Finding the Radio S/N for Chrysler
The initial step is to find the radio's serial number.
Depending on the radio unit installed in your 2023 300, the S/N can be found either through the screen menu or by checking the label on the radio itself.
Follow the steps below to identify your serial the right way.
Which Head Unit Is in Your 2023 Chrysler 300?
2023 was the final model year of the Chrysler 300 - production ended at the Brampton Ontario Assembly Plant on December 8, 2023, with the limited 300C 6.4L HEMI special edition closing out the nameplate. The radio range still uses the Uconnect 4 family with three head units, separated by screen size and built-in navigation.
Uconnect 4 (UAG) is the 7-inch non-NAV touchscreen, standard on the entry 300 Touring. Visual ID: 7-inch display centred in the dash bezel opening with trim filling the surround; Apple CarPlay and Android Auto are supported, but there is no factory NAV or Map tile on the home screen.
Uconnect 4C (UAS) is the 8.4-inch non-NAV touchscreen. Common on 300S and Touring L without the navigation upgrade. Visual ID: 8.4-inch screen filling the bezel opening, CarPlay and Android Auto present, but no Map/NAV tile because GPS navigation is not built in.
Uconnect 4C NAV (UAQ) is the 8.4-inch touchscreen with built-in GPS, standard on the 2023 300C 6.4L HEMI special edition (limited to 2,000 US / 200 Canada units) and on 300S Premium. Visual ID: identical 8.4-inch bezel and glass to UAS, but the home screen carries a dedicated NAV/Map tile and on-board maps work without a phone.
Field test: 7-inch = UAG, 8.4-inch with no Map tile = UAS, 8.4-inch with a Map tile = UAQ.
Check the Display First - Serial Retrieval Without Tools
Try the following for your 2023 Chrysler 300:
The 2023 Chrysler 300 — the final generation of Chrysler's full-size rear-wheel-drive sedan — is equipped with the Uconnect 4C (RA4) with an 8.4" touchscreen. Dealer Mode uses a different method from older RA3 models: press the bottom-left and bottom-right corners of the physical screen bezel frame simultaneously for 5 seconds (ignition ACC or ON). Dealer Mode opens. Navigate to: System Info → Radio Part Info → Serial Number.
Find Your Serial Number on the Radio Display
The 2023 Chrysler 300 - the final model year of the LX-platform car - keeps the Uconnect 4 line-up: 8.4-inch UAQ NAV, 8.4-inch UAS non-NAV, and the smaller 7-inch UAG. The radio serial number can usually be read on screen via the hidden dealer/diagnostic menu, although the latest Uconnect software builds have restricted dealer-mode access on some cars.
Uconnect 4C 8.4 (UAQ / UAS)
Switch the ignition to RUN/ACC and wait for the Uconnect interface to finish booting. Press and hold the driver-side temperature UP, the driver-side temperature DOWN, and the front DEFROST buttons together for roughly 5-10 seconds. If the climate-button shortcut does nothing on a software-updated unit, press and hold the bottom-left and bottom-right corners of the screen at the same time for about 5-10 seconds. Browse to the radio/system info section to view the 14-character serial number on screen, then photograph the screen so each character can be copied without typos.
Uconnect 4 7-inch (UAG)
Place the ignition in RUN/ACC and let the screen finish loading. Press and hold both temperature UP and temperature DOWN buttons together for around 5-10 seconds to enter the engineering menu. Open System Info / Target Main Data and read the serial number on screen, then snap a photo of the display before transcribing the digits.
300's Hardware Label Method
If the serial number cannot be accessed on-screen, use the pull-out method.
Most Chrysler 300 factory radios include a sticker with the serial number printed on the casing.
Steps:
- Switch off the vehicle.
- Detach the bezel surrounding the radio.
- Unscrew the clips.
- Slide the unit forward to access the label.
The serial number is usually located near the barcode.
If Dealer Mode is unavailable on the 2023 Chrysler 300, remove the RA4 unit from the 300's center stack. The bezel corner press can be blocked after OTA firmware updates.
- Pry off the bezel panel with a plastic trim tool.
- Remove the four Phillips mounting screws.
- Slide the unit forward to read the serial label on the side or back of the chassis.
Taking Out the Radio to View the S/N on the Tag
If dealer mode has been restricted on the 2023 Chrysler 300 by a Uconnect software update, the printed chassis label remains the next reliable source. The Uconnect 4 head unit on the LD-platform 300 sits in a centre stack closely tied to the climate cluster, so methodical removal is important.
Safety first. Turn the ignition off, take out the key, disconnect the negative battery terminal, and wait a few minutes before touching wiring. Never disturb the yellow airbag/SRS connectors and use plastic trim tools so nothing shorts or breaks.
Tools you will need. Plastic trim removal kit (a Mopar C-4755 trim stick or equivalent), Phillips and small Torx bit set, 7mm/10mm socket set, flashlight.
Removal overview. Pry the centre instrument panel bezel free with a plastic trim tool starting at the bottom edge and working up the sides; on the LD 300 the bezel carries the A/C-heater control and clock connectors, so keep finger pressure even. Unplug those harnesses at the rear of the bezel before laying it on a clean cloth. Remove the mounting fasteners (typically four screws, two upper and two lower) holding the radio cage to the support bracket. Slide the radio rearward and disconnect the antenna lead and the multi-pin power/data harness on the back.
Where the serial sits. The serial number is printed on a barcode/sticker label on the top or side of the radio chassis, next to the part number and supplier markings.
Tips. Photograph the label and double-check ambiguous characters such as 0/O, 1/I and B/8 before submitting the serial. If working around airbag wiring or the integrated climate cluster is uncomfortable, have a professional installer remove the unit for you.
Example: Chrysler 300 serial number label location
Typical Radio Serial Prefixes and Formats
Year Chrysler 300 RA4 serial formats:
T00AM– Harman RA4 Uconnect 4C (primary format on the 300)T00BE– Continental variant
Serial is 14 alphanumeric characters. Ignore the part number (starts with P or 68).
What a Valid Serial Number Looks Like
The factory radios on the 2023 Chrysler 300 use the standard Mopar/Uconnect serial style, with the exact prefix depending on the Uconnect tier and the supplier (Visteon, Continental, Harman or Panasonic) that built the unit.
Uconnect 4C 8.4 (UAQ / UAS)
Typically printed as a 14-character alphanumeric string on the chassis label. It commonly begins with T - frequent prefixes include T00AM, TM9 and TQ1 - or with A2C on Continental-built variants. The serial is usually a continuous run of letters and digits with no dashes or spaces.
Uconnect 4 7-inch (UAG)
The 7-inch UAG unit usually carries a Mopar/Harman or Panasonic-style serial on the chassis sticker; the label on the unit itself is the authoritative reference. Always copy the serial exactly as printed and avoid guessing characters that look unclear.
How to Get Your 2023 Chrysler 300 Radio Code
Vehicle radios use security codes tied to the radio unit itself rather than the model or production year.
- Our lookup service works by matching your Chrysler 300 radio's serial number.
- When you input the serial into the generator, the system identifies the radio unit and retrieves the corresponding code.
- Simply input the digits into the 300 stereo.
- Compared to Chrysler dealer retrieval, this method is faster and more convenient.
Code Entry Process for 2023 300
Now that you've generated 2023 Chrysler 300 radio code from the S/N, you're ready to reactivate the radio.
Some drivers get stuck at this stage because input process can look different across radio versions, but it's usually quick.
When the radio shows dashed lines, it means the unit is waiting for the correct numbers.
Step-by-Step - Correct Entering Process
To enter the code on the 2023 Chrysler 300 Uconnect 4C:
- Turn ignition to ON. Screen shows "ENTER CODE".
- Tap each digit of your 4-digit code on the touchscreen keypad.
- Radio unlocks after the 4th digit. No confirm button needed.
3 wrong attempts trigger a 60-minute lockout. Keep ignition ON. Turning off restarts the timer.
In-depth Entering Instructions for Chrysler 300 2023
Once the unlock code has been retrieved for a 2023 Chrysler 300 Uconnect head unit, it can be entered directly at the dash - no scan tool or dealer visit required.
Limited attempts. Mopar/Uconnect head units only accept three incorrect tries before the radio enters a WAIT state, so confirm every digit before pressing it.
Entering the code. Place the ignition in RUN/ACC so the radio powers up but the engine stays off. Wait for the display to show CODE, Please enter Anti-Theft Code, or a similar prompt. On the Uconnect 4C 8.4 (UAQ/UAS), tap the on-screen number pad and confirm with the OK/Enter touch button. On the Uconnect 4 7-inch (UAG), press the numbered preset buttons in sequence (preset 1 = first digit, preset 2 = second, etc.) - or use the on-screen keypad when the unit prompts for it.
If a wrong code was entered. If WAIT appears after incorrect attempts, leave the radio powered with the ignition in RUN for a continuous 30 minutes (the vehicle may be driven during this time) before trying the correct code again.
Fixing Common Code Entry Problems for 2023 300
If the 300 screen boots normally, anti-theft is inactive. Force the prompt: briefly pull the radio fuse, reconnect, turn ignition to ON.
The 300 RA4 label carries both serial and part number. Serial: 14 chars starting with T00AM or T00BE. Part number (skip): starts with P or 68.
If Dealer Mode was used, verify against the physical label. Screen glare on the 8.4" can cause misreads. Contact support for a free re-check if needed.
3 wrong entries lock the 300 RA4 for 60 minutes. Keep ignition in ON or ACC. Turning off restarts the timer from zero.
On the 300 RA4 label: serial = 14 alphanumeric chars starting with T00AM or T00BE. Part number starts with P or 68 — not the serial.
The 300 Uconnect 4C uses touchscreen-only code entry. Tap each digit directly on the on-screen keypad. No physical buttons needed. Auto-unlocks after the 4th digit.
Why Did the Radio Lock and Ask for a Code?
The 2023 Chrysler 300 RA4 self-locks after power is cut. The final-gen 300 uses the same anti-theft system — a disconnected radio is useless without the code.
Typical cause: battery replacement or disconnect. Other causes:
- Failed fuse after electrical work
- Buying the 300 used without a known code
- Battery disconnect during service
- Battery drained from not driving
Code is derived from the radio serial number — not the VIN.