2021 Chrysler 300 Service and Repair Manual

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Factory-Grade Data

2021 Chrysler 300 service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Designed for technicians and DIY owners, this manual helps you diagnose issues correctly, follow proven repair steps, and use wiring diagrams and system sections to track faults faster.

What’s included

  • Step-by-step repair procedures and service information
  • Specifications and reference data (where provided)
  • Electrical diagnostics with wiring diagrams
  • Coverage across major systems: engine, transmission/driveline, brakes, steering, suspension, HVAC, and more

Trims covered

  • SS Sport Utility 4-Door
  • Base Sport Utility 4-Door
  • LT Sport Utility 4-Door
  • B Sport Utility 4-Door
  • LS Sport Utility 4-Door
  • A Sport Utility 4-Door
  • Touring L Sedan 4-Door
  • C Sedan 4-Door
  • Touring Sedan 4-Door
  • S Sedan 4-Door

Engines covered

  • 6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated
  • 4.2L 256Cu. In. l6 GAS DOHC Naturally Aspirated
  • 5.3L 5328CC 325Cu. In. V8 GAS OHV Naturally Aspirated
  • 3.6L 3604CC 220Cu. In. V6 FLEX DOHC Naturally Aspirated
  • 3.6L 3604CC 220Cu. In. V6 GAS DOHC Naturally Aspirated
  • 5.7L 345Cu. In. V8 GAS OHV Naturally Aspirated

Index / Table of contents

  • Body
  • Brakes
  • Chassis Electrical
  • Driveline
  • Engine Cooling
  • Engine Electrical
  • Engine Mechanical
  • Engine Performance & Emission Controls
  • Fuel System
  • General Information & Identification
  • Heating, Ventilation, & Air Conditioning
  • Hybrid & Electric Vehicle Systems
  • Steering
  • Suspension
  • Transmission, Clutch, & Transfer Case
  • Wiring Diagrams

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Vehicle Safety Data

2021 Chrysler 300 Recalls & Complaints

NHTSA #24V19800014/03/2024Component: AIR BAGS:SIDE/WINDOW:CURTAIN:INFLATOR

Chrysler (FCA US, LLC) (Stellantis) is recalling certain 2018-2021 Dodge Charger and Chrysler 300 vehicles. The right and left side curtain air bag inflators may rupture due to a manufacturing defect

Consequence

An inflator rupture may result in sharp metal fragments striking occupants, resulting in injury or d

Remedy

Dealers will replace both side curtain air bags, free of charge. Owner notification letters were ma

NHTSA #21V51600008/07/2021Component: VISIBILITY:WINDSHIELD

Chrysler (FCA US, LLC) is recalling certain 2020-2021 Dodge Challenger, Dodge Charger, and Chrysler 300 vehicles. During manufacturing, the windshield may not have been properly bonded to the vehicle

Consequence

A windshield that separates from the vehicle during a crash can increase the risk of injury.

Remedy

Dealers will remove and replace the front windshield urethane sealant, free of charge. Owner notifi

TSB #11030269

Backup Camera Poor Image Quality Inspection

TSB #11030229

Flash: Powertrain Control Module (PCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must SYMPTOM: exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): **P0111-00 - In

TSB #11030138

The vehicle will exhibit a service transmission/check engine warning indicator for the following transmission models: 845RE, 8HP45, 850RE, 8HP50, 8HP70, 8HP75, 8HP75-PHEV, 8HP75-LCV, 8HP90, 8HP95. Transmissions may exhibit the following dia

TSB #11030042

Active Diagnostic Trouble Code (DTC) B1A10-00, B1A11-00, B1A12- 00, B1A13-00-, B1A14-00, B1A15-00, B1A16-00, and B1A17-00 in The Radio Frequency Hub (RFH)

TSB #11028904

Start Stop Charging Warning Lamp Illuminated On, Intelligent Battery Sensor (IBS) State of Charge (SOC) Inaccurate, Battery Charging Message, Presence of IBS Related Diagnostic Trouble Codes (DTCs), or Battery Warning Lamp On

TSB #11027843

D-25-17 Rev. A ALL Model Years 2019 - 2021 VF, DS, LA, LD and LX with a 3.6L Engine for Camshaft and/or Rocker Arm Replacements

TSB #11027842

ID-25-14 Rev. A ALL Model Years 2019 - 2021 VF, DS, LA, LD and LX with a 3.6L Engine for Camshaft and/or Rocker Arm Replacements

TSB #11026651

Verify "Z" part number availability. Order a "Z" part number for all Exchange Orders: Warranty, Mopar, Customer pay and Service contract. Order"68" part number for New unsold units only

Showing the 8 most recent of 234 technical service bulletins on file with NHTSA.

20260508Component: EXTERIOR LIGHTING:HEADLIGHTS

The contact owns a 2021 Chrysler 300. The contact stated while parked and occupied in the vehicle or driving the contact noticed the headlights have failed to work as intended. A dealer was contacted.

20250624Component: FUEL/PROPULSION SYSTEM

I bought my car, Chrysler 300 2021 at the Hemet CA Dealership in 2021. Hemet Chrysler Dodge Jeep Ram. The car presented with several issues including, difficulty starting, engine misfires, stalling

20250519Component: ENGINE

Chrysler 300 2021 Vehicle keeps stalling, turning off while driving or if stopped at light or stop sign to loan just shuts random times and not Al way but enough to be dangerous when it stalls on free

20250519Component: SEAT BELTS

Chrysler 300 2021 Vehicle keeps stalling, turning off while driving or if stopped at light or stop sign to loan just shuts random times and not Al way but enough to be dangerous when it stalls on free

20250519Component: VEHICLE SPEED CONTROL

Chrysler 300 2021 Vehicle keeps stalling, turning off while driving or if stopped at light or stop sign to loan just shuts random times and not Al way but enough to be dangerous when it stalls on free

Showing the 5 most serious of 25 complaints filed with NHTSA.

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