Expert weighs in: the unseen side of vehicle damage – why data is critical for accurate appraisals

When a car gets into an accident, determining the true extent of the damage is rarely straightforward. Repair costs can quickly become a point of contention, especially when drivers are dissatisfied with insurance payouts and seek independent appraisals for a more detailed assessment.

While auto appraisal may appear to be a purely technical process, in reality, it goes beyond what can be seen or measured. Today, professionals increasingly rely on external data sources, such as carVertical, to understand a vehicle’s past more comprehensively.

Damage disputes are rarely about whether – but how much

Florian Mengert Expert Office is a Germany-based vehicle appraisal company specializing in accident reports, damage assessments, and vehicle valuations. The company also operates as a TÜV Süd automotive partner.

According to Sascha Paaß, Expert for damage and valuation reports at the company, disputes over vehicle damage are extremely common – but not necessarily for the reasons many expect.

“Insurance companies often state that they will “cover the damage,” which many customers interpret as full reimbursement. In reality, this only means they accept liability in principle. Disputes usually arise over individual repair positions,” explains Paaß.

Many types of damage – particularly involving plastic components or high-quality repairs – are not always clearly visible or technically measurable, even for experienced professionals. In other words, the disagreement isn’t about the accident itself. It’s about what remains hidden after it.

Why vehicle history data is critical for accurate appraisals

For appraisers, one of the most important tasks is distinguishing between current damage and pre-existing issues. That line, however, is not always easy to draw.

This is where vehicle history data becomes essential.

Even the most thorough physical inspection has its limits. Some repairs leave little to no trace, especially when modern materials or cosmetic techniques are involved. Without historical data, these cases can easily slip through unnoticed.

“A physical inspection alone cannot fully reveal a vehicle’s history. Modern materials such as plastics make it difficult to detect previous repairs. Therefore, external data sources such as carVertical reports or diagnostic tools like OBD scans are essential to identify prior damage and mileage inconsistencies,” explains Paaß.

In practice, this means combining hands-on expertise with reliable data – not choosing one over the other. Paaß also highlights a broader market dynamic: damaged vehicles are frequently exported, repaired abroad, and later reintroduced into the market. Sometimes the history is transparent. Often, it is not.

The complexity behind “simple” damage cases

At first glance, many damage cases seem straightforward. But as Paaß points out, appearances can be misleading.

Rear-end collisions are a typical example. Modern bumpers are designed to absorb impact and return to their original shape, often showing only minor surface damage. However, once removed, underlying structures, such as the spare wheel well, rear panel, or mounting components, may reveal significant deformation.

Suspension and axle components present another challenge. A vehicle can look visually intact, yet precise measurements may uncover serious misalignment requiring costly repairs.

“The most severe cases are those where the damage is not visible at first glance. Vehicles often appear to have only minor cosmetic damage, but once dismantled or properly inspected, hidden structural or suspension damage can result in repair costs reaching tens of thousands of euros,” shares his experience Paaß.

Why mid-range damage is often the biggest risk

Contrary to common perception, the greatest risks in the used car market don’t always come from severely damaged or total-loss vehicles.

According to Paaß, mid-range damage – typically up to €15,000 – is often more problematic. These cases occur frequently, can be repaired to a high standard, and are therefore much easier to conceal. For dealerships and appraisers, this makes them particularly difficult to detect and assess accurately.

“In Germany, many economic total losses arise for commercial rather than technical reasons. Due to high labor costs, vehicles are often classified as uneconomical to repair domestically, even though repairs would be technically feasible. As a result, such vehicles are frequently exported to countries with lower labor costs, repaired there, and later reintroduced into the Western European market,” explains Paaß.

This cross-border movement creates additional layers of uncertainty and increases the importance of reliable historical data.

If a vehicle is sold as accident-free and later identified as previously damaged through a carVertical report, the consequences can include contract rescissions, disputes, and financial losses.

Such checks therefore serve a dual purpose: they inform decisions and protect against risk. Or put simply – in a market where not all damage is visible, data becomes part of the inspection.