Used-Car Checklist: What You Really Need to Inspect Before Buying

Why a used-car inspection matters so much

The used-car market offers a huge selection — and a correspondingly large number of risks. Hidden defects, manipulated mileage, undeclared accident damage or missing service history can turn a supposed bargain into a costly mistake. With a structured checklist, you stay on the safe side.

The majority of used-car purchases in Germany take place between private individuals — and in those cases the statutory warranty does not apply. That makes a thorough inspection before the purchase all the more important: whatever you discover after the handover is, as a rule, your problem.

Preparation: finding the right vehicle

Before you head off to the viewing, it pays to do a clear needs analysis:

• Intended use: A commuter car, a family car or a weekend vehicle? This affects the body style and the equipment you need.
• Budget: Calculate realistically — including insurance, road tax, fuel and possible repairs in the first few months.
• Equipment: Which features do you really need? Air conditioning, navigation, heated seats — prioritising helps you filter.

On platforms such as mobile.de, AutoScout24 and Kleinanzeigen.de it pays to set price alerts and check listings regularly. Specific search filters (year, mileage, fuel type) save time.

Step 1: Read the listing critically

Even before you make first contact, the listing offers important clues about how trustworthy the offer is:

• Is the description detailed — with information on equipment, mileage, previous owners and known defects?
• Are there enough photos (exterior, interior, engine bay, tyres)?
• Does the price line up with the market for comparable models?
• Are the service booklet and a current HU inspection mentioned as being available?

A patchy listing with no photos and no information on the vehicle's history is often a warning sign. Reputable sellers answer questions openly and without dodging them.

Step 2: Making contact and the first questions

Get in touch before the viewing — by phone is better than in writing, because you can gauge the reaction directly. Important questions to ask up front:

• Why is the vehicle being sold?
• How many previous owners has it had?
• Has the vehicle been in any accidents or undergone major repairs?
• Is there a complete, gap-free service booklet?
• When was the last main inspection (HU)?

An open and transparent seller answers readily. Hesitant or evasive answers are a reason for caution — and sometimes the best reason to skip the offer.

Step 3: Checking the vehicle history

Before you physically inspect the vehicle, get an overview of its past:

• Accident history: Ask specifically about accidents and request proof (repair invoices, appraisal reports). Digital VIN reports can surface reported accidents.
• Service history: Has the vehicle been serviced regularly? A complete, gap-free service booklet with stamps is the best proof. Any missing entries need to be explained.
• Mileage: Do the entries in the service booklet match the current odometer reading? Implausible jumps or declining figures are warning signs.
• Previous owners: Fewer previous owners does not automatically mean better care — but many changes of owner in a short period can point to problems.

Step 4: Checking the technical condition

A thorough on-site vehicle inspection covers:

Engine and engine bay

• Does the engine run smoothly and without noises when started?
• Are there oil traces, fluid leaks or signs of rust in the engine bay?
• Is the exhaust smoke-free? White, blue or black smoke points to different engine problems.

Fluids

• Engine oil: check the level and colour — dark or foamy oil is a warning sign.
• Coolant: cloudy or yellowish-discoloured coolant can indicate a faulty head gasket.
• Brake fluid: a low level or heavily discoloured fluid points to neglected maintenance.

Brakes and suspension

• Check the brake discs for deep grooves or uneven wear.
• Shock absorbers: push the vehicle down at one corner — does it rebound properly without bouncing afterwards?
• Tyres: is the tread even on all four wheels? Uneven wear can point to wheel alignment problems.

Bodywork and paint

• Examine scratches, dents and rust spots closely — especially the wheel arches, sills and lower door edges.
• Uneven panel gaps between the door and the wing, or between the bonnet and the headlight, can indicate accident repairs.
• Colour mismatches between adjacent surfaces are a sign of respraying.

Step 5: The test drive

The test drive is one of the most important parts of any used-car inspection — allow plenty of time and drive on a variety of roads:

• Steering: Does it respond precisely, does the vehicle pull to one side or does the steering wheel vibrate?
• Clutch and gearbox: Do the gears engage easily and cleanly? Is the clutch slipping? With automatic gearboxes, the shifts should be barely noticeable.
• Suspension: Does the vehicle thud, bounce or sway over bumps more than expected?
• Brakes under load: Does the vehicle brake in a straight line, evenly and without squealing or vibration?
• Noises: Any rattling, clattering or whistling at certain speeds or during load changes?

Take the test drive in daylight — in the dark, damage is barely visible.

Step 6: Checking the documents

Before the purchase, all documents must be complete and correct:

• Vehicle title (registration certificate part II): Do the chassis number, date of first registration and vehicle data match the vehicle? The title should be available in the original.
• Vehicle registration (registration certificate part I): Up to date and made out to the seller.
• HU report (main inspection): When was the last HU? Are there any defects recorded?
• Service booklet: Complete and gap-free, with stamps from garages or dealers? Stamps alone, without a date or mileage, are worthless.
• Keys: Are all keys (including the spare key) present?

Step 7: Sales contract and legal protection

A solid written sales contract is a must when buying a used car. It should include:

• The full personal details of buyer and seller
• Vehicle data (brand, model, chassis number, colour)
• The current mileage at the time of handover
• The purchase price and payment terms
• A description of the condition and any known defects
• A clause on warranty (in a private sale it is often excluded — and that must be stated explicitly in the contract)
• The date and signatures of both parties

Verbal agreements do not count. Everything you agree must be set down in the contract.

Dealer vs. private sale: what you need to know

Buying from a dealer: A statutory warranty of at least 12 months, often a larger selection and inspected vehicles. The price is usually higher than on the private market, with less room to negotiate.

Buying privately: Often a lower price and more room to negotiate. No statutory warranty — whatever surfaces after the handover is, as a rule, your risk. An independent on-site check is especially advisable here.

When a professional check makes sense

If you do not have much technical experience yourself, if you are buying from far away or if you are considering a vehicle in the higher price bracket, you should bring in an independent inspector. checkdenwagen sends an inspector directly to the seller — anywhere in Germany, at a fixed price from €289 incl. VAT and travel. You save yourself the journey and receive a structured report on the bodywork, mechanics, documents and overall condition within 24 hours.