Preparing your car for a part exchange

Why a little effort pays off at the dealership

Part exchange is the simplest way to move from one car to the next, but it is also the moment when every scuff, warning light and missing service stamp gets priced in. A dealer has to refurbish whatever you hand over, and they will deduct for anything that costs them time or money. Spend a weekend on preparation and you can realistically add several hundred pounds to the offer — money that goes straight towards your next car.

West Country drivers have their own quirks to contend with. Salt-laden air along the Devon and Cornwall coast, mud from lanes in Somerset and Dorset, and long A-road commutes all leave their mark. None of it is fatal, but it is all visible when an appraiser walks round the car with a clipboard.

Clean the car as though you were selling it privately

First impressions are not a cliché in the trade. An appraiser who opens the door onto a spotless interior unconsciously expects to find a well-kept car underneath. A grubby one raises questions about servicing and mechanical sympathy before a wheel has turned.

• Wash and dry the bodywork, then polish it if time allows. Pay attention to the wheel arches and sills, where West Country mud collects.
• Clean the wheels properly, including the inner faces. Brake dust that has baked on looks like long-term neglect.
• Vacuum the whole interior, including the boot and under the seats. Remove pet hair with a rubber brush or a dampened glove.
• Wipe down the dashboard, door cards and centre console with a mild interior cleaner. Avoid shiny silicone dressings — they read as cover-up.
• Clean the glass inside and out, and check the door shuts, fuel filler surround and boot lid.
• Remove personal items, child seats and clutter. An empty car feels cared for.

If the car has been smoked in or carried dogs regularly, consider a professional valet. Fifty to a hundred pounds spent here can be worth far more in the offer.

Gather the paperwork that proves the story

A service history is the single most valuable document you own when part exchanging. It is evidence, not sentiment.

• Collect the service book, all invoices and MOT certificates, and put them in a folder in date order.
• Check that the service book is stamped and that the mileage on the invoices matches the odometer.
• Include receipts for tyres, cambelt changes, clutches or major repairs — they demonstrate genuine maintenance.
• Have the V5C registration document to hand. Make sure your name and address are current and the vehicle details match.
• Find the spare key. Two keys rather than one is worth real money to a dealer.

A gap in the history does not have to be fatal, but turn up able to explain it honestly rather than being caught out by a question you cannot answer.

Fix the small faults before they are used against you

Dealers price defects at retail, not at trade, so a £40 bulb can knock far more off the offer than it costs to put right. Deal with the cheap wins first.

• Replace blown bulbs, including number plate and interior lights.
• Top up screenwash, coolant and oil, and check tyre pressures. Soft tyres on a test drive suggest neglect.
• Inspect the tyres for uneven wear and any tread approaching the legal limit. Matching brands on each axle look better.
• Wipers that smear, a weak battery or a noisy wheel bearing should be sorted if the cost is modest compared with the likely deduction.
• Clear warning lights where it is a simple sensor, but never try to hide a fault. A code reader will find it.

Do not spend thousands chasing perfection. The aim is to remove reasons for a low offer, not to rebuild the car for someone else's forecourt.

Set your expectations and do your homework

Check what similar cars are advertised for on forecourts before you visit. Then expect a trade figure meaningfully below that retail price, because the dealer must cover preparation, warranty, VAT and a margin.

An online valuation is a starting point, not a guarantee. Mileage, colour, specification and local demand all shift the number. Unusual colours and trim can be harder to move on in a rural county, while a well-specified estate or a dependable hatchback tends to do well.

If you have finance outstanding, ask your lender for a settlement figure in advance so you know exactly where you stand. If your car is an electric vehicle, bring the battery health report or recent charging data if you have it — it answers the question every appraiser is quietly asking.

On the day: presentation, honesty and a clean handover

Arrive with the car washed, fuelled to a reasonable level and warmed up if the weather is cold, so it shows its best behaviour. Hand over the keys, the folder of paperwork and the V5C together.

Be upfront about any faults you have not fixed. Dealers find them regardless, and volunteering them builds goodwill that can be worth more than the argument you avoid. Get the agreed figure and any settlement details confirmed in writing before you sign anything, and take a copy away with you.

If the offer falls short of your expectation, you are always free to walk away, tidy up the remaining issues and try again — or sell privately for a higher price in exchange for the extra effort.