Volkswagen

Volkswagen from 1981 to 2024: exchange or rebuild of your own unit — what makes the difference depends on the part and the model

Across a Volkswagen range as broad as this — from the Polo to the Amarok, from the Corrado to the Arteon, spanning the 1980s through to 2024 — the choice of sales method depends first and foremost on the part itself, its availability on an exchange basis, and the condition of the original unit. For a common gearbox or engine (Golf, Transporter, Touran, Passat), exchange will cover the vast majority of cases. For a rare or out-of-series part, or one carrying a reference that is difficult to source as a reconditioned unit — certain transfer cases, some Scirocco or Corrado blocks, or specific engines such as the 2.9 VR6 or the 5.0 TDI — rebuilding your own unit may be the only realistic option: the part is returned to its owner after reconditioning, which avoids any reference-matching issues.

Gearboxes, engines and turbos: three families with very different identification logic

Gearboxes are by far the most represented family in this collection. The range covers 4-, 5- and 6-speed manual transmissions, DSG 6 and DSG 7 — the latter sold with a new dual-clutch, without mechatronic unit — as well as a Shiftmatic. On the Golf, Polo or Caddy, the same engine capacity can correspond to several different gearbox references depending on the year of production and the exact engine code: engine capacity alone is not enough to identify the correct part. Turbos, available new or reconditioned, cover a spectrum ranging from the small 1.4 TDI units (codes AMF, BAY, BNM) through to the 2.5 TDI units found in the Transporter and Crafter, with distinct manufacturer references according to output — 88, 102, 130, 163 or 174 hp for the 2.5 TDI family. Engines are supplied as bare units.

Engine codes: the essential starting point for multi-variant engines

The Volkswagen catalogue features numerous variants sharing the same engine capacity: the 1.9 TDI family alone spans power outputs from 68 to 150 hp, each associated with specific engine codes (ABL, AGR, ALH, AFN, ASV, AJM, AUY, BKC, BLS, BXE, ARL, among others). The 2.5 TDI in the Transporter and Crafter follows the same logic: codes ACV, AJT, ALX, AXD, AXE, BNZ, BPC denote different power outputs and applications. On more recent generations — the 1.4 TSI hybrid in the Golf GTE (CNLA, CRJA, CUKB), the 1.5 TSI (DADA, DFYA) or the 2.0 TSI R 300/310 (CJXB, CJXC, DJHA) — the engine code stamped on the block remains the only reliable reference for avoiding an ordering error.