VIN-Based Car Part Lookup with TecDoc API

Identifying a car part by VIN with the TecDoc API means sending a vehicle's 17-character chassis code to TecAlliance's webservice, which returns the exact vehicle configuration (make, model, engine, year) and, based on that, the compatible parts. In practice, your store no longer asks the customer to pick a make, model, and engine from long dropdown lists; it pulls that data automatically from the VIN and shows the matching parts directly.

Many integrators use the generic term "SearchByVIN" for this feature, but that is not the literal name of an operation in TecAlliance's Pegasus 3.0 WSDL contract. Real VIN-based identification happens through several distinct operations - getVehicleDataByVINExt, getOEArticlesByVIN, getPartsByVINExt, and getVehiclesByVIN - each with a specific technical role. This article explains exactly what each one does, what a real SOAP call looks like, and how to implement the flow in a Laravel/PHP store, without inventing operation or field names we cannot confirm.

What "identifying a car part by VIN" means in the TecDoc catalog

VIN (Vehicle Identification Number) is the unique 17-character code assigned to every vehicle, used internationally to identify a car precisely. TecDoc is the technical auto parts catalog operated by TecAlliance, which links every article to the vehicle configurations it fits (model, engine, production year, body type).

When an online store "searches by VIN," it actually sends the chassis code to TecAlliance's webservice, gets back the internal vehicle identifier (also known as KType), and, based on that, can request the list of compatible parts or the associated OE (Original Equipment) codes. The difference from a classic "make → model → engine" search is that the VIN removes ambiguity: two cars from the same range and year can still have different equipment, and the VIN tells them apart exactly.

How VIN search actually works: the real operations in the Pegasus 3.0 WSDL

We directly inspected the public WSDL contract of the Pegasus 3.0 webservice (TecdocToCatDLB.soapEndpoint) and confirmed that four operations are explicitly dedicated to VIN-based identification:

getVehicleDataByVINExt - identifies the vehicle from its VIN (officially documented as "VIN Lookup"); this is the base operation for retrieving the car's technical configuration.
getVehiclesByVIN - returns the list of vehicles matching a given VIN, useful when one VIN can correspond to several close technical variants.
getOEArticlesByVIN - returns the OE (car manufacturer) codes associated with the vehicle identified by VIN.
getPartsByVINExt - returns the aftermarket catalog parts identified from the VIN, documented as "Parts by VIN".

This list comes directly from inspecting the WSDL contract, not from a generic guess. If you have seen documentation or articles referring to a "SearchByVIN" operation, treat the term as a colloquial label used to describe the feature, not the exact technical name you will find in your own WSDL.

WSDL operation	Technical role	When you use it
`getVehicleDataByVINExt`	Identifies the exact vehicle configuration from the VIN	First call in the VIN search flow
`getVehiclesByVIN`	Returns the possible vehicle variants for the VIN	When the VIN can match several configurations
`getOEArticlesByVIN`	Returns the car manufacturer's OE codes	For displaying original-code equivalents
`getPartsByVINExt`	Returns the compatible aftermarket parts	For the product list shown in the store

TecDoc license and access conditions for the VIN identification functions

Access to the operations above requires an active TecAlliance license; without it, calls to the webservice will not work, no matter how correctly the code is written. TecAlliance does not publish a single price for this functionality, and the exact availability of the "by VIN" operations can vary depending on the package you contract. Treat any cost figure found online as indicative, and confirm directly with TecAlliance or their representative which VIN operations are included in your offer.

For the full licensing process and a broader discussion of costs, we covered this in our complete TecDoc license guide for online auto parts stores . The exact rights to store VIN-derived data locally (for example, how much you can retain in your own database) also depend on the contract, and we discuss this in our article on common TecDoc integration errors .

SOAP request and response structure for VIN-based identification

Below is a simplified, anonymized structure, for illustrative purposes, of a SOAP call to getVehicleDataByVINExt. The exact names of the authentication fields and any additional parameters can vary slightly depending on the contract version you receive from TecAlliance, so confirm them in your own WSDL before writing production code.

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"> <soap:Body> <getVehicleDataByVINExt> <provider>####</provider> <apiKey>####</apiKey> <lang>en</lang> <country>RO</country> <vin>XXXXXXXXXXXXXXXXX</vin> </getVehicleDataByVINExt> </soap:Body> </soap:Envelope>

The response, simplified, contains the vehicle identifier and basic technical attributes:

<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"> <soap:Body> <getVehicleDataByVINExtResponse> <vehicleId>####</vehicleId> <manuId>####</manuId> <modelId>####</modelId> <!-- other technical attributes: engine, year, body type --> </getVehicleDataByVINExtResponse> </soap:Body> </soap:Envelope>

Using vehicleId, you then call getPartsByVINExt or getOEArticlesByVIN to actually retrieve the parts. In practice, separate the two calls (vehicle identification, then parts) so you can quickly show the user the confirmed vehicle before loading the full product list.

Practical implementation in Laravel/PHP: SOAP client and database mapping

In a Laravel store, we recommend wrapping every TecDoc call inside a dedicated service (for example TecDocService), rather than calling SoapClient directly from a controller. For the full architecture of such a project - including the cars*, catalog_products, and parts_categories table structure - see our article on Laravel architecture for auto parts stores with TecDoc . The example below shows only the minimal flow for a VIN search:

$client = new SoapClient( config('tecdoc.wsdl_url'), ['trace' => true, 'exceptions' => true] ); try { $vehicle = $client->getVehicleDataByVINExt([ 'provider' => config('tecdoc.provider_id'), 'apiKey' => config('tecdoc.api_key'), 'lang' => 'en', 'country' => 'RO', 'vin' => $validatedVin, ]); $parts = $client->getPartsByVINExt([ 'provider' => config('tecdoc.provider_id'), 'apiKey' => config('tecdoc.api_key'), 'vehicleId'=> $vehicle->vehicleId, ]); } catch (SoapFault $fault) { Log::warning('TecDoc VIN lookup failed', [ 'vin' => substr($validatedVin, 0, 8) . '...', 'fault' => $fault->getMessage(), ]); // fallback: clear message to the user + manual make/model search }

The code above is simplified for clarity; the real authentication parameters (the provider/apiKey field names) must be confirmed in the WSDL of your own contract, since they can differ between TecAlliance clients. What matters is the principle: validate the VIN before calling, handle SoapFault explicitly, and provide a clear fallback for the user, not a blank page.

Once you receive the response, map the fields into your local structure like this:

Field from the TecDoc response	Used for	Recommended local mapping
`vehicleId`	The exact vehicle configuration (KType)	`cars` / `car_engines` tables
`manuId`	The part manufacturer (brand)	`catalog_products.brand_id`
`articleId`	TecDoc's internal article identifier	`catalog_products.tecdoc_article_id`
OE code (from `getOEArticlesByVIN`)	The car manufacturer's original code	`part_original_codes`

WSDL/SOAP vs REST API for VIN lookup: how to choose the right option

Besides the classic SOAP/WSDL webservice (Pegasus 3.0), TecAlliance also offers newer REST/JSON API documentation, which exposes its own VIN search endpoints. The choice between the two is not "which one is generally better," but "what your contract offers and what integrates better with your existing tech stack."

Criterion	WSDL/SOAP (Pegasus 3.0)	REST/JSON API (newer generation)
Data format	XML, strict WSDL contract	JSON, RESTful style
PHP/Laravel integration	Native `SoapClient`, no extra dependencies	Standard HTTP client (e.g. Guzzle), easier to test
Learning curve	Steeper (XSD, SOAP faults, strict contract)	Friendlier for modern web teams
VIN operation availability	Confirmed directly in the public WSDL (4 dedicated operations)	Documented separately, as VIN Search endpoints
Actual availability for your project	Depends on your active TecAlliance contract/license	Depends on your active TecAlliance contract/license

In practice, we recommend SOAP/WSDL for projects continuing an existing TecDoc integration (most stores in Romania already run on Pegasus 3.0), and REST API for new projects with no integration history, if your license and technical availability allow it. Always confirm with TecAlliance which option is explicitly included in your contract before choosing the architecture.

Common errors and risks when integrating VIN search (with mitigations)

Risk: assuming a generic operation name (e.g. "SearchByVIN") that does not exist in your real WSDL. Mitigation: check the exact list of operations in your own WSDL contract before writing code, instead of relying on names from articles or forums.
Risk: an incomplete VIN or one with ambiguous characters (letters confused with digits). Mitigation: validate the VIN format (17 characters, no I/O/Q) before sending the call to the webservice.
Risk: an unhandled SOAP fault that breaks the entire search page. Mitigation: wrap every call in a try/catch for SoapFault, with a clear fallback (message + manual make/model search).
Risk: confusing articleId (TecDoc's internal identifier) with the part code shown to the customer. Mitigation: explicitly document the mapping in your database, as shown in the table above.
Risk: storing VIN-derived data locally without checking the license terms. Mitigation: confirm contractually what you can retain locally and what must be requested in real time, as covered in our article on common TecDoc integration errors.
Risk: high latency on every VIN search, especially under heavy traffic. Mitigation: set a dedicated timeout for "by VIN" calls and, if your license allows it, apply a short cache for frequently searched VINs.

Practical checklist: a phased implementation plan for VIN lookup integration

Phase 1 (days 0-30, preparation): confirm your active TecAlliance license and which "by VIN" operations are included; request the full WSDL of your own contract (it may differ from the public example used in this article); test the getVehicleDataByVINExt call with sample VINs in a test environment.
Phase 2 (days 30-60, implementation): build the dedicated TecDocService that wraps SoapClient; implement VIN validation, SoapFault handling, and logging of key requests; map the received fields into catalog_products, cars*, and part_original_codes.
Phase 3 (days 60-90, optimization and launch): test with real VINs (anonymized in logs); add monitoring for latency and error rate on the "by VIN" endpoints; document the fallback for cases where the VIN has no match in the catalog.

FAQ: frequently asked questions about identifying car parts by VIN with TecDoc

Is the WSDL operation actually called "SearchByVIN"?

No, not in the public Pegasus 3.0 contract we verified for this article. VIN-based identification is done through the operations getVehicleDataByVINExt, getVehiclesByVIN, getOEArticlesByVIN, and getPartsByVINExt. "SearchByVIN" is a generic term, often used in documentation and articles to describe the feature, not its exact technical name.

Can I use VIN search without a TecDoc license?

No. All "by VIN" operations require an active TecAlliance license and authorized access to the webservice. Without a license, calls to these operations will not work, regardless of how correctly the code is implemented.

WSDL/SOAP or REST API: which should I choose for a new store?

For new projects with no prior TecDoc integration, the REST/JSON option may be easier to integrate with a modern web stack, if your license includes it. For projects continuing an existing Pegasus 3.0 integration, you usually stay on WSDL/SOAP, for technical and contractual consistency.

How accurate is VIN-based part identification?

Identifying a vehicle by VIN is generally more accurate than manual make/model/engine selection, because it removes ambiguity between close variants. However, the final accuracy of the parts list still depends on the quality of the data manufacturers enter in the TecDoc catalog and on how specific the query sent to the webservice is.

What if a customer's VIN is not found in TecDoc?

Handle this case explicitly in the interface: show a clear message and offer the alternative of a manual search by make, model, engine, and year. Do not let the flow stall on an unedited technical error for the end user.

What data am I allowed to store locally from a VIN search result?

This depends strictly on your active TecAlliance contract/license. Some licenses allow only temporary caching, others allow extended storage of certain data categories. Always verify the contract terms before deciding on your storage architecture.

Conclusion: from VIN to the correct part, without technical guesswork

Identifying a car part by VIN with the TecDoc API works through four real operations in the Pegasus 3.0 WSDL contract - getVehicleDataByVINExt, getVehiclesByVIN, getOEArticlesByVIN, and getPartsByVINExt - not through a single generic "SearchByVIN" operation. For a Laravel/PHP store, a correct implementation means a dedicated service, VIN validation, explicit SOAP error handling, and a clear mapping of the received fields into your database.

If you are preparing or optimizing your TecDoc integration and want to avoid the technical assumptions that cost time in production, the HappyWeb team can review the WSDL contract with you and build the VIN search flow from scratch.

Want to add VIN-based search to your auto parts store? Contact us for a consultation.

We build Laravel applications with TecDoc integration. See our portfolio.

Sources

Pegasus 3.0 WSDL contract (TecAlliance), endpoint TecdocToCatDLB.soapEndpoint?wsdl - inspected directly; operations getVehicleDataByVINExt, getVehiclesByVIN, getOEArticlesByVIN, and getPartsByVINExt confirmed (verified 2026-06-22).
TecAlliance API documentation (REST/JSON generation): developer.tecalliance.cn - confirms the existence of VIN Search endpoints in the REST variant (verified 2026-06-22).
Official TecDoc site: https://www.tecdoc.net/ - reference source for the catalog and the TecAlliance brand; full content verification was not possible at the time of writing (temporary access issue, 2026-06-22); we used the WSDL contract above for technical confirmation.
TecAlliance portal: tecalliance.net (redirected from tecalliance.services) - confirms the lack of public pricing and the need to contact TecAlliance directly for licensing (verified 2026-06-22).
Note: the exact names of the authentication fields and the XSD parameters of the "by VIN" operations must be confirmed in your own WSDL contract from TecAlliance; the SOAP examples in this article are simplified and anonymized, for illustration only.

Image generated with AI, used for illustrative purposes.

Identifying Car Parts by VIN with the TecDoc API: a Technical WSDL Guide (SearchByVIN)