Catalogue identity
The TuningService.uk ECU catalogue records EDC16U2.1 under Bosch EDC16 (catalogue record 4960, observed 10 November 2026). The catalogue name is an identification lead; it does not by itself prove vehicle fitment or software compatibility.
This entry is grouped with EDC16U by its catalogue name for navigation. That placement does not establish hardware or calibration equivalence.
Application evidence
Dimsport’s application list identifies EDC16U2.1 for selected Volkswagen Transporter T5 2.5 TDI 129 PS and 172 PS entries and Touran 1.9 TDI entries. It also lists the same T5 power outputs with U31 for other entries, demonstrating why vehicle and power alone are insufficient to identify the ECU.
Tuning and identification
Volkswagen SSP 304 describes the R5 TDI unit-injector system: requested injection quantity and engine speed inform start-of-injection control. The R5 example uses a different controller arrangement from the V10 example in the same document; do not assume that U2.1 alone establishes a master/slave pair.
A unit-injector system has no shared high-pressure fuel rail to tune like a common-rail engine. Match the actual ECU/software and definition; the tool list does not prove fixed U2.1 map addresses or universal differences from U31.
Read EDC16 torque fuel and tuning basics and EDC16 variant application and tuning differences for the shared context. Examples are not an exhaustive fitment list; check the installed ECU and current tool documentation.
Sources
Curated reference notes. Applicability follows the cited sources; hardware testing by this wiki is not implied.
- TuningService.uk owner ECU catalogue. TuningService.uk master ECU catalogue; administrator access required. Active Bosch EDC16 labels observed on 10 November 2026; this is a dated observation, not a live feed. Source revision Catalogue records and identifiers as observed 2026-11-10; accessed 2026-11-10.
- Dimsport: vehicle tuning application list. PDF pages 118–119, Touran and Transporter T5 U2.1 and U31 examples. Accessed 10 November 2026.
- Volkswagen Self-Study Programme 304: EDC16. R5/V10 unit-injector control and controller arrangements. Accessed 10 November 2026.