Radio Serial Number Explained - Finding It on Your Chrysler
Very important fact to know is that factory radios use a specific serial number to identify each unit.
The security system matches the code directly to this serial.
Different from vehicle-specific data such as VIN or registration information, it is not determined by the model or production year, so you'll be able to get it even if you have an aftermarket radio.
Depending on the maker and radio installed in your Chrysler 300, the access method is different.
Here are the most reliable ways to find it.
Factory Radios on the 2017 Chrysler 300
2017 is the final year of the original LD-facelift Uconnect lineup before the 4C generation became dominant. Most 2017 builds still carry the RA2 / RA3 / RA4 family, with a small number of late-build cars beginning to ship with the new Uconnect 4C 8.4 (UAS / UAQ) head unit that introduced Apple CarPlay and Android Auto. The radio you find depends on build date and option box.
Uconnect 5.0 / RA2 - the small 5-inch base radio still fitted to lower 300 Limited builds, with no CD slot and no NAV button. Uconnect 8.4 / RA3 - the 8.4-inch landscape touchscreen without factory navigation; capacitive shortcut keys along the bottom and no Nav tile on the home page. Uconnect 8.4 NAV / RA4 - the same 8.4-inch hardware plus the Garmin nav database, standard on 300C trims; look for a Nav tile on the home screen and a SiriusXM Traffic / Travel Link splash at start-up. Uconnect 4C 8.4 (UAS / UAQ) - the new-generation 8.4-inch head unit on late-build 2017 cars, visually similar to the RA3 / RA4 bezel but with Apple CarPlay and Android Auto tiles available when a phone is plugged in via USB; UAS is the non-nav variant, UAQ adds the Garmin nav database.
Quick tell: 5-inch screen = RA2; 8.4-inch screen with no CarPlay tile and no Nav tile = RA3; 8.4-inch screen with no CarPlay tile but a Nav tile = RA4; 8.4-inch screen that shows CarPlay / Android Auto when a phone is plugged in = 4C UAS / UAQ. The sales code is printed on the label on top of the radio - pull the bezel and check the chassis to confirm.
Access Your S/N on the Radio Display
The method for 2017 Chrysler 300 is this:
The 2017 Chrysler 300 full-size sedan is equipped with the Uconnect 8.4" Classic (RA3), which supports a hidden Dealer Mode to reveal the serial number directly on screen.
On the 300, the Climate Up, Climate Down, and Front Defrost buttons sit directly below the 8.4" screen on the center stack. Hold all three simultaneously for 5 seconds with the ignition in ACC or ON. Dealer Mode opens. Navigate to: System Info → Radio Part Info → Serial Number.
Read the Serial Number From the Touchscreen
For 2017 Chrysler 300 cars fitted with an 8.4-inch Uconnect, the head unit supports a hidden dealer / diagnostic menu that displays the radio's internal serial number. The shortcut is the same on the older RA3 / RA4 and on the newer Uconnect 4C UAS / UAQ.
Uconnect 8.4 (RA3, RA4, UAS, UAQ)
Place the ignition in RUN so the touchscreen is fully booted. Press and hold the driver's temperature UP, temperature DOWN and front DEFROST buttons together for around 7 seconds. When the dealer / diagnostic menu opens, choose the radio-information entries near the top of the list - they list serial numbers, hardware and software revisions and similar identifiers. Note the full serial exactly as printed, including any leading letters such as T00AM, TM9 or A2C. Press Done, or cycle the ignition off and on, to leave the menu.
Uconnect 5.0 (RA2)
For the small 5-inch RA2 base radio, an equivalent on-screen serial-number readout is not consistently documented on the 2017 300. If the dealer-mode shortcut does not bring up a serial entry on the RA2, the chassis-label method covered in the radio-removal block is the dependable fallback.
View the S/N by Pulling Out the Radio Unit
If the serial does not appear in menu, the next step is checking the radio itself.
Many Chrysler radios require physical access to the serial sticker attached to the unit.
Typical approach:
- Start by completely powering down the engine - pull the key out.
- Then remove the radio surround.
- Next, unscrew the mounting points and slide the radio forward.
- Look for a barcode label showing the serial number.
If Dealer Mode is unavailable on the 2017 Chrysler 300, remove the RA3 unit from the 300's center stack. The 300's tall vertical center console provides good clearance once the bezel is off.
- Remove the trim panel with a plastic trim tool — clips hold it.
- Remove the 4 Phillips mounting screws.
- Pull the unit forward to read the serial label on the top or side of the chassis.
Releasing the Head Unit to See the S/N Tag
If you cannot reach the hidden menu - for example because the radio is locked at the CODE prompt and the touchscreen is unresponsive - the chassis label is the most reliable source for the serial number on a 2017 Chrysler 300.
Safety preparation
Turn the ignition fully off and remove the key fob from the cabin. Disconnect the negative terminal of the 12V battery and wait several minutes before working near the dash, so any airbag-related circuits can fully discharge. Stay clear of yellow airbag wiring while pulling trim.
Tools to have ready
Plastic trim / panel pry tools to release bezel clips without marking the dash, a driver that matches the four radio retaining screws (typically Phillips or 7 mm), and a phone or camera to photograph the chassis label clearly.
Removal overview
Beginning at a lower edge, gently pry the centre dash bezel that surrounds the radio and HVAC controls. On the 2017 LD 300 the bezel is held by retaining clips rather than bolts. Walk the pry tool around the perimeter until each clip releases, then ease the bezel forward and unplug the small connectors on its back (hazard switch, clock and climate controls). With the bezel out of the way, undo the four retaining screws now visible at the corners of the radio chassis. Slide the head unit out and disconnect the main wiring harness and the antenna lead.
Where the serial sits
The serial is on a thermal-printed label on the metal chassis - usually the top or one side of the housing. Copy the long alphanumeric string next to the barcode and double-check ambiguous characters (O vs 0, I vs 1).
Tips
Photograph the label before refitting so the serial is preserved as a reference. Reassembly is the reverse of removal - harness back on, four screws home, bezel pressed in until each clip seats, then reconnect the battery.
Example: Chrysler 300 serial number label location
Serial Number Format Guide for 2017 Chrysler 300
The 2017 Chrysler 300 RA3 radio serial formats:
T00AM– Harman VP2 RA3 (most common on the 300)T00BE– Continental variantTM9– Earlier Harman production
Serial is 14 alphanumeric chars. The part number (starts with P05064 or 68) is on the same label — ignore it.
Typical Serial Number Examples for the 2017 Chrysler 300
The 2017 Chrysler 300 could leave the factory with one of several Uconnect head units, each from a different supplier, so the serial-number style varies by radio. The patterns below are the ones most often reported by owners and unlock services for this generation - treat them as guidance rather than a guarantee.
Continental-supplied Uconnect 8.4 (RA3 / RA4)
Frequently start with a T00AM prefix followed by a numeric tail, for example a string resembling T00AM1234567. The prefix is printed inline with the rest of the serial on the chassis label.
Continental-supplied Uconnect 4C 8.4 (UAS / UAQ)
Newer Continental 4C-generation head units fitted to late-build 2017 cars are sometimes associated with an A2C-style prefix in addition to the legacy T00AM. As always, the printed label on the chassis is the authoritative source.
Panasonic-supplied Uconnect units
Often start with TM9 followed by additional digits or letters. This pattern has been widely reported on Panasonic-built Mopar radios across the Uconnect 8.4 era.
Uconnect 5.0 (RA2) base radio
Also carries a printed serial label, but the prefix can vary by supplier batch - copy the full string off the label rather than assuming a fixed format.
If the alphanumeric you read does not match any of these examples, double-check that you have copied the serial line and not the part number. The serial is normally the longest string on the label and is the one tied to the barcode.
Code Entry Instructions
After generating the correct unlock code based on the serial number, you can restore normal functionality by entering it into the unit.
The code entry process depends on the radio interface, but most 2017 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 CODE displayed on screen.
Step-by-Step Code Input Guide
Entering the code on the 2017 Chrysler 300 Uconnect 8.4":
- Turn ignition to ON. Screen shows "ENTER CODE" or ----.
- Tap each digit of your 4-digit code on the on-screen keypad.
- Radio unlocks automatically after the 4th digit — no confirm button needed.
Lockout: 3 wrong attempts trigger a 60-minute lockout. Keep ignition ON for the full 60 minutes. Turning off restarts the timer.
Detailed Code Entry Instructions for Chrysler 300 2017
Once you have the correct anti-theft code for your 2017 Chrysler 300 radio, entry on the screen is fast - but the radio will lock itself out for half an hour if you keep entering wrong codes, so verify the code before you start.
Limited Attempt Warning
Only three attempts are allowed before lockout. Three consecutive wrong codes place the radio in a WAIT state and the display reads WAIT. To clear it, the radio must remain powered with the ignition in RUN for a continuous 30 minutes. The vehicle may be driven during that time, but cycling the key off does not bypass the timer.
Entering the code
Turn the ignition to RUN or ACC so the radio powers up and shows the CODE / Anti-Theft prompt. On the 8.4-inch Uconnect (RA3, RA4, 4C UAS or 4C UAQ), tap each digit on the touchscreen number pad. On the 5-inch Uconnect 5.0 (RA2), enter the digits using the preset (1-6) buttons in sequence. Confirm with the OK / Enter on-screen control or the equivalent hardware button. When the code is accepted, the radio returns to its normal home screen and audio resumes.
If it does not unlock
Stop after the second wrong attempt and recheck the serial you used to obtain the code. Make sure no leading letters or trailing digits were dropped from the serial. If WAIT appears, leave the radio powered with the ignition in RUN for the full 30 minutes before retrying.
Steps to Unlock Your 2017 Chrysler 300 Radio
To get the code, you'll take only 4 simple steps.
- Locate the radio's serial number - this is the only info required to generate the correct unlock code.
Unlike dealership lookup, no VIN or paperwork is needed. - When you've found the S/N, type it into the form above.
Our system checks it against a database of supported factory radios and automatically catches the matching security code. - In most cases, the code appears instantly on the screen after payment and is also sent to your email , just in case.
If we need to check it manually, you'll be informed before checkout. - When you receive the code, simply enter it into the radio to restore full functionality.
Fixing Common Code Entry Problems for 2017 300
The 300 Uconnect RA3 uses touchscreen-only code entry. Touch each digit on the on-screen keypad. No physical buttons needed. Confirms automatically after the 4th digit.
The radio chassis label: serial = 14 alphanumeric chars starting with T00AM, T00BE, or TM9. Part number = starts with P05064 or 68 — not the one you need.
If no code prompt appears, the anti-theft isn't active. It only fires after a battery disconnect.
Force the lock: briefly pull the radio fuse, reconnect, turn ignition to ON. Code screen appears at boot.
The 300's RA3 label shows both part number (P05064... or 68...) and serial. You need the 14-character serial starting with T00AM, T00BE, or TM9. Watch out for 0 vs. O on the label.
Reach out for a free re-check if the code was rejected after a careful read.
3 wrong entries lock the 300's Uconnect RA3 for 60 minutes. The screen keeps showing "ENTER CODE" but blocks input.
Keep ignition in ON or ACC for the full 60 minutes without turning off. Cutting power restarts the countdown.
Why Did the Radio Lock and Ask for a Code?
The 2017 Chrysler 300 Uconnect RA3 locks automatically whenever power is cut. A removed radio is worthless to a thief.
Most common trigger: battery replacement or disconnect. Other causes:
- Blown radio fuse after electrical work or shorts
- Buying the 300 second-hand without a known code
- Battery disconnect during service or repair
- Battery drained from not driving for weeks
The code is tied to the radio serial number — not the VIN. Works regardless of vehicle the unit is installed in.