Reconditioned Audi A3 1.6 TDI Gearbox

A3 1.6 TDI from 2009 to 2020: before and after the generation refresh, the available gearbox depends as much on the engine code as on the year of first registration

Over this eleven-year span, the A3's 1.6 TDI was paired with three different transmissions — 5-speed manual, 6-speed manual and DSG 7 — and three distinct engine codes: CAYC, CLHA and CRKB. The code stamped on the engine block is the primary identification criterion here: the same engine capacity may be fitted with either a manual gearbox or a DSG 7 depending on the code-generation combination, and these parts are not interchangeable.

Exchange or rebuild: when the second option makes sense

Rebuilding your own gearbox is worth considering mainly when the exact reference matching your engine code is scarce on the reconditioned second-hand market, or when the history of the original unit is known and deemed favourable. For the DSG 7 in particular — sold without the mechatronic unit — having your own base unit to hand can simplify identification and avoid any reference confusion between the CAYC, CLHA and CRKB families. For the 5- and 6-speed manuals, it is often immediate availability that steers the choice towards exchange.