You’ve booked the ferry, packed the car to the roof and told yourself the BMW will be fine. And it probably will be. But “probably fine” on a 1,000+ mile round trip through the United Kingdom is not the same as “probably fine” on the school run.

Long drives are harder on a car than short ones: sustained speed, sustained heat, sustained load on everything that was quietly getting by on local roads. This isn’t a scare story. It’s just worth spending half an hour the week before you go having a proper look, rather than finding out on an autoroute at 10 pm that something wasn’t quite right.

Here’s what to check. Most of it takes five minutes. None of it requires special tools.

Tyres

Tread and pressures

Start here. The legal minimum is 1.6mm, but on a motorway in the rain, 1.6mm is not somewhere you want to be. If you’re heading abroad for a fortnight, aim for at least 3mm on all four. Anything below that and you’ll want to think about replacing before you go rather than when you get back.

Pressures matter more than most people realise, and the pressure you run day-to-day probably isn’t right for a loaded car. Check the sticker on your driver’s door sill. There’ll be two figures: one for normal load, one for full load. If you’re travelling with four up and a boot full of luggage, use the full load figure. Check cold, before you’ve driven anywhere. And don’t forget, BMWs have a tyre pressure reset in the iDrive menu. It doesn’t inflate your tyres; it just sets a new baseline. If your pressures are wrong, resetting it doesn’t fix anything.

Run-flats or a spare: know which you’ve got

A lot of F and G generation BMWs don’t carry a spare wheel. They came with run-flats instead. You’ll see RFT or ROF on the sidewall if yours has them. Run-flats will get you to a garage after a puncture, but only if your tyre pressure monitor is working. Check that the TPMS warning light isn’t on, and that the system hasn’t been reset incorrectly after a recent tyre change.

If your car does have a space-saver spare, check it’s inflated (space-savers usually need 70 psi) and that the jack and wheel brace are actually in the car. It sounds obvious. But plenty of people have opened the boot on the hard shoulder to find the toolkit’s been out for a month sitting in the garage.

Brakes

Pads and discs

Your dashboard will warn you when the pads are genuinely done, but that warning doesn’t tell you everything. Take a look through the wheel spokes before you set off. You should be able to see the pad sitting against the disc. If the friction material looks thin (less than 3–4mm), it’s worth getting it checked before a trip that’ll include motorway driving, mountain passes or any kind of loaded descent.

Have a look at the disc face too. It should be smooth and relatively even in colour. Deep grooves, or a noticeable raised lip around the outer edge, are signs of wear that the sensor alone won’t catch.

Brake fluid

This one gets forgotten because it doesn’t show up as a warning light. Brake fluid absorbs moisture over time, and once it does, its boiling point drops. That’s fine on normal roads. It’s less fine when you’re descending an Alpine pass with a full car and the brakes are working hard for twenty minutes straight.

BMW recommends changing brake fluid every two years. If you don’t know when yours was last done, a brake fluid tester from any motor factor costs about £3 and gives you an answer in seconds. If the result comes up red, get it changed before you go.

Lights

A failed bulb on UK roads usually means a ticking off if you’re unlucky. In France, Germany or Spain, while travelling it can mean a fine on the spot. Walk round the car: dipped headlights, main beam, front and rear fogs, both indicators, brake lights (reverse up to a wall or ask someone to stand behind), reverse light, number plate light. The whole lot. Takes two minutes.

If you’re driving in Europe, pick up a spare bulb kit, it’s a legal requirement in some countries, and most petrol stations don’t stock BMW-specific bulbs. Also worth knowing: if your car has projector or LED headlights, you’ll need to fit beam deflectors before driving on the right. Otherwise, your dipped beam will dazzle oncoming traffic. They’re cheap, widely available and just stick onto the lens, but you need the right shape for your specific headlight.

One last thing on lights: if your BMW has headlight washers, make sure the nozzles aren’t blocked and the reservoir’s topped up. Dirty headlights in heavy rain lose a surprising amount of effectiveness.

Cooling System

Check the coolant level when the engine’s cold; it should be between the MIN and MAX marks on the expansion tank. If it’s low, top it up with the correct BMW coolant (blue or green depending on your model. Don’t mix them). Brown or murky coolant is a sign the system hasn’t been flushed in a while, which is more of a long-term note than a pre-trip emergency, but worth knowing.

The bit that catches people out on older F generation cars in particular is the expansion tank itself. They’re plastic, and they crack, usually around the neck where the pressure cap sits. Run your finger around the base of the tank and along the top hose. If you see any dried residue, white or blue-green crystals, there’s a slow leak somewhere. That slow leak becomes a not-so-slow leak once the engine’s fully up to temperature and the system’s under pressure. Better to find it on the driveway than in a service station.

Battery

Modern BMWs have a lot going on electrically, even when parked. If you’re leaving the car at an airport for a week and coming back to it, a battery that was borderline before you left might not have enough left to start. The fact that it started fine this morning doesn’t mean it’s healthy.

If the battery is over three years old, it’s worth getting it tested. Not just “does it start the car”, a proper health test with a tool that reads the cold cranking amps. Most BMW-specific garages and good independents can do this in ten minutes. One thing to know: BMWs take AGM batteries, not standard ones, and the replacement needs to be registered to the car via diagnostics. If a battery was ever swapped without that registration step, the car’s been charging it on the wrong profile, which shortens its life. Worth flagging to whoever does the test.

Oils and Fluids

Engine oil first. BMWs can go a long time between services, which also means they can go a long time between oil top-ups, and they do use oil between services. That’s normal. Check the level through iDrive (Vehicle Information > Engine Oil Level on most F and G generation) or on the dipstick if your model has one. Low oil on a motorway run at sustained high speed is not something you want to find out about the hard way.

While you’re under the bonnet: windscreen washer fluid. It seems trivial until you’re behind a lorry on the M6 in October and you’ve run out. Check the power steering fluid if your car has hydraulic steering, and make sure the reservoir cap isn’t showing any sign of contamination.

Suspension and Steering

You know your car. If it’s been pulling slightly to one side, or there’s been a vague knock over speed bumps that you’ve been meaning to look into, now’s the time. Long drives surface the things that daily driving lets you ignore.

On F and G generation Bimmers, the front lower control arm bushes and the front thrust arm are common wear items at higher mileages. Worn bushes don’t always make noise. They show up as slight imprecision in the steering or a tendency to wander at motorway speeds. Neither is dramatic until you’ve been at 70 mph for four hours and it starts to feel like hard work.

If you’ve clipped a serious pothole recently, it’s also worth getting the wheel alignment checked. A car that’s pulling gently on normal roads will pull harder when it’s been loaded up and driven for hours. It also eats tyres unevenly, which is an expensive way to find out.

Before You Go: Quick Checklist

  • Tyre tread – 3mm+ recommended for long trips.
  • Tyre pressures – use loaded-car figure from door sill, check cold.
  • Run-flat / TPMS working, or spare inflated and toolkit in the car.
  • Brake pads and discs – visual check through the wheel.
  • Brake fluid – test moisture if over two years old.
  • All lights – full walk-round including number plate and fogs.
  • Beam deflectors for European driving (if required)-
  • Coolant level – check cold; look for dried residue on hoses/tank.
  • Battery health — especially if over three years old
  • Engine oil level – via iDrive or dipstick.
  • Washer fluid topped up.
  • Any knocking, pulling or steering vagueness – get it looked at.

None of this takes long. An evening in the week before you go, a torch and someone to press the brake pedal, and you’ve covered most of it. The bits you can’t check yourself, battery health, alignment, suspension, are a quick visit to a decent independent BMW specialist.

And if anything comes up that needs replacing before you set off, used genuine BMW parts are often a perfectly sensible way to go, especially for things like sensors, expansion tanks or suspension components where it’s the genuine part you want, not a generic substitute. Owners looking for F, G and U generation components often find what they need at mtautoparts.com.

Have a good trip.

Disclaimer: This article is for general guidance only. Always consult a qualified technician before undertaking any repairs or if you have concerns about your vehicle’s roadworthiness. Requirements for vehicle equipment when driving in Europe vary by country. Check the current regulations for your destination before travelling.

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