Where to Find the Serial Number on your Odyssey
Very useful thing to know is that factory radios use a specific S/N to identify each unit.
Your security system matches the code directly to this serial.
Unlike car-specific data like VIN or registration information, it is not determined by the model or production year, so you'll be able to retrieve it even if you have an aftermarket radio.
Depending on the manufacturer and radio installed in your Honda Odyssey, the retrieval method is different.
These are the best ways to locate it.
Factory Radios on the 2007 Honda Odyssey
The 2007 Odyssey is a mid-cycle year of the 3rd-generation RL3/RL4 platform and continues the same factory audio family used since 2005. The unit fitted to your van depends on trim, and the trim badge on the tailgate is still the most reliable initial guide.
The LX trim carries an AM/FM single-disc CD player with four speakers and 120 watts of factory output - no XM pre-wiring and no in-dash CD changer. The EX and EX-L trims share the most common 3rd-gen Odyssey radio, an AM/FM unit with a 6-disc in-dash CD changer, six speakers, 120 watts and XM-ready wiring on EX-L from the factory; this radio is supplied by Alpine or Panasonic with Honda part numbers in the 39100-SHJ-. family. The Touring trim adds the DVD-based Honda Satellite-Linked Navigation System - a colour touchscreen head unit in the dash combined with a DVD-based navigation computer mounted under the driver's seat, with a 360-watt premium amplifier and seven speakers including a subwoofer. A roof-mounted flip-down rear-seat DVD entertainment screen is available on EX-L and standard on Touring.
To identify yours quickly, look at the front fascia: a single CD slot in the centre and no XM badge points to the LX-grade single-CD unit; a wider CD slot with a 1-6 disc indicator on the display points to the EX/EX-L 6-disc in-dash changer; and a colour touchscreen with a separate NAVI or MAP button cluster points to the Touring DVD-based navigation head unit. All three units carry the Honda anti-theft system and will display CODE or Err after a battery disconnect, requiring the original factory code (5 digits for the audio side, 4 digits for the navigation side on Touring) to come back online.
Find the Serial on the Radio Screen
The method for 2007 Honda Odyssey is this:
The 2007 Honda Odyssey uses a double-DIN head unit with a dot-matrix screen. The serial number can be displayed using the preset button method:
- Turn ignition to ON or ACC. The radio shows "CODE" or "ENTER CODE".
- Press and hold buttons 1 and 6 at the same time for 3-5 seconds.
- The display cycles through the serial number in two segments: first half (e.g.,
U3210) then second half (e.g.,L0482).
Note: On some 2007 Odyssey radios with navigation, the serial may show up in the Settings → System Information menu. Check this first if your model has a touchscreen unit.
On-Screen Serial Retrieval - 2007 Odyssey
For 2007 Odyssey factory CD and 6-disc head units, the documented dealer-mode shortcut is to read the radio serial straight from the unit's own display using preset buttons 1 and 6 together with the power button. This avoids any dash disassembly when it works.
To run the shortcut, turn the ignition to the ACC or ON position so the radio is fully powered, then switch the radio off using the power button so the display goes dark. Press and hold preset buttons 1 and 6 at the same time, then while still holding 1 and 6 press the power button. Keep all three buttons held for several seconds. The display will toggle between two screens - one showing U followed by the first four characters of the serial, the other showing L followed by the last four. The two halves combined form the eight-character serial number.
Touring navigation system note
The Touring DVD-based navigation head unit does not always respond to the 1+6+power shortcut on the audio side. To read the navigation system's separate serial, slide the driver's seat fully forward and up, look at the rear face of the navigation computer mounted under the seat, and copy the printed serial from the sticker.
If the shortcut does not work
Confirm the radio is fully off (display dark) before pressing 1+6+power, not muted with the display still on. If there is no response after several attempts, fall back to physically removing the head unit and reading the serial from the chassis label.
Locate Serial on Odyssey's Radio Chassis
If the serial number cannot be accessed via display, use the hardware method.
Most Honda Odyssey OEM radios include a label with the serial number printed on the chassis.
Step-by-Step Approach:
- Switch off the vehicle.
- Lift the trim surrounding the radio.
- Loosen the mounting bolts.
- Slide the unit forward to access the label.
The serial number is usually located near the printed code.
If the button method fails to display the serial on your 2007 Honda Odyssey:
- Switch off the vehicle.
- Pry off the center stack trim with a plastic pry tool. The 2007 Odyssey's larger radio sits within a bezel held by snap clips.
- Unscrew the four Phillips-head screws holding the radio in the bracket.
- Slide the unit out to access the serial label on the radio housing.
Note: The 2007 Odyssey's double-DIN radio weighs more than single-DIN units. Support it firmly when extracting it.
Radio Removal on the 2007 Honda Odyssey
If the on-screen 1+6+power shortcut does not display the serial, and the dash sticker, owner's wallet card and glove box label are not available, the next step is to remove the head unit and read the serial directly from the chassis label. The 3rd-gen Odyssey dash bezel is held by retaining clips with four bolts on the radio itself, so the procedure is mechanically simple but should be done with care because of the SRS airbag wiring near the dash.
Safety first
Turn the ignition fully off and remove the key from the cylinder. Disconnect the negative terminal of the 12V battery and wait at least three minutes before working near the dash so the SRS airbag capacitor can fully discharge. Stay clear of any yellow airbag connectors while the trim is loose.
Tools you will need
A flathead screwdriver to start the upper-glovebox dash-clip release, plastic trim/panel pry tools to walk around the bezel without scratching the dash, a Phillips screwdriver or 8mm/10mm socket for the four radio retaining bolts (depending on Honda's batch), masking tape on screwdriver tips to protect the surrounding dash plastics, and a phone or camera to photograph the chassis label once the radio is out. Note that 3rd-gen Odyssey factory radios are bolted in, not held by spring DIN clips, so Honda H3 / DIN release keys are not normally required for this generation.
Removal overview
Open the upper glovebox and find the small slot on the side of the pop-off centre dash panel. Insert a flathead screwdriver into the slot and pry up the first clip in the upper right-hand corner of the bezel, then walk the pry tool around the perimeter, releasing each clip in turn until the bezel comes free. Disconnect any wiring still attached to the bezel (for example the hazard switch) and set the bezel aside. Remove the four bolts holding the radio to the dash sub-frame, then slide the head unit forward and unplug the wiring harness, antenna lead and any fibre/data connectors from the rear of the unit.
Where the serial is printed
The serial is on a white or silver thermal-printed label on the metal chassis - usually on the top, side or rear face. The label carries a Honda part number (for example 39100-SHJ-..) and a separate serial number; the serial is the longest alphanumeric string and is the one tied to the barcode.
Touring navigation
The DVD-based navigation computer on the Touring trim is mounted under the driver's seat, not behind the dash. To read its serial, slide the driver's seat all the way forward and up, look at the back of the navigation unit and copy the printed serial from the sticker.
Example: Honda Odyssey serial number label location
What a Valid Serial Number Looks Like
The 2007 Honda Odyssey radio serial number follows the standard Honda OEM format:
U1234L5678– Standard Honda factory format – two halves displayed separately (U####thenL####), combined into a 10-character serial
Radio manufacturers for the 2007 Odyssey: Alpine (most common) or Panasonic. Nav models could use a separate module but usually use the same U/L two-part serial format.
Reminder Write down the complete serial exactly – even one wrong digit will generate an incorrect code.
Common Serial Number Formats on 2007 Odyssey Head Units
Factory 2007 Odyssey head units carry a printed serial number on the chassis label rather than a moulded-in code. On 3rd-gen Odyssey CD and 6-disc units the serial is typically presented in two halves (U and L) on the unit's own display when 1+6+power is held.
The serial is an 8-character alphanumeric string with a single-letter prefix on the chassis label. Common Honda audio prefixes seen on this generation include U (often reported on Alpine-supplied units) and M on some Panasonic builds; the remaining seven characters are digits or letters. When read from the on-screen dealer-mode shortcut, the same serial appears split across two screens - U followed by the first four characters, then L followed by the last four characters. The U and L are screen labels, not part of the serial; the full serial is the eight characters from the two halves combined. The chassis label also lists a Honda part number such as 39100-SHJ-A100 or 39100-SHJ-A400 with a face code like 1BU1 - this is not the serial and should not be entered into a code lookup tool.
When copying the serial, take the longest alphanumeric string next to the barcode (or combine the on-screen U and L halves into a single eight-character string), and double-check ambiguous characters such as O vs 0 and I vs 1 by comparing the printed string with the barcode. The DVD-based navigation computer under the driver's seat on the Touring trim carries its own separate serial number, used for the 4-digit navigation PIN, distinct from the 5-digit audio code.
How to Get Your 2007 Honda Odyssey Radio Code
Vehicle radios use anti-theft codes tied to the radio unit itself rather than the model or production year.
- The system uses the Odyssey's radio serial to retrieve the unlock code.
- Once the serial number is submitted, the system identifies the radio family and generates the code that you need.
- You can then enter the code directly into your Honda radio.
- Compared to Honda dealer retrieval, this method is faster and more convenient.
Final Step - Enter the Radio Code
After receiving 2007 Honda Odyssey radio code from the serial, you're ready to reactivate the radio.
Many drivers hesitate at this stage because input process can look different across radio versions, but it's usually simple.
When the radio shows dashed lines, it means the unit is waiting for the correct numbers.
Entering Process
To type in the code on the 2007 Honda Odyssey's radio:
- Ignition ON. Radio displays "CODE".
- Use preset buttons 1-5 to enter each digit of the 5-digit unlock code. Each button rotates through digits 0-9.
- Press and hold button 6 for a few seconds to accept.
Lockout: 3 wrong attempts = 60-minute lockout. Keep ignition ON the entire time. Turning off the ignition restarts the lockout timer.
Entering the 5-Digit Code on the 2007 Odyssey
Once you have the correct 5-digit anti-theft code for your 2007 Odyssey radio, the entry process is fast, but you have a strict attempt limit before the radio locks itself out, so verify the code before you start. The Touring trim's navigation system uses a separate 4-digit code entered on the touchscreen.
Limited Attempt Warning
You typically have around 10 attempts before the radio enters a lockout state. After roughly ten consecutive wrong codes, the factory Honda radio of this era displays Err or E and refuses further input until the lockout clears. Some units can be cleared by leaving the ignition in the ACC/ON position for one continuous hour and then trying the correct code; others may need to be reset by a Honda dealer or via Honda's official online radio code lookup. Cycling the key off does not always shortcut the timer, so do not hammer guesses at the unit.
Entering the audio code
Turn the ignition to the ACC or ON position so the radio powers up and shows the CODE prompt. Enter the code digit by digit, pressing the preset whose number matches each digit once - for 41352 that is preset 4, 1, 3, 5 and 2. A correct code is normally accepted as soon as the fifth digit is in, with no hold or knob turn to confirm. When accepted, the radio returns to its normal AM/FM display and audio resumes.
Touring navigation code
The DVD-based navigation system on the Touring trim asks for a separate 4-digit code on the touchscreen at first power-up. Tap the digits on screen in order, then press Enter or OK to confirm.
If it does not unlock
Stop after the second wrong attempt and re-verify the serial number you used to obtain the code, making sure no leading letter or trailing digit was dropped.
Why Is the Radio Asking for a Code?
Mid-era Honda radios have the same anti-theft system as earlier models: any interruption in battery power activates the code prompt on the next startup. Common causes include:
- Battery replacement or disconnect — by far the most common cause.
- Battery drain — a completely discharged battery also activates the lock.
- Fuse replacement — replacing the radio fuse can momentarily cut power and trigger the lock.
- Workshop electrical work — repairs that requires disconnecting power will produce this.
Using the correct code deactivates the lock and normal function is restored immediately. The lock only comes back if power is cut once more.
Fixing Common Code Entry Problems for 2007 Odyssey
After 3 wrong attempts, the mid-era Honda radio enters lockout mode and displays an error or goes silent. To exit it:
- Leave the ignition in the ON position — don't switch it off.
- Allow the full 60 minutes to elapse. Switching off at any point resets the waiting period.
- Once 60 minutes have passed, the radio will display "CODE" again.
Navigation-equipped 2007 Odyssey units follow the same 60-minute lockout procedure. If the unit still won't accept codes after waiting, the unit may need a dealer diagnostic.
The double-DIN Honda radio uses an identical button layout as the older single-DIN platform:
- Preset buttons 1–5 — press each cycles through digits 0–9 to select that digit of the code.
- Button 6 — hold for several seconds to confirm the full code.
On certain 2007 Odyssey navigation-equipped radios, the preset buttons may be labeled differently or supplemented by soft keys. In those cases, the confirmation button is typically the rightmost preset or a dedicated ENTER key.
An incorrect code result on the double-DIN Honda is almost always traced back to a misread serial. The serial label on the radio housing shows both the serial and the part number — confirm you copied the serial (U####L####) and not the part number.
If the code was rejected after one attempt, do not entering more guesses — there are only 3 tries before a 60-minute lockout. Contact support with the serial for a no-charge reverification before retrying.
The serial number format for the double-DIN Honda radio is one of:
U####L####— the standard two-part Honda serial (first half starts with U, second with L).HBM####— found on navigation and some premium units.913A####— used by Alpine-manufactured units.
The part number printed alongside begin with 39100 or 39101 — do not use those. When in doubt, use the 1+6 button method to display the serial on the screen itself.
When the head unit powers on but skips the "CODE" screen, consider these possibilities:
- The unit might be unlocked — try normal operation first.
- Certain 2007 Odyssey radios show "ENTER CODE" rather than just "CODE" — either message means the same thing.
- With navigation models: the nav screen may come up first the code screen. Wait a few seconds for the audio system to initialize separately.
If no prompt ever show, verify the radio fuse — a failed radio fuse will prevent the unit from powering on.