How to Retreat 2021 Chrysler 300C Radio Code [Guide]

Unlock your 2021 Chrysler 300C radio in just a few steps. Simply enter the serial number to generate your code - no VIN required. Follow the full guide below if you need help finding or entering your code.

Delivery is instant in most Chrysler 300Cs.
Rare Chrysler cases may take up to 24 hours.

No VIN required - just enter the serial number of the radio.
No documents required.

You're covered by a 100% money-back guarantee.
A proof that the code failed may be required.
Check the Refund Policy page for more information.

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)
Chrysler 300C 2021 car photo
How to find Chrysler 300C 2021 radio serial number
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Can't Find Your Unit's S/N? Follow The Steps Below for Chrysler 300C 2021

Very important thing to know is that factory radios use a unique serial number to identify each unitindividually.

Your security system matches the code directly to this serial.

Unlike car-specific data such as VIN or registration info, it is not determined by the model or production year, so you'll be able to generate it even if you have a radio that you installed afterwards.

Depending on the maker and radio installed in your Chrysler 300C, the access method varies.

Here are the most reliable ways to locate it.

2021 Chrysler 300 / 300C Factory Radios

For the 2021 model year Chrysler temporarily dropped the 300C trim from the line-up - the available trims were Touring, Touring L and 300S. A 2021 car badged as 300C therefore is either a carry-over reference, an export-market variant, or a 2021 300 fitted with the same UAQ NAV head unit that flagship-trim cars have used since 2018. The Uconnect 4 hardware family is otherwise unchanged.

  • Uconnect 4C NAV (UAQ) - 8.4-inch touchscreen with built-in GPS. Frequently optioned on 2021 300S and present on retained-name 300C / export configurations. Visual ID: 8.4-inch screen filling the dash opening, dedicated NAV/Map tile on the home screen, on-board maps without a phone, plus Apple CarPlay and Android Auto.
  • Uconnect 4C (UAS) - 8.4-inch non-NAV touchscreen. Common on Touring L and 300S without the navigation upgrade. Same 8.4-inch glass as UAQ but no Map/NAV tile.
  • Uconnect 4 (UAG) - 7-inch non-NAV touchscreen. Standard on the entry Touring and listed for completeness if a smaller screen has been retrofitted to a 300C.

Field check: 8.4-inch screen with a Map tile = UAQ. 8.4-inch with no Map tile = UAS. Smaller 7-inch screen = UAG.

Using Hidden Radio Menus to Find the Serial

The method for 2021 Chrysler 300C is this:

The 2021 Chrysler 300C — the HEMI V8 top-trim final-generation 300 — features the Uconnect 4C (RA4). Press the bottom-left and bottom-right corners of the physical bezel frame simultaneously for 5 seconds (ignition ACC or ON) to open Dealer Mode. Go to: System Info → Radio Part Info → Serial Number.

Important Press the plastic bezel frame, not the touchscreen surface itself.

Find the Serial Number on the Screen

The 2021 Chrysler 300 / 300C 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)

  • 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 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.
  • Browse to the radio/system info section to read the 14-character serial number on screen.
  • Photograph the screen so each character can be transcribed 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 to view the serial number on screen.
  • Snap a photo of the display so the digits can be copied accurately.

Serial Number on the Unit

If the serial number cannot be accessed via display, use the hardware method.

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

The process:

  • Remove key from ignition.
  • Lift away surrounding panel pieces.
  • Release clips holding the radio.
  • Move slightly to inspect the label.

If Dealer Mode is unavailable on the 2021 Chrysler 300C 300C, remove the RA4 from the luxury cabin center console.

  1. Remove the center bezel with a plastic trim tool — take care with the premium finish.
  2. Remove the 4 Torx T20 mounting screws.
  3. Slide the unit forward to read the serial label on the side or back of the chassis.

Chrysler 300C's Hardware Label Method

If dealer mode has been restricted on a 2021 Chrysler 300 / 300C 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.

  • 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.
  • 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.
  • 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 the A/C-heater control and clock connectors, so keep pressure even.
  • Unplug the climate and clock connectors 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.
  • 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.
  • 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 300C 2021 radio serial number label location

Example: Chrysler 300C serial number label location

What a Valid Serial Number Looks Like

Year Chrysler 300C RA4 serial patterns:

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

Serial is 14 alphanumeric characters. Part number (starts with P or 68) is on the same label — ignore it.

Standard Serial Number Patterns on This Radio

The factory radios on the 2021 Chrysler 300 / 300C 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)

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

Uconnect 4 7-inch (UAG)

  • 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.
  • Always copy the serial exactly as printed and avoid guessing characters that look unclear.

From Serial Number to Unlock Code for your Chrysler 300C - Explained

Getting your radio code takes only a few easy steps.

  1. Find the radio's serial - this is the only information required to generate the correct unlock code.
    Unlike dealership lookup, no VIN is needed.
  2. When you've found the S/N, type it into the form above.
    The system checks it against a database of supported units and automatically retrieves the matching anti-theft code.
  3. In most cases, the code appears instantly on the screen after payment and is also sent to your email , just in case.
    If manual verification is required (rare situations), you'll be informed before checkout.
  4. Once you get it, simply enter it into the radio to restore full functionality.

How Code Entry Works on Your Chrysler Radio

Once the system gives you 2021 Chrysler 300C radio code from the serial number, you're ready to reactivate the radio.

Some drivers hesitate 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 Code Input Guide

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

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

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

The Correct Way to Enter It

Once the unlock code is in hand, the 2021 Chrysler 300 / 300C Uconnect head unit can be unlocked 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 drops into a WAIT state, so verify every digit before pressing it.
  • 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 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.

Understanding Unlock Issues with Your 300C

The 300C RA4 label has both serial and part number. Serial: 14 chars starting with T00AM or T00BE. Part number (skip): starts with P or 68.

Re-read the label carefully. Contact support for a free re-check if needed.

The 300C Uconnect 4C uses touchscreen-only code entry. Press each digit on the on-screen keypad. Auto-unlocks after the 4th digit. No physical buttons needed.

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

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

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

Why Did the Radio Lock and Ask for a Code?

The 2021 Chrysler 300C RA4 activates anti-theft after battery is disconnected. The HEMI-spec 300C uses the same lock system as all Uconnect RA4 radios.

Typical cause: battery replacement or disconnect. Other causes:

  • Blown fuse after electrical work
  • Buying the 300C pre-owned without a code
  • Battery disconnect for service
  • Battery dead from sitting

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

Get Your Chrysler 300C 2021 Radio Code Now