The investigation started because the transmission ECU reported a value of 655,350 km, which clearly didn't match the dashboard mileage.

The first thing we did was compare the mileage stored across different ECUs.

Here are some of the values retrieved from the vehicle:

As you can see, the numbers are almost identical to the dashboard mileage.

This is usually a very good sign. When mileage values stored in multiple ECUs match the dashboard, it strongly suggests that the odometer reading is genuine.

If the vehicle had been rolled back, it's common to find at least one module storing a higher mileage than what the dashboard shows.

In this case, none of the modules showed a higher value.

Some control units store mileage when specific events occur. These records are extremely useful because they allow us to reconstruct the vehicle's history.

Here are some of the historical values we found.

These numbers create a perfectly logical timeline leading up to the current mileage.

This kind of chronological progression is exactly what we expect to see on a vehicle with authentic mileage.

The investigation actually started because of the following transmission values.

The value 655,350 km immediately looked suspicious and could easily make someone think the car actually has over 600k km.

But the rest of the transmission data clearly shows that these counters cannot be interpreted as real mileage.

For example:

• the gearbox mileage shows a negative number
• the engagement counter is 2,147,483,647

That last number is important. It is the maximum value of a signed 32-bit integer, which usually indicates counter overflow or corrupted data.

This strongly suggests that some of the DSG internal counters are invalid or corrupted, rather than representing the real mileage of the car.

Another useful piece of information is engine operating time.

The engine ECU reported approximately 3036 operating hours.

Using that value we can estimate the vehicle's average speed.

215,553 km ÷ 3036 hours ≈ 71 km/h

That is a perfectly reasonable average speed for a diesel vehicle used in mixed driving conditions.

If the car actually had 600,000 km, the engine operating hours would normally be much higher.

This calculation again supports the conclusion that the real mileage is close to the dashboard reading.

By combining the ECU records we can build a rough timeline of the vehicle.

Everything in this sequence follows a logical progression, which is another strong indicator that the mileage hasn't been manipulated.

Despite the suspicious 655,350 km value found in the DSG transmission ECU, the rest of the diagnostic data tells a very different story.

All major control modules store mileage values around 215,000 km, historical records increase logically over time, and engine operating hours match the expected mileage.

Because of this, the most likely explanation is that the transmission ECU contains corrupted or overflowed internal counters, rather than evidence of extremely high mileage.

Based on the available ECU data, the most probable real vehicle mileage is approximately 215,000–216,000 km, and there is no strong indication that the odometer was manipulated.