RANSOTO Power Steering Reservoir for 2011–2014 Dodge Challenger/Charger & Chrysler 300 — Direct-Fit, Cap & O‑Rings

RANSOTO 603-939 is a direct-fit replacement power steering fluid reservoir designed to restore fluid containment and venting for 2011–2014 Dodge Challenger, Charger, and Chrysler 300 3.6L and 5.7L engines.

This reproduction reservoir assembly includes the cap and two O-rings and is manufactured to match the OE fitment and function for part numbers 68059524AK, 68059525AK, and 68059643AK. It’s molded to resist engine-bay heat and vibration, and is pressure-tested before shipment to help ensure reliable installation. The unit arrives ready to install, minimizing downtime and the need for additional parts.

Will this reservoir fit my 2011–2014 Chrysler 300 or Dodge Challenger/Charger?

This RANSOTO reservoir is engineered as a direct replacement for specific 3.6L and 5.7L applications from 2011 through 2014. Confirm your vehicle’s engine size and original part number to ensure compatibility.

• Compatible models: Chrysler 300, Dodge Charger, Dodge Challenger (2011–2014).
• Engine sizes covered: 3.6L V6 and 5.7L V8.
• Replaces part numbers: 603-939, 68059524AK, 68059525AK, 68059643AK.
• Check OEM part number or vehicle fitment guide before purchase.

How simple is installation and what’s included?

Installation is straightforward for anyone comfortable with basic under-hood work; the reservoir mounts at existing OEM points and connects to factory hoses. The package contains the reservoir, a matching cap, and two O-rings so you won’t need to source small seals separately.

• Included parts: 1 reservoir, 1 cap, 2 O-rings.
• No special tools required beyond common hand tools and possibly a coolant catch pan.
• Pre-tested for leaks to reduce initial troubleshooting after fitment.
• Follow vehicle service manual torque and bleed procedures after install.

What materials and durability features does this reservoir offer?

The reservoir is made from engineered plastic formulated for under-hood use, offering resistance to heat, chemical exposure, and vibration common in modern engine bays. Quality control includes multiple tests to confirm dimensional accuracy and seal integrity.

• Heat-resistant plastic to withstand engine-bay temperatures.
• Vibration-tested to reduce risk of cracks or stress failure.
• Precision-molded port fittings for reliable hose sealing.
• Supplied O-rings to ensure a leak-free connection at installation.

Who is this for: RANSOTO’s 603-939 reservoir is intended for owners, mechanics, and restoration specialists who need a dependable replacement for worn, cracked, or leaking power steering reservoirs on 2011–2014 Chrysler 300, Dodge Charger, and Challenger models with 3.6L or 5.7L engines. It’s also suitable for shops that prefer keeping OE-equivalent parts on the shelf to minimize repair time. If you want an easy, direct-fit swap that includes the cap and seals and is covered by a lifetime warranty, this assembly is designed to meet that need.