LSHDLAM Coolant Reservoir Tank for Chrysler 300 — 603-380 Direct-Fit with Cap, Heat-Resistant Polypropylene

LSHDLAM 603-380 is a direct-replacement coolant overflow reservoir tank with cap engineered to restore your Chrysler 300 or compatible Dodge vehicle’s cooling system reliability.

If your factory coolant tank is cracked, leaking, or the level markings have faded, this LSHDLAM replacement offers a ready-to-install solution built to the original fit and mounting points. Molded from heat-resistant polypropylene and supplied with a pressure cap and visible level indicators, the 603-380 is designed for owners who need a dependable reservoir that matches OEM dimensions and performance for a range of Chrysler and Dodge V6 and V8 models.

Which vehicles will this reservoir tank work with?

This reservoir fits many Chrysler 300 and Dodge Challenger/Charger years and engine combinations where the OEM part number 55111260AB/AC/AF applies. It supports several 3.6L V6, 5.7L V8, and 6.4L V8 applications but excludes the 6.2L/6.4L V8 variants from certain 2015–2023 Challenger/Charger models noted below.

• Compatible: 2011–2021 Chrysler 300 (3.6L, 5.7L, 6.4L), 2011–2021 Dodge Challenger (including 2019 Scat Pack 6.4L), 2012–2014 Dodge Charger, plus select 2016–2021 Charger and Challenger models.
• Not compatible: Dodge Challenger 2015–2023 and Dodge Charger 2015–2023 vehicles equipped with 6.2L or 6.4L engines where OEM fit differs.
• OEM cross-reference: replaces 55111260AB / AC / AF for direct fitment in supported vehicles.

How durable and pressure-rated is the LSHDLAM 603-380 tank?

The tank body is injection-molded from reinforced polypropylene chosen for thermal endurance and chemical resistance. It is tested for repeated cycling and high-pressure resistance so it stands up to everyday engine bay conditions.

• Material: high-strength, heat-resistant PP (polypropylene).
• Pressure endurance: verified for 200,000 cycles at 35 PSI and a 100 PSI burst pressure rating.
• Includes a pressure cap designed to maintain appropriate cooling system pressure.

Will installation require modifications or professional help?

Designed as a direct OEM-style replacement, the 603-380 installs using existing mounting points and hoses — no cutting or trimming required. Most mechanically inclined owners can complete the swap with basic hand tools in a straightforward DIY job.

• Direct fit for OEM part numbers—no adapter brackets needed.
• Pre-marked translucent reservoir for fast coolant level checks.
• Common hand tools and moderate mechanical skill are all that’s required.

What practical benefits will I notice after replacing my coolant tank?

Replacing a worn or leaking overflow tank prevents coolant loss, helps maintain correct system pressure, and restores visible level monitoring. That means fewer surprises on the road and clearer indications when topping off or diagnosing cooling issues.

• Stops coolant seepage from cracked or brittle tanks.
• Restores system pressure integrity with included cap.
• Clear level markers make fluid checks quick and accurate.

Who this product is for: The LSHDLAM 603-380 reservoir tank is tailored for owners and independent repair shops working on compatible Chrysler 300, Dodge Challenger, and Dodge Charger models that require an OEM-style replacement. Choose this tank if you need a robust, ready-to-install coolant overflow reservoir with factory-fit dimensions, visible level markings, and a pressure-rated cap—especially when your vehicle shows signs of coolant loss, cracked plastic, or failing cap seals. Verify vehicle year and engine code against the compatibility notes to ensure correct fitment before purchasing.