YEHERIT Coolant Reservoir Tank for 2013–2018 Ram 2500/3500/4500/5500 6.7L — Direct-Fit with Sensor & Cap, Heat-Resistant

YEHERIT 603-839 coolant reservoir tank is a direct-fit replacement for 2013–2018 Ram 2500/3500/4500/5500 6.7L diesel engines that includes the sensor and cap for a complete overflow system upgrade.

If your Ram’s coolant expansion tank is cracked, leaking, or the level sensor has failed, swapping in a full assembly built to match OE mounting points restores proper coolant control and helps maintain reliable engine temperatures. This YEHERIT unit replaces multiple factory part numbers (including 68166475AC, 68096261AA, 68166475AB) and is molded from heat- and pressure-resistant plastic to withstand under-hood conditions common in heavy-duty trucks.

How will this reservoir tank reduce coolant loss and protect my engine?

The tank manages coolant overflow and preserves the correct system fill by collecting excess fluid when the engine warms and returning it as the system cools. A functioning cap and integrated level sensor help prevent air intrusion and provide accurate level readings for your vehicle’s monitoring system.

• Direct-fit replacement that restores overflow containment and return flow
• Includes level sensor and cap to maintain sealed system performance
• Resists heat and pressure to avoid warping or cracking under load

Will this part fit my Ram 2500/3500/4500/5500 6.7L diesel?

YEHERIT designed this reservoir specifically for 2013–2018 Ram trucks equipped with the 6.7L inline-six diesel; it matches OE mounting points and hose connections for those model years. Always compare your vehicle’s year, engine code, and the old part number to ensure compatibility before purchasing.

• Compatible with model years 2013–2018 and L6 6.7L engines
• Replaces part numbers like 603-839, 68096261AA, 68166475AB, 68166475AC
• Check existing tank shape, mounting studs, and connector locations to confirm fit

How difficult is installation and what tools are required?

Installation is engineered to be straightforward and typically requires basic hand tools—no cutting, welding, or modifications. The unit installs using the truck’s stock brackets and hoses; sensor wiring plugs into the existing connector for a quick swap-out.

• Uses original mounting points and hose fittings for plug-and-play replacement
• Standard tools (ratchet, sockets, screwdrivers) are usually sufficient
• Install time typically under an hour for a DIYer familiar with engine-bay work

What materials and quality features does this replacement offer?

The reservoir is made from high-quality automotive-grade plastic formulated to resist high temperature and pressure cycles in diesel engine bays. Molded accuracy and reinforced mounting areas improve long-term durability compared with brittle or degraded OEM units.

• Heat- and pressure-resistant plastic for extended service life
• Integrated sensor port and factory-style cap for full system function
• Manufactured to match OE dimensions and connection points

Who is this for: This YEHERIT coolant reservoir assembly is aimed at Ram 2500/3500/4500/5500 owners with the 6.7L diesel who need a reliable replacement for a cracked or malfunctioning expansion tank, technicians performing routine cooling-system repairs, and fleet managers seeking a cost-effective OEM-style spare. If you prioritize correct fitment, restored level sensing, and a durable material build, this direct-fit tank with sensor and cap provides a practical, fast solution.