Reconditioned Audi A5 Gearbox

16 engine codes for the Audi A5: which one determines your gearbox?

On the Audi A5 (2007–2019), the reconditioned gearbox you need to order depends directly on the engine code — not simply on the stated engine capacity. This guide covers 16 distinct engine codes spread across four engine variants — 1.8 TFSI, 2.0 TFSI, 2.0 TDI and 3.0 TDI — all fitted with a 6-speed manual gearbox, but with different internal ratios and couplings depending on the exact engine block.

Diesel side: CAGA, CAHA, CGLC, CJCA, CMFA, CDUC, CKVC, CCWA and the other 2.0 TDI codes

The 2.0 TDI accounts for the bulk of the range, with engine codes such as CAGA, CAHA, CGLC, CJCA, CMFA, CDUC, CKVC — each corresponding to a specific power output or emissions standard, and therefore to a specific gearbox. The 3.0 TDI (codes CCWA, CABB, CDHB, CJEB, CJED) is fitted with a gearbox rated for a significantly higher torque output: the two diesel families share no transmission components whatsoever.

Petrol side: CDNB, CDNC, CAEB, CYRB — distinct gearboxes despite a shared engine capacity

The 1.8 TFSI (CDNB, CDNC) and the 2.0 TFSI (CAEB, CYRB) share the same turbocharged petrol architecture, yet the gearboxes paired with each differ in how they handle engine torque. Mixing up these two petrol variants will invariably result in an incorrect order. The engine code, stamped on the casing, is the only reliable criterion here — the vehicle's year and horsepower figure alone are not sufficient to identify the correct part.