Guides
Know your ECU
Practical, technician-written guides.
Guides·22 Oct 2026·6 min read
How to read hardware and software numbers from an ECU label
The hardware number, software number and manufacturer part number are the three keys to finding a compatible file. Here is where to find each one on Bosch, Delphi, Continental and Denso units.
Read guide →Guides·18 Oct 2026
Original vs. virgin vs. immo off: which file do you need?
Replacing an ECU, recovering from a bad flash or fixing a lost key each call for a different file. A quick decision guide.
Tools·14 Oct 2026
KESS, K-TAG, FLEX or Autotuner: which tool reads what?
OBD, bench and boot modes explained, plus which master tools support the most common Bosch, Delphi and Continental ECUs.
Technical·10 Oct 2026
Checksums explained: why a modified file must be corrected
Every ECU validates its software with checksums. Learn why all ECUDOCK files are delivered checksum-corrected and ready to write.