Reconditioned Audi Engine

13 Audi engine families, dozens of engine codes: why the same 2.0 doesn't mean a single part

Across the Audi range, the stated engine capacity alone is not enough to identify the engine you need to replace. The 2.0 TDI alone covers more than 26 distinct engine codes — from BMM to DEUA, taking in CAHA, CBDA and CUPA along the way — spread across different generations, power outputs and architectures. Two A4 2.0 TDI vehicles from the same year can carry completely incompatible engines. The code stamped on the block — also available on the registration document or via a diagnostic tool — is the only reliable identifier before placing any order.

Petrol or diesel: engine families with very different logic

On the petrol side, the range covers seven engine families: from the 1.2 TFSI (codes CBZA, CBZB, CBZC, CJZA, CJZB, fitted to the A1 and A3) through to the 2.0 TFSI with 17 referenced codes including AXX, BPY, CAEB and DJHA, via the 1.8 T 20V (AGU, AJQ, APP, APX, AUQ…) which equipped the TT and S3 generations built before 2006. The 1.4 TFSI covers six codes — notably CAXA, CAXC, CZDA and CAVG — and is found on the A1, A3 and Q3 depending on the model year. On the diesel side, the 2.0 TDI dominates the catalogue by a wide margin, but the 1.9 TDI (AVF, BRU, BSW, BXJ…) remains present on the A3 and A4 up to the mid-2000s, while the 3.0 TDI (CRTE, CVUB) covers the Q5, Q7 and A6 at the top of the range.

Eleven models covered, from the A1 to the Q7: pitfalls to avoid by model

The A3 accounts for the majority of available references across all engine families, from the early 1.6 versions (BGU, BSE, BSF) to the most recent 2.0 TDI and TFSI units. The A4 and A6 take blocks specific to their generation: the same code may appear on both the A4 and A6 but with different ancillary components — the bare engine supplied is identical; the ancillaries are not. On the TT and S3, the high-performance 1.8 T 20V and 2.0 TFSI versions (APP, APX for the TT 225 hp; AXX, BWA for the S3 8P) cannot be substituted with codes from a neighbouring engine family. The range spans vehicles produced between 1996 and 2020: the year of production, cross-referenced with the engine code, remains the essential filter to avoid any errors. All available reconditioned engines are supplied as bare engines, without ancillary components.