When buying a used car, checking its service history is just as important as checking its MOT history.
A full service history can show whether the vehicle has been properly maintained, while missing or incomplete records may indicate neglected maintenance that could lead to expensive repairs.
In this guide, we'll explain how to check a car's service history, what documents to look for and the warning signs that every buyer should know.
What Is a Service History?
A vehicle's service history is a record of the maintenance carried out throughout its life.
It may include:
- Routine servicing
- Oil and filter changes
- Brake fluid replacement
- Air and cabin filter changes
- Spark plug replacement
- Timing belt or timing chain work
- Brake repairs
- Clutch replacement
- Major inspections
These records help demonstrate that the vehicle has been cared for according to the manufacturer's recommended schedule.
Why Is Service History Important?
Regular servicing helps keep a vehicle reliable, efficient and safe.
A complete service history can:
- Increase the car's value.
- Show that routine maintenance has been completed.
- Reduce the risk of unexpected repair bills.
- Provide confidence when buying a used vehicle.
Cars with little or no service history may have missed important maintenance that isn't immediately obvious during a viewing.
What Is a Full Service History?
A Full Service History (FSH) generally means the vehicle has been serviced at the recommended intervals throughout its life.
This doesn't necessarily mean every service was carried out by the manufacturer. Independent garages can also provide high-quality servicing, provided the work has been properly documented.
A full service history might include:
- Service book stamps
- Garage invoices
- Maintenance receipts
- Digital service records
- Manufacturer service printouts
The more evidence available, the better.
How to Check a Car's Service History
1. Ask to See the Service Book
Many vehicles have a stamped service book showing when each scheduled service was completed.
Check:
- Dates
- Mileage
- Garage details
- Dealer or garage stamps
The mileage should increase consistently over time.
2. Check for Invoices
Invoices often provide more detail than a service book.
Look for evidence of:
- Oil changes
- Brake work
- Timing belt replacement
- Suspension repairs
- Battery replacement
These documents help confirm the vehicle has received regular maintenance.
3. Check Digital Service Records
Many newer vehicles no longer use traditional service books.
Instead, servicing is recorded digitally by the manufacturer.
Ask the seller whether digital records are available.
4. Compare the MOT History
Service records should broadly match the vehicle's MOT history.
Use our free MOT History Checker to compare:
- Recorded mileage
- MOT dates
- Advisory notices
- Previous failures
If the service records don't align with the MOT history, ask the seller to explain the discrepancy.
Warning Signs
Be cautious if:
- The service book has missing years.
- Multiple stamps appear to use identical handwriting.
- Invoices are missing.
- Mileage doesn't increase consistently.
- The seller cannot explain missing records.
Missing documentation doesn't automatically mean there's a problem, but it should encourage further investigation.
What Maintenance Should You Expect?
The exact service schedule depends on the vehicle, but common maintenance includes:
Engine oil and filter
Typically every 12 months or 10,000–12,000 miles.
Air filter
Usually replaced every 2 years.
Cabin filter
Usually replaced every 2 years.
Brake fluid
Typically changed every 2 years.
Spark plugs
Usually replaced every 40,000–60,000 miles, depending on the manufacturer.
Timing belt
Replaced according to the manufacturer's recommended service interval. This varies between vehicles, so always check the service schedule.
Always check the manufacturer's servicing recommendations for the specific vehicle you are buying.
Does MOT History Replace Service History?
No.
An MOT confirms that a vehicle met the minimum legal roadworthiness standards on the day it was tested.
A service history shows how well the vehicle has been maintained over many years.
Ideally, you should check both before buying.
Read our guide on What Makes a Good MOT History When Buying a Used Car to understand what a healthy MOT record looks like.
Questions to Ask the Seller
Before purchasing a used car, ask:
- Has the car been serviced every year?
- Where was it serviced?
- Are all invoices available?
- Has the timing belt been replaced?
- Has any major repair work been carried out?
- Are there any missing service records?
A genuine seller should be happy to answer these questions.
Final Thoughts
A complete service history doesn't guarantee a perfect car, but it provides valuable evidence that the vehicle has been looked after.
Always combine a service history check with an MOT history check, a thorough inspection and a test drive before making a purchase.
Spending a little extra time checking the paperwork could save you from costly repairs in the future.
Check the MOT History for Free
Before buying any used vehicle, use our free MOT History Checker to view previous MOT results, recorded mileages, advisories and failures. It only takes a few seconds and could help you spot issues before you buy.