Turbo 2.7 TDI

2.7 TDI: 9 distinct engine codes, from TD27TI to CGKB, with turbos that have nothing in common from one generation to the next

The 2.7 TDI is not a single engine that passed through the decades unchanged. This guide covers power outputs ranging from 125 hp to 190 hp, spread across engine code families that share no connection with one another: the TD27TI belongs exclusively to the 125 hp variant — an entry-level unit found on the Nissan Terrano — whilst the codes BPP, BSG, CANB and CAND cover the 163 hp and 180 hp outputs, and the codes CAMA, CAMB, CGKA and CGKB the 163 hp and 190 hp variants fitted to the Audi A4, A5 and A6. Each code family points to a different manufacturer reference: the TD27TI reference has no reason to match that of the VAG codes, and even within the VAG codes, CAMB or CGKB may not share the same reference as CAMA or CGKA.

Why power output alone is not enough to identify the turbo

The same stated output — 163 hp, for example — can correspond to several distinct engine codes depending on the vehicle's generation. The codes BPP and BSG on one side, CANB and CAND on the other, all appear under the same 163 hp / 180 hp entry in this guide: this means they share an entry but not necessarily an identical reference. Before placing any order, it is the engine code stamped on the block that takes precedence, never the power output alone or the vehicle model. On the Audi A6 2.7 TDI as on the A4, two examples from the same model year can carry different codes depending on specification or market.

Causes of failure and precautions when replacing

On this type of variable-geometry diesel engine, turbo failures typically manifest as abnormal whistling, persistent blue smoke, or the vehicle entering limp mode. The most common causes remain lubrication breakdown — old oil or a partially blocked circuit — and progressive fouling linked to a faulty diesel particulate filter or EGR valve. Fitting a new turbo without addressing the root cause will inevitably lead to another premature failure. All turbos listed here are new turbos sold on a direct-sale basis, with no old unit to return.