Honda Standard Radio
Get your serial from the screen
Turn on the ignition and radio. Press and hold preset buttons 1 and 6 simultaneously for about two seconds until the display changes. The serial will either appear as two parts, a U number and an L number (for example, U2154 L2135), or as a single S/N number (for example, S/N 2602353). Enter whichever format appears on your screen.
Honda Navigation (2003+)
Get your serial from the screen
With the radio on, press and hold SEEK or SKIP together with CH or DISC simultaneously, then press PWR/VOL. The serial number will appear on screen.
Note it down exactly as shown.
Honda DVD Navigation
Find your serial via the diagnostics menu
Fitted to some Accord, Civic, CR-V, Jazz and Legend models pre 2012. With the ignition on, press and hold Map (or Guide), Menu and Cancel together for a few seconds until the diagnostics screen appears. Select Unit Check then Navi ECU and your serial number will be displayed.