Pre-Purchase Technical Inspection: What to Check and Why

A professional Pre-Purchase Inspection (PPI) is one of the best investments you can make when buying a used car. It typically costs 100–300 EUR and can save you thousands in hidden defects.

What Does a Technical Inspection Include?

1. Visual Exterior Inspection

Paint thickness measurement across the entire vehicle (reveals resprays after accidents)
Checking panel gaps and body panel alignment
Window condition (original vs. replaced)
Underbody inspection on a lift — corrosion, leaks, damage

2. Engine and Drivetrain Check

Cold start — reveals starting problems
Exhaust smoke check (white = coolant, blue = oil)
ECU diagnostics (OBD) — error codes, stored faults
Cylinder compression test (for older engines)
Timing system check (belt/chain) — condition and replacement schedule

3. Transmission Check

Smooth shifting (manual: no grinding, automatic: no jerking)
For DSG: mechatronics and adaptation value check
Testing all modes (D, R, S, manual mode)

4. Suspension and Brakes

Shock absorber condition — visual and road test
Brake pad and disc thickness
Condition of control arms, ball joints, and bushings
Wheel alignment (uneven tire wear)

5. Electrical Systems

Functionality of all lights, sensors, and driver assistance systems
Battery condition (capacity, voltage)
Air conditioning — functionality and cooling performance
Infotainment, camera, parking sensors

6. Test Drive

Behavior at various speeds
Vibrations, knocking, unusual noises
Straight-line driving (vehicle does not pull to one side)
Functionality of all driver assistance systems (ABS, ESP, cruise control)

Where to Get an Inspection?

Germany: TÜV, DEKRA, GTÜ, independent workshops
Belgium: authorized inspection stations
Services like CARFAST: we arrange a complete inspection for you directly on site

How Much Does It Cost?

Basic inspection: 100–150 EUR
Extended with diagnostics: 150–250 EUR
Comprehensive with report and photo documentation: 200–350 EUR

The result is a detailed report listing all defects found, estimated repair costs, and a recommendation on whether to buy the vehicle. It is your insurance against expensive surprises.