An interim service costs £120–£200 at a garage. The parts in it — oil, an oil filter, maybe an air filter — cost perhaps £35. Everything else is a mechanic’s time and a ramp. That gap is the entire argument for doing simple maintenance at home.
It is also why the average British car being over ten years old matters. Older cars need more small attention and are worth less, so the ratio of bill to value gets worse every year. Doing the easy 60% yourself is what keeps an ageing car cheap rather than a liability.
Never work under a car supported only by a jack. Use axle stands on firm level ground, chock the wheels, and leave the jack in place as a backstop. If a job requires the car to be raised and you are not confident, that is the moment to book the garage — a saved £60 is not worth a crushed chest.
The starter toolkit
Almost everything below is possible with: a socket set with a ratchet and extension, a set of combination spanners, a torque wrench, a trolley jack and two axle stands, an oil drain pan, a funnel, disposable gloves, a torch, and a set of plastic trim tools. That is a one-off outlay of roughly £120–£200 and it pays for itself in the first two or three jobs.
The one thing you should not improvise is figures: oil grade and capacity, tyre pressures, wheel-bolt torque and service intervals are model-specific. They live in the handbook — see where to find your owner’s manual if yours went missing years ago.
The eight jobs
| Job | Difficulty | Typical parts cost | Typical garage price |
|---|---|---|---|
| Wiper blades | Very easy | £15–£30 | £35–£60 |
| Bulbs | Easy to fiddly | £5–£20 | £25–£80 |
| Air filter | Easy | £10–£25 | £40–£70 |
| Cabin (pollen) filter | Easy | £8–£20 | £40–£80 |
| Oil and oil filter | Moderate | £35–£60 | £120–£200 |
| Battery | Easy | £60–£130 | £110–£220 |
| Front brake pads | Moderate | £30–£60 | £120–£250 |
| Tyre rotation & pressures | Easy | £0 | £25–£50 |
1. Wiper blades
Ten minutes, no tools, and an MOT item. Smearing, chattering or a torn rubber edge fails the test on driver’s view of the road. Buy the correct lengths — they are often different front-left and front-right — and lift the arm carefully so it does not spring back onto the glass.
2. Bulbs
Lighting causes more MOT failures than any other single category, and a bulb is a few pounds. Some cars give you a hatch behind the headlight; some require the whole unit or the wheel-arch liner to come out, which is where a workshop guide earns its keep. Never touch halogen glass with bare fingers — skin oil makes it fail early. Replace bulbs in pairs so the beams match.
3. Air filter
Usually a plastic airbox held by clips or four screws. Lift the lid, note which way round the old filter sits, drop the new one in. A clogged filter costs fuel economy, and this is the cheapest “service item” in the car.
4. Cabin filter
Almost always behind the glovebox or under the scuttle panel. If your windows mist up stubbornly or the heater smells musty, this is usually why. Trim tools help; brute force breaks clips.
5. Oil and oil filter
The classic first proper job. Warm the engine briefly so the oil flows, raise and support the car, drain into a pan, replace the sump plug washer, change the filter, refill through the funnel and check the level with the dipstick. Two rules matter more than technique: use exactly the oil specification the manufacturer lists, and torque the sump plug to the stated figure rather than as tight as you can manage. Take the old oil to a household waste recycling centre — most take it free, and pouring it away is an offence.
6. Battery
Negative terminal off first, positive off second, then the clamp. Reverse to fit. Note that many cars from the last decade need the new battery registered to the charging system with a diagnostic tool, and cars with stop-start need the correct AGM or EFB type — fitting a cheap standard battery to a stop-start car buys you a short and disappointing life.
7. Front brake pads
The most valuable job on the list and the one demanding the most care. Pads themselves are cheap; the labour is not. It needs the caliper piston wound or pushed back, correct torque on the caliper bolts, and a proper bedding-in drive afterwards. If the discs are lipped, scored or below minimum thickness they need replacing too. Brakes are the one system where “probably fine” is not an acceptable standard — if anything looks unfamiliar, stop and hand it to a mechanic.
8. Tyre pressures and rotation
Free, monthly, and it pays back in fuel and tyre life. Check when cold, use the sticker inside the door frame, and add the higher “laden” pressure when the car is loaded for a holiday. While you are down there, check tread depth with a 20p coin: if the outer band of the coin is visible when inserted in the main grooves, the tread is close to or below the 1.6 mm legal limit.
If a warning lamp is lit, find out what it is first — changing the oil will not clear an ABS fault, and some lamps mean the car should not be driven at all. Every dashboard warning light, drawn and explained.
Four jobs to leave to a garage
- Cam belts. Get it wrong by one tooth and the engine destroys itself. Specialist tools, specialist knowledge.
- Clutches and gearboxes. Heavy, awkward, and needing equipment you will not have.
- Air conditioning. Refrigerant is regulated; it needs certified recovery equipment.
- Anything hybrid or electric with orange cabling. High-voltage systems can kill. That work is for trained technicians, full stop.
DIY servicing only hurts resale value if you cannot prove it happened. Keep receipts for oil, filters and parts, and write the date and mileage against each job in a service book or a notebook in the glovebox. A folder of receipts and a consistent mileage record convinces a buyer far more than an empty stamped book.
Sources: MOT failure categories — MOT Checkup analysis of DVSA data; average vehicle age — RAC Foundation. Prices are typical UK ranges, September 2026.