When Smart Cars Go Faulty: Why Google Can’t Diagnose Vehicle Fraud

In an extensive study, German researchers examined data from 300,000 connected vehicles to uncover the prevalence of automotive fraud. Their findings revealed that 23% of Mini models and 27% of BMW 5 Series (E60 generation) had experienced some form of manipulation.

These statistics underline a growing concern for consumers: even high‑end, technologically advanced cars are not immune to tampering. While the research raises valid concerns, it also highlights the importance of reliable verification tools for prospective buyers.

On average, 15% of the BMWs inspected were tampered with, and 90% of those incidents involved the odometer reading. The remaining 10% targeted the vehicle’s identity data. One striking example involved a 2000‑model BMW 5 Series that displayed only 18,703 miles on its speedometer, while the actual mileage recorded by the vehicle’s control units was 120,564 miles—an increase that could inflate the car’s market value by thousands of pounds.

Why Traditional Checks Fall Short

Consumers often rely on visual inspections and paperwork to verify a car’s history. However, modern vehicles are equipped with multiple electronic control units (ECUs) that store accurate mileage and usage data. Fraudsters can manipulate the electronic mileage clocks, rendering visual and paper checks ineffective. As a Carly spokesperson warns, “Fraud is so pervasive that merely checking the odometer and paperwork can be misleading.”

Using Carly Car Check to Uncover the Truth

Carly Car Check offers a comprehensive solution by interrogating up to 50 ECUs within a vehicle. The app cross‑checks the data stored in each unit against the dashboard display, flagging discrepancies. It also provides route data, fuel economy, average speed, and journey times, allowing buyers to verify whether the car’s usage history aligns with the owner’s claimed driving patterns.

For example, the app can confirm whether a “careful church‑going” driver truly followed a routine of short, infrequent trips, or if the vehicle was subjected to more intense usage. This level of detail is crucial because short trips often fail to provide the necessary wear and tear to maintain components like filters, potentially leading to costly replacements—Carly estimates a new filter could cost up to £1,000.

Beyond mileage, Carly also lists fault codes related to engine performance, braking systems, infotainment, climate control, and steering. As cars become increasingly sophisticated, detecting faults requires a deeper, data‑driven approach rather than relying on intuition alone.

Author: Nick Booth, freelance technology writer.