Generate Chrysler 300 2021 Radio Code With Radio S/N

Radio showing CODE? Your Chrysler 300 2021 can be unlocked quickly using the radio serial number. Enter it in the form and use the steps below if you need guidance.

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Serial Number Patterns:

Your radio serial may start with: T00AM, T00BE, TM9, T0MYD, A2C, TQN, TVPQN, T0071, T00AD

Serial Number Examples:

T0MYD164822563 (T0MYD)
T00BE351823197 (T00BE)
TM9341100221 (TM9)
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How to find Chrysler 300 2021 radio serial number

How the Code Retrieval Process Works for Chrysler 300 2021

Vehicle radios use security codes dependent on the radio unit itself rather than the vehicle model or production year.

  • The generator identifies your Chrysler radio via serial-based verification.
  • Once the serial number is submitted, the system identifies the radio unit and retrieves the corresponding code.
  • Simply input the digits into the 300 stereo.
  • The online process is quicker and more accessible than visiting the Chrysler dealer.

Code Entry Instructions

When you obtain the correct unlock code based on the serial number, you can restore default functionality by entering it into the unit.

The code entry process depends on the radio interface, but most 2021 300 systems follow a similar structure using preset buttons, touch controls, or rotary knobs - depending on if it's a factory or an aftermarket unit.

You will typically see ENTER CODE displayed on screen.

Step-by-Step Code Input Guide

To enter the code on the 2021 Chrysler 300 Uconnect 4C:

  1. Turn ignition to ON. Screen shows "ENTER CODE".
  2. Tap each digit of your 4-digit code on the touchscreen keypad.
  3. Radio auto-confirms after the 4th digit. No confirm button needed.

3 wrong attempts cause a 60-minute lockout. Keep ignition ON. Switching off restarts the timer.

The Correct Way to Enter It

Once the unlock code is in hand, the 2021 Chrysler 300 Uconnect head unit can be unlocked directly at the dash - no scan tool or dealer visit required.

  1. Limited attempts: Mopar/Uconnect head units only accept three incorrect tries before the radio drops into a WAIT state, so verify every digit before pressing it.
  2. Place the ignition in RUN/ACC so the radio powers up but the engine stays off.
  3. Wait for the display to show CODE, Please enter Anti-Theft Code, or a similar prompt.
  4. On the Uconnect 4C 8.4 (UAQ/UAS), tap the on-screen number pad and confirm with the OK/Enter touch button.
  5. 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.
  6. 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.

Can't Locate Your Unit's S/N? Follow These Steps for Chrysler 300 2021

The initial step is writing down the radio serial.

Most drivers assume the code depends on the Chrysler model or year, but in reality, the whole process relies on the unique radio unit's serial number.

This number identifies the exact head unit installed in your Chrysler 300.

This is even better, because if you have an aftermarket radio, the VIN or other vehicle-specific data wouldn't help.

Depending on the radio used, you may be able to see the serial directly from the screen or by checking the label on the radio chassis.

Identify Your 2021 Chrysler 300's Factory Radio

The 2021 Chrysler 300 continues with the Uconnect 4 family. There are three factory head units to identify: one 7-inch and two 8.4-inch variants that differ only in built-in navigation.

  1. Uconnect 4 (UAG) - 7-inch touchscreen, non-NAV. Standard on the entry 300 Touring. Visual ID: smaller 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 built-in NAV app or Map tile on the home screen.
  2. Uconnect 4C (UAS) - 8.4-inch touchscreen, non-NAV. Common on Touring L and 300S when the customer skips the navigation option. Visual ID: large 8.4-inch screen filling the dash opening, CarPlay and Android Auto present, but no Map/NAV tile because navigation is not built in.
  3. Uconnect 4C NAV (UAQ) - 8.4-inch touchscreen with built-in GPS. Standard on 300C and 300S Premium, frequently optioned on Touring L. Visual ID: identical 8.4-inch bezel and screen size to UAS, but the home screen carries a dedicated NAV/Map tile and on-board maps work without a phone.

Telling UAS apart from UAQ is purely a software check - identical hardware face, but only UAQ shows a Map/NAV tile and on-board maps.

Before Removing the Radio, Try This Screen Method

The method for 2021 Chrysler 300 is this:

The 2021 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. Go to: System Info → Radio Part Info → Serial Number.

Quick Method: Find the Serial Number on the Screen

The 2021 Chrysler 300 continues with 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 normally be read on screen through a hidden dealer/diagnostic menu, although some 2021 builds with newer Uconnect software may have dealer mode access tightened.

Uconnect 4C 8.4 (UAQ / UAS)

  1. Switch the ignition to RUN/ACC and wait for the Uconnect interface to finish booting.
  2. Press and hold the driver-side temperature UP, the driver-side temperature DOWN, and the front DEFROST buttons together for roughly 5-10 seconds.
  3. If the climate-button method does nothing, press and hold the bottom-left and bottom-right corners of the screen at the same time for about 5-10 seconds.
  4. Browse to the radio/system info section to read the 14-character serial number on screen.
  5. Photograph the screen so each character can be transcribed without typos.

Uconnect 4 7-inch (UAG)

  1. Place the ignition in RUN/ACC and let the screen finish loading.
  2. Press and hold both temperature UP and temperature DOWN buttons together for around 5-10 seconds to enter the engineering menu.
  3. Open System Info / Target Main Data to view the serial number on screen.
  4. Snap a photo of the display so the digits can be copied accurately.

300's Hardware Label Method

If the serial number cannot be accessed through menu, use the hardware method.

Most Chrysler 300 original radios include a label with the serial number printed on the housing.

Step-by-Step:

  1. Switch off the vehicle.
  2. Remove the bezel surrounding the radio.
  3. Loosen the mounting bolts.
  4. Pull the unit forward to access the label.

The serial number is usually located near the printed code.

If Dealer Mode is unavailable on the 2021 Chrysler 300, remove the RA4 unit from the 300's center stack. The bezel corner press sometimes fails after OTA firmware updates.

  1. Remove the center stack trim with a plastic trim tool.
  2. Remove the 4 Phillips mounting screws.
  3. Pull the unit out to access the serial label on the side or back of the chassis.

Chrysler 300's Hardware Label Method

If dealer mode has been restricted on the 2021 Chrysler 300 by a Uconnect software update, the printed chassis label still carries the radio serial. The Uconnect 4 head unit on the LD-platform 300 sits inside a centre stack closely tied to the climate cluster, so methodical removal is essential.

  1. Safety first: switch 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.
  2. 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.
  3. Pry the centre instrument panel bezel free with a plastic trim tool starting at the bottom edge - on the LD 300 this bezel also carries A/C-heater control and clock connectors, so keep pressure even.
  4. Unplug the climate and clock connectors at the rear of the bezel before laying it on a clean cloth.
  5. Remove the mounting fasteners (typically four screws, two upper and two lower) holding the radio cage to the support bracket.
  6. Slide the radio rearward and disconnect the antenna lead and the multi-pin power/data harness.
  7. The serial number sits on a printed barcode/sticker label on the top or side of the radio chassis, alongside the part number and supplier markings.
  8. Photograph the label and double-check ambiguous characters such as 0/O, 1/I and B/8 before submitting the serial. If working around the airbag wiring or the integrated climate cluster is uncomfortable, have a professional installer take the unit out for you.
Chrysler 300 2021 radio serial number label location

Example: Chrysler 300 serial number label location

S/N Patterns and Prefixes

Year Chrysler 300 RA4 serial formats:

  • T00AM – Harman RA4 Uconnect 4C (primary format on the 300)
  • T00BE – Continental version

Serial is 14 alphanumeric characters. Skip the part number (starts with P or 68).

Standard Serial Number Patterns on This Radio

The factory radios on the 2021 Chrysler 300 follow the standard Mopar/Uconnect serial style, with the prefix depending on the Uconnect tier and the supplier (Visteon, Continental, Harman or Panasonic) that built the unit.

Uconnect 4C 8.4 (UAQ / UAS)

  1. Typically printed as a 14-character alphanumeric string on the chassis label.
  2. Commonly begins with T - frequent prefixes include T00AM, TM9 and TQ1 - or with A2C on Continental-built variants.
  3. Usually a continuous run of letters and digits with no dashes or spaces.

Uconnect 4 7-inch (UAG)

  1. Usually carries a Mopar/Harman or Panasonic-style serial printed on the chassis sticker, so the label on the unit itself is the authoritative reference.
  2. Always copy the serial exactly as printed and avoid guessing characters that look unclear.

Why Is the Radio Asking for a Code?

The 2021 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:

  • Blown fuse after electrical work
  • Buying the 300 pre-owned without a known code
  • Battery disconnect during service
  • Battery drained from storage

Code comes from the radio serial number — not the VIN.

Understanding Unlock Issues with Your 300

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.

If no code prompt appears, anti-theft is inactive. Trigger it: briefly pull the radio fuse, reconnect, turn ignition to ON.

3 wrong entries lock the 300 RA4 for 60 minutes. Keep ignition in ON or ACC. Turning off restarts the timer from zero.

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 you read from the screen, cross-check against the physical label. Screen glare on the 8.4" can cause misreads. Contact support for a free re-check if needed.

On the 300 RA4 label: serial = 14 alphanumeric chars starting with T00AM or T00BE. Part number starts with P or 68 — not the serial.

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