often a fraction of that, so the first job is finding out which one you actually need.
A head gasket replacement in the UK usually lands somewhere between £450 and £2,000, with the RAC putting the average at around £721. Almost all of that is labour, which is why the same job varies so much between cars and between garages.
A full service is about £170 to £210 on a small car and £210 to £300 on a medium one, per the RAC. An interim service is a third to half of that.
Front brake pads average around £128 fitted in the UK and rears around £121, with discs adding £150 to £250 per axle. What moves the price, and what waiting costs. Plus drums, callipers and how to read a quote.
What a clutch does, the signs it is wearing out, and realistic UK prices for a replacement, including why it is such a labour-heavy job.
What an air con re-gas actually does, the signs your system needs one, and realistic UK price ranges for both older and newer refrigerant types.
What wheel alignment (tracking) is, the signs your car needs it, the difference between two-wheel and four-wheel alignment, and how it saves you money on tyres.
What a diesel particulate filter does, why it blocks up, and the very different costs of a forced regeneration, a professional clean and a full replacement.
What a new exhaust really costs in the UK, from a single back box to a full system, and why the price swings so much from car to car.
Alternator replacement runs £250 to £800 in the UK, averaging £513 fitted. What moves the price by make and by town, and why a fresh MOT pass proves nothing. Plus how to tell the alternator from the battery.
What suspension repairs cost in the UK, from shock absorbers to wishbones and bushes, plus the knocks and wear that warn you something is worn out.
A plain guide to UK catalytic converter replacement prices, covering what the part does and the signs that it is failing. It also explains OEM versus aftermarket parts, and why theft is a real risk.
A plain guide to UK turbocharger replacement prices, and the signs that a turbo is failing. It covers reconditioned versus new, labour, and the causes worth knowing.
A car radiator replacement usually costs somewhere between £180 and £800 fitted, with most everyday cars in the middle. Here are the signs it is failing. Plus the split between part and labour, and what a fair written quote looks like.
The checks and small jobs that keep a car healthy between visits.
Where to find your car’s own figures, and why the placard shows two. Plus what a British winter quietly takes out of them.
Check it cold, never hot. Here is how to read the min and max marks, what to top up with, and why a coolant leak still sails through its MOT.
No, an independent service does not void a manufacturer warranty. CMA guidance says a warranty tied to dealer-only servicing likely breaks competition law. Follow the schedule, use matching-quality parts and keep every receipt.
Ask a garage six things before you book, not after. A quote and an estimate are legally different, and a garage can keep your car while a bill is disputed. Here are the questions, the words that matter, and what your rights actually are if it goes wrong.
Most garages are fair, and the few that are not rely on you having nothing to compare against. Here are the warning signs and the benchmark prices.
A mobile mechanic suits jobs that do not need the car lifted, and only a garage can do the MOT. Paid repairs on a public road are an offence, so parking decides it. Here is how the two compare on cost, convenience and what each does best.
If a garage did the job badly or overcharged you, the Consumer Rights Act 2015 gives you the right to have it put right at their cost. Here is the order to do things in, from the first email to the small claims court, and what each step costs.
How to check tyre tread at home with the 20p test, which grooves count towards the 1.6mm legal limit, and how the MOT grades every tyre defect.
Dashboard warning lights are colour coded: red means stop, amber means get it checked, and green or blue is information only. Here is what each common symbol is asking you to do, which nine lights fail an MOT, and what the usual repairs cost.
The engine management light warns that the car has detected a fault. A steady amber light means book a check soon, while a flashing light means stop and get help. Here is what the light means, how long you can safely drive, the common causes and fault codes, what each repair tends to cost, and why an engine management light will fail an MOT.
Brakes rarely fail without warning, and squealing, grinding, vibration or a soft pedal are all signs the system needs attention. Here is how to read each warning sign, what it usually means, and why you should get brakes checked promptly.
A trustworthy garage saves you money and hassle for years, and the signs of a good one are easy to spot once you know them. This guide covers reviews, written quotes, DVSA-approved MOT centres, trade body membership and warranty on work.
The usual causes of overheating, what to do the moment the gauge climbs, and why carrying on driving can wreck the engine.
A diagnostic check reads the fault codes your car has stored. Here is what that fee buys, what a code can and cannot prove, and what one costs in the UK.
From a flat battery to a fuel or immobiliser fault, here is how to tell the common no start causes apart and when it needs a garage.
Batteries are the number one cause of UK breakdowns. Here are the warning signs, what each points at, and how to tell a dying battery from a failing alternator. Plus what a garage test actually measures and when age alone is reason enough to replace.
A simple run through of the checks that keep you moving through the cold months, from battery and tyres to antifreeze, screen wash and a boot kit.
A step by step guide to reading your dipstick correctly, understanding what the oil is telling you, and topping up without overfilling.
AdBlue is a fluid that cuts harmful emissions on many modern diesels. Ignore the warning light and your car may refuse to restart. Here is how it works.
The correct order for connecting jump leads, the safety points that matter most, and how to tell when a jump means the battery needs replacing.
A shaking or vibrating steering wheel usually points to your wheels, tyres or brakes. Here is what each pattern of vibration means and when to get it checked.
A car that feels sluggish or drops into a reduced power mode is usually telling you something is restricting its air, fuel or exhaust flow. Here are the common causes and why a diagnostic read is the sensible first step.
Brake fluid is easy to check yourself in a couple of minutes, and the level and colour tell you a lot about your brakes. Here is how to find the reservoir, read the level, and know when it needs a garage.
A burning smell is your car flagging heat where there should not be any. What it smells of narrows the cause down fast, and some of them mean stop now. Here is how to tell them apart and how urgent each one is.
Air conditioning that blows warm is a common complaint, and the cause is often simple. Here are the usual reasons, from a re-gas to a leak or a blocked filter. Plus when it needs a garage.
Most electric car batteries are built to outlast the rest of the car, and they fade slowly rather than failing all at once. Here is how long an EV battery typically lasts, what the warranty covers, what wears it out, and why a full replacement is rare.
A car heater that blows cold air is usually a sign that warm coolant is not reaching the heater, or that a control has failed. Here are the common causes, the simple checks you can safely make yourself, and when the problem needs a garage.
A few minutes of checks before a long journey can save you a breakdown on the hard shoulder. Here is a checklist covering tyres, fluids, lights, brakes and wipers. Plus the emergency kit worth keeping in the boot.
Working out what a noise, a smell or a warning light is telling you.
An ABS light means the anti-lock system has switched itself off. Your ordinary brakes still work, but the car will fail its MOT. Here is what causes it, what each repair costs, and when to stop driving.
A dark patch on the driveway is not always oil. Here is how to read the colour, what each repair really costs, and the leak size that fails an MOT. Where the drip lands tells you which seal has gone.
White exhaust smoke is coolant, blue is oil, black is unburnt fuel. Here is how to tell steam from a head gasket, what each costs, and what the MOT says. Plus when to stop driving, and exactly what to tell the garage.
A knock over bumps is worn suspension, a click on full lock is a driveshaft joint. A knock that rises and falls with the revs means stop driving. Here is the free test that tells them apart in thirty seconds, and which knocks are already an MOT failure.
Advice for garage owners on winning and keeping local customers.
A garage lead costs anywhere from about £10 to £40, but the headline price is the least useful number in the deal. Here is what the main UK channels charge. Work out your own break-even too, because cost per won job is the figure that really decides it.
Winning more local work does not need a big budget, it needs the free things done properly. Your Google profile, reviews, a claimed listing, and a fast reply. Here is the order that works.