Octavia 2.0tdi engine swap - DTTA in DSUS car?

Hi everyone,

Has anyone fitted a DTTA 110 kW long block in place of a DSUD 85 kW in an Octavia Mk4?

My car is a 2021 Octavia Mk4 2.0 TDI DSUD with the UEV six-speed manual gearbox. The donor is a 2023 Octavia Mk4 2.0 TDI DTTA with a VCJ six-speed manual gearbox, built in November 2022.

I’d keep the DTTA long block complete, including its internals, sump and timing setup. I’d transfer the DSUD external parts, including the turbo, fuel system, intake, EGR, sensors and wiring loom. I’d also keep my original DSUD ECU and software, flywheel, clutch and UEV gearbox. The aim is to keep the car running as an 85 kW DSUD.

I compared both VINs in Partslink24. The block (05L 103 011 L), camshaft module (05L 103 044 AH) and dual-mass flywheel (05L 105 266 F) match. The catalogue also lists the same crankshaft and oil pump for both engine codes. The upper sump and timing belt have different part numbers, and I plan to leave both as fitted to the DTTA.

Has anyone done this swap or worked on both engines? I’d especially like to know whether the DSUD external parts bolt straight on and whether the original DSUD ECU runs the DTTA long block on the stock map. If you ran into any differences with the crank or cam trigger signals, engine mounts, or turbo and EGR connections, I’d appreciate the details.

Thanks!