ETKA Explained: The VW Group Parts Catalog

What ETKA covers

ETKA spans the whole VW Group line-up, mapping each vehicle to its exact build by VIN:

• Volkswagen: Golf, Passat, Polo, Tiguan, Transporter and the rest
• Audi: A3, A4, A6, Q5, Q7 and the full range
• Škoda: Octavia, Fabia, Superb, Kodiaq
• SEAT and Cupra: Leon, Ibiza, Ateca, Formentor

The shared-platform trap

VW Group brands share platforms heavily. A Golf, an A3, an Octavia and a Leon can sit on the same MQB architecture and share many components, but with build-specific differences in engine, trim and market. That overlap is convenient on the production line and dangerous at the counter: a part that "fits a Golf" may not fit the specific Golf in front of you.

ETKA resolves the VIN to the precise variant, so you order the part that actually fits rather than a generic family match. This is where it earns its keep over a quick web search.

Reading a VW Group part number

ETKA numbers are among the most readable in the industry, and learning the structure pays for itself within a week. A number such as 1K0 615 301 AB has four blocks, each carrying real information.

The first three characters are the car line. 1K0 is the Golf Mk5 family, 8K0 is the B8 A4, 5Q0 is the MQB generation used across several brands. A leading digit with a letter, such as 06A or 03L, usually marks an engine-line number rather than a body one.

The middle three digits are the main assembly group, and they are constant across the entire group: 615 is brakes, 407 is front suspension and driveshafts, 199 is engine mounts, 819 is heating and ventilation. The third block identifies the part inside that group, and the trailing letters are the revision index, stepping A, B, then AB as the part is updated.

Two consequences follow. A number ending in different index letters is the same part at a different revision, and usually the later one supersedes the earlier. A number whose middle block does not match the group you are working in is the wrong part, no matter how plausible the rest looks.

Supersessions across long lifecycles

Group models run for many years with rolling changes, so supersession chains here get long. It is common to follow a number through three or four revisions before reaching the current part, and the endpoint is occasionally a kit that replaces several components sold separately in the original design.

This is the single strongest argument for reading the live catalog rather than an old parts list or a cached third-party copy. A number that was correct when a printed list was made can be two revisions out of date, and the superseded design is often exactly the one that was failing in service. A current ETKA follows the chain to today.

Where the group data is unusually strong

Two things make ETKA valuable beyond simple lookup. The first is fastener and small-part coverage: clips, seals, grommets and single-use bolts are drawn and numbered on the diagrams rather than left to guesswork, which is exactly the class of part that stalls a job at four in the afternoon.

The second is the option-code layer. VW Group cars carry a PR code list on the vehicle sticker, and those codes decide brake package, suspension variant, gearbox and dozens of equipment items. When two parts look identical in the diagram, the PR code is usually what separates them, and the catalog uses it alongside the VIN to make the call.

Accessing ETKA online

Traditionally ETKA was installed dealer software, tied to a machine and an account. Through VINsearch the same data opens in the browser, with no installation and no dealer credentials, alongside the rest of the 53 catalogs — how ETKA online works walks through it.

For a mixed-make shop that is the practical point: VW Group precision without a dedicated dealer terminal sitting in the corner, and without a second subscription for the Ford and Toyota that come through the door the same afternoon.

Where to go next

For the working routine — VIN in, exploded diagram, callout, supersession chain — see how to use ETKA step by step and ETKA lookup by VIN. If your question is whether a particular badge is in ETKA at all — BMW, Mercedes and Renault are the usual guesses, and the answer is no — which brands ETKA covers settles it marque by marque.

The main groups, and why they are worth memorising

The middle three digits of a VAG number name the assembly group, and that numbering is constant across every model and every marque in the group. 100 is the engine short block, 121 cooling, 129 air intake, 130 fuel, 199 mounts, 253 exhaust, 407 front suspension and driveshafts, 505 rear axle, 611 brake hydraulics, 615 brakes, 803 body floor, 819 heating and ventilation, 907 control units, 971 wiring looms.

Learn a dozen of those and catalog navigation stops being a search problem. You go to the group, then to the diagram, and the part is where it should be — which is faster and far more reliable than typing a part name and sorting through what comes back.

Reading the data sticker

Every VAG car carries a data sticker, usually in the spare-wheel well or on the boot floor, and repeated in the service booklet. It lists the vehicle type code, the paint and interior codes, and the PR code block — three-character codes for every factory option that affects the parts list.

The PR block is what settles ambiguity. When ETKA offers two brake variants for one VIN, the difference is a PR code, and the sticker says which one this car has. Photographing that sticker when a car comes in saves a second trip to the workshop later.