Chrysler 300 Heater Core for Sale | OEM Used HVAC Heater Core for Modern

Description

About the Chrysler 300 Heater Core

Looking for a replacement Chrysler 300 heater core? Part Nests sources OEM used HVAC heater cores for modern Chrysler 300 full-size RWD sedan applications. The modern Chrysler 300 was Chrysler’s full-size rear-wheel-drive sedan flagship from 2005 through 2023 (19-year production), built on the LX platform (1st generation 2005-2010) and LD platform (2nd generation 2011-2023). The Chrysler 300 was DISCONTINUED after 2023 along with the Dodge Charger and Dodge Challenger as Stellantis ended the LX / LD platform – the modern 300 era is now closed. The 300 revived the famous 300 nameplate from Chrysler’s 1950s heritage (the original 300 letter series cars – 300C, 300D, etc. – were powerful luxury performance cars). The modern 300 was offered with multiple engine variants from the 2.7L V6 (earliest base) up to the 6.4L Hemi V8 (300C SRT8 top performance). The modern Chrysler 300 (this listing) is NOT the same as the Chrysler 300M (1999-2004 – – the 300M was FWD LH platform, while the modern 300 was RWD LX / LD platform. The heater core is a standard HVAC tube-and-fin heat exchanger that transfers heat from engine coolant to cabin air for heating. Call (855) 634-4447 to verify your Chrysler 300 year and engine before ordering.

Chrysler 300 Heater Core Specifications

• Type: OEM HVAC heater core for Chrysler 300 (2005-2023 LX / LD platform)
• Function: Heat exchanger that transfers heat from engine coolant (typically 200°F under operating conditions) to cabin air flowing through the HVAC system; provides cabin heating in cold weather
• Construction: Tube-and-fin design – coolant flows through internal tubes while cabin air flows across external fins for heat transfer; aluminum or copper-brass construction; inlet and outlet ports for coolant lines
• Mounting: Mounted inside HVAC plenum behind dashboard; accessed through HVAC system disassembly (typically labor-intensive); coolant lines connect via hoses to engine cooling system
• Engine compatibility: Generally same heater core specification across engine variants for a given year / generation, but verify specific application
• Application: Modern Chrysler 300 2005-2023 (19-year production); specify your year, generation (1st gen 2005-2010 LX or 2nd gen 2011-2023 LD), and engine variant when ordering

Modern Chrysler 300 Platform Context (2005-2023)

• 300 nameplate revival: The modern Chrysler 300 (2005+) revived the famous 300 nameplate from Chrysler’s 1950s heritage (the original 300 letter series cars 300A-300L were luxury performance cars 1955-1965); the modern 300 brought back the muscular full-size RWD sedan concept
• 1st Generation 2005-2010 (LX platform): Launched 2005 as the first all-new Chrysler full-size RWD sedan in decades; bold styling that became iconic; replaced FWD Chrysler Concorde / Chrysler 300M (300M; shared LX platform with Dodge Charger / Dodge Magnum (wagon) / Dodge Challenger
• 2nd Generation 2011-2023 (LD platform): Major styling refresh and platform update; new interior, updated engines; continued through 2023 model year
• 2023 Discontinuation: Chrysler 300 production ended after 2023 model year along with Dodge Charger and Dodge Challenger as Stellantis (FCA successor) ended the LX / LD platform; the modern 300 era is now closed; aftermarket / used parts supply will be the long-term source for these vehicles
• Engine variants (across both generations): 2.7L V6 (earliest base – 1st gen entry-level), 3.5L V6 (1st gen mid-trim), 3.6L Pentastar V6 (most common base 2011-2023 – high-volume engine), 5.7L Hemi V8 (iconic 300C – the muscle-sedan flagship), 6.4L Hemi V8 (300C SRT8 – top performance variant); diesel variant in some markets (3.0L EcoDiesel)
• Trim levels: Base (LX, Touring), 300C (Hemi V8 flagship), 300 S (sport-styled), 300 Limited, 300C SRT8 (high performance), Platinum / various special editions
• Sister vehicles (LX / LD platform): Dodge Charger (sedan – LX 2006-2010, LD 2011-2023; same heater core specification typically), Dodge Magnum (wagon – LX 1st gen only 2005-2008), Dodge Challenger (LC platform variant – based on LX architecture)
• Significance: The modern 300 / Charger / Challenger LX / LD platform vehicles brought back the full-size American RWD sedan / muscle car concept that had largely disappeared from US automotive market by the late 1990s; influential platform during 2005-2023 production era

Why Customers Confuse 300 with 300M

• Similar names, different vehicles: The modern Chrysler 300 (2005-2023 RWD) and the Chrysler 300M (1999-2004 FWD – have similar names but are completely different vehicles on different platforms
• 300M was the predecessor: The 300M (FWD LH platform) was sold 1999-2004; the modern 300 (RWD LX platform) launched 2005 replacing the 300M
• Major architectural change: Going from 300M to modern 300 was a major change – FWD LH “cab-forward” platform → RWD LX platform; different engine layouts, different chassis, different parts entirely
• Cross-reference: See Chrysler 300M Heater Motor listing for the 1999-2004 300M context; the heater core specifications between 300M (FWD LH) and modern 300 (RWD LX) are NOT cross-compatible

Heater Core Function and Failure Patterns

• HVAC integration: Heater core is part of the HVAC system; works with HVAC plenum, blower motor, heater control valve (some variants), blend door (controls hot / cold air mixing), HVAC ducting
• Coolant integration: Connected to engine cooling system via coolant hoses; coolant flows through heater core continuously; heater control valve (where equipped) regulates flow
• Common failure modes: Internal leak (coolant leaks into HVAC plenum – sweet smell from vents, coolant on passenger carpet, fogging windshield), external leak at inlet / outlet ports (coolant under hood near firewall), kinked tubes (reduced flow), corroded fins (reduced heat transfer efficiency), age-related fatigue failure
• Symptoms requiring replacement: Sweet smell (coolant) inside cabin, coolant on passenger floor, foggy or steamy windshield (especially with HVAC on), reduced or no cabin heat, coolant loss without external engine bay leak
• Replacement consideration: Heater core replacement is highly labor-intensive on modern vehicles (typically requires substantial dashboard / HVAC system disassembly); allow significant labor budget; verify HVAC system function before reassembly; bleed cooling system after coolant line reconnection

Vehicle Compatibility

Why Buy From Part Nests

• Part verified as OEM HVAC heater core for modern Chrysler 300 full-size RWD sedan applications
• Application: Modern Chrysler 300 full-size RWD sedan 2005-2023 (19-year production); DISCONTINUED after 2023 along with Dodge Charger / Challenger as Stellantis ended LX / LD platform
• NOT the same as Chrysler 300M: modern 300 (2005-2023) is NOT 300M (1999-2004 -; major architectural change from FWD LH platform (300M) to RWD LX platform (300)
• Two generations: 1st gen 2005-2010 LX platform (revived 300 name from 1950s heritage), 2nd gen 2011-2023 LD platform (major styling refresh)
• Engine variants: 5.7L Hemi V8 (iconic 300C), 6.4L Hemi V8 (300C SRT8), 3.6L Pentastar V6 (common base 2011-2023), 3.5L V6, 2.7L V6
• Tube-and-fin integrity verified (no kinked tubes, no damaged fins beyond cosmetic)
• Pressure tested for leaks (no fluid leaks under operating pressure)
• Inlet / outlet connection inspected (clean fluid connection surfaces, threaded ports intact)
• Cross-reference: Dodge Charger (LX / LD platform sister), Dodge Magnum (LX 1st gen wagon variant 2005-2008), Dodge Challenger (LC variant of LX architecture) – same heater core specification typically
• Free shipping to all 50 states
• 15 day replacement warranty on component defects
• Chrysler 300 LX / LD platform and 300 / 300M distinction knowledge from our support team
• Call (855) 634-4447 to confirm the correct part for your build before ordering.