Get an On-Site Value Appraisal for Your Used Car

The classic valuation of a used car previously often required a visit to a fixed inspection center or a workshop. This involves time, appointment scheduling, and logistical challenges, especially if the vehicle is not registered or the seller does not want to leave the location. DIAVAG solves this problem with a mobile approach. The appraiser comes directly to the asset, whether it's the private garage, a dealer's yard, or a marina.

This mobile service is particularly valuable for transactions between private individuals. An on-site appointment within 24 hours makes it possible to make purchase decisions based on valid data without delaying the sales process. The independence of the appraiser is paramount. Since DIAVAG does not buy vehicles and does not broker repairs, the valuation remains objective and free of vested interests. This fundamentally distinguishes the service from purchase platforms, whose price offers often serve as bait and are renegotiated on site.

A professional value appraisal is not based on subjective estimates, but on measurable data. Every DIAVAG appraiser uses a standardized hardware case that enables precise diagnostics. A central element is the OBD2 scanner, which reads the fault memory and analyzes real-time parameters of the vehicle management system. This uncovers hidden defects that could otherwise go undetected during a simple test drive.

In addition, a paint thickness gauge is used. By measuring the paint thickness at various points on the body, it can be determined beyond doubt whether parts have been repainted or whether filler indicates a repaired accident damage. Tread depth gauges for the tires and digital multimeters for testing the electrical systems complete the technical setup. The entire process follows a fixed workflow that includes seamless, tamper-proof photo documentation. This data forms the basis for the subsequent PDF appraisal, which is finally reviewed and signed by a senior inspector.

The appraisal industry is often plagued by a lack of transparency regarding fees. Hourly billing, travel costs, and surcharges for documentation make costs for end consumers hard to calculate. DIAVAG relies on a strict fixed-price model. For standard cars, as well as boats, cargo bikes, or e-scooters, the fixed price is auf Anfrages. This price includes travel within the region, the on-site inspection, and the creation of the digital appraisal.

For more complex assets such as electric cars or home storage systems, as well as for high-value vehicles, a premium price of auf Anfrages applies. This surcharge is justified by the increased technical inspection effort, particularly the integrated Premium Battery Test. Customers thus know exactly what costs will be incurred already at the time of booking. There are no hidden fees. This model offers planning security for private sellers, buyers, and professional actors such as lawyers or estate administrators, who must quantify the cost of an appraisal in advance as part of their mandates.

The legal usability of an appraisal depends significantly on the independence of its author. DIAVAG acts as an inspection body according to the ISO/IEC 17020 Type A standard. This is the highest level of independence, as the company carries out no activities that could conflict with the inspection task. Unlike workshops, which profit from repairs, or dealers who want to push down the purchase price, DIAVAG delivers a neutral picture of the current condition.

All appraisers work according to the guidelines of the BVSK (Federal Association of Freelance and Independent Automotive Experts). This qualification ensures that the appraisals meet the high requirements of insurers, banks, and courts. Whether for a lease return, an insurance case, or an estate dispute: an appraisal signed by an independent, certified body provides the necessary evidentiary weight to assert legitimate claims or fend off unjustified demands.

For used electric vehicles, the battery is the value-determining component. Conventional appraisals that only assess the visual condition and tread depth fall short here. An electric car with low mileage can still have a degraded battery if charging behavior was suboptimal. DIAVAG therefore integrates the Premium Battery Test as standard into every electric car appraisal for auf Anfrages.

This test determines the state of health (SoH), i.e. the battery's condition compared to new condition. Parameters such as cell balance, actual kWh capacity, charging curve, and internal resistance are analyzed. This in-depth diagnosis goes far beyond the basic displays on the onboard computer, which often provide only flattering figures. With a view to the EU Battery Passport, mandatory from February 2027, DIAVAG is already able today to create the necessary transparency for the used market of electric mobility. This protects buyers from expensive purchase mistakes and allows sellers to document the value of their well-maintained battery in black and white.

There are situations in which a simple online value check is not enough. In legal disputes, which frequently occur in the context of inheritance or divorce, notaries and lawyers require robust evidence of existing assets. A DIAVAG value appraisal meets these requirements by adhering to the JVEG framework (Judicial Remuneration and Compensation Act) and BVSK compliance. The detailed documentation of the vehicle's condition on the reference date prevents later disputes about depreciation or hidden damage.

A current value appraisal is also crucial in insurance cases. After an accident through no fault of one's own, it serves as the basis for determining the replacement value. Without such a document, insurers often rely on average values from databases that do not take into account individual value-enhancing factors or the excellent maintenance condition of a vehicle. By optionally depositing a notarial hash on the Polygon blockchain, DIAVAG also provides tamper-proof proof of the authenticity of the appraisal at the time of creation. For specific legal questions, you should always consult a qualified lawyer or notary.

The market for vehicle valuations is diverse, but the approaches differ significantly. While large organizations such as TÜV or DEKRA primarily specialize in sovereign tasks such as the periodic technical inspection (HU), DIAVAG's focus is on mobile valuation and specialized diagnostics. The following table illustrates the differences:

Classic inspection organizations often do not offer specialized valuations for niche assets such as home storage systems or sport boats. In addition, mobile availability there is usually associated with high surcharges. Online purchase platforms, on the other hand, are not neutral appraisers but market participants with their own profit interest in the later resale of the vehicle.

For commercial actors such as car dealerships or fleet operators, speed and process integration are crucial. When a large number of vehicles must be valued monthly, manual processes reach their limits. DIAVAG offers customers with a volume of 50 appraisals per month individual terms and a technical connection via a DMS API (Dealer Management System). This makes it possible to launch appraisal orders directly from the familiar software environment and automatically transfer the results to inventory management.

Dealers also benefit from the option of purchasing the DIAVAG hardware case, including the software license, for auf Anfrages. This allows their own employees to carry out the standardized inspection, while the final review and signing continue to be done by DIAVAG's senior inspectors. This ensures the quality and independence of the appraisal while speeding up operational processing. For fleet managers, the system offers efficient residual value tracking, which is essential for accounting and planning vehicle changeovers.

To ensure a smooth on-site inspection process, vehicle owners should make some preparations. The vehicle should be presented in a clean condition so that paint damage and visual defects can be documented beyond doubt. In addition, all relevant documents must be on hand, in particular the vehicle registration certificate Part I and, if available, the service booklet as well as invoices for recent repairs or maintenance.

The appointment itself usually takes less than 15 minutes. The appraiser only needs access to the vehicle and the OBD2 port. After the technical assessment and photo documentation, the data is transmitted encrypted to headquarters. There, the measurement data is evaluated and the BVSK-compliant PDF report is created. The customer receives the finished appraisal by email the same day. This highly efficient process minimizes vehicle downtime and ensures that the valuation information is immediately available for sale or legal purposes.