PPNZQAUT Front Engine Coolant Reservoir Tank for Ford Transit 2015–2019 — Direct-Fit with Cap

This PPNZQAUT 603-844 front engine coolant reservoir tank (replacement for BK2Z8A080B) is a direct-fit aftermarket overflow tank designed to replace the factory reservoir on 2015–2019 Ford Transit models.

When the cooling system in your Transit needs a reliable replacement surge tank, this PPNZQAUT reservoir supplies the same mounting points and hose connections as the original equipment without the OEM price. Molded from durable plastic and supplied with a cap, the 603-844 tank is intended for 3.2L, 3.5L and 3.7L engine variants across Transit-150, -250, -350 and -350 HD model years 2015 through 2019. It’s an aftermarket part (not genuine Ford), built to fit and function where the BK2Z8A080B part is specified.

Will this reservoir fit my specific Ford Transit?

Compatibility covers a range of Transit models and engine sizes from 2015 to 2019, but always verify fitment for your VIN or vehicle spec before purchase. The PPNZQAUT 603-844 lists the same attachment points and placements used by the original tank.

• Fits Transit-150, Transit-250, Transit-350 and Transit-350 HD (2015–2019).
• Engine coverage: 3.2L (L5), 3.5L (V6), 3.7L (V6).
• Replaces part numbers: 603-844, 603844, BK2Z8A080B.
• Confirm compatibility with a VIN or the vehicle fitment tool before installation.

How does this coolant reservoir perform compared with the original?

Manufactured to match the fit and function of the OE tank, this aftermarket reservoir offers comparable performance for managing coolant expansion and recovery in normal operating conditions. It provides the same hose connections and mounting locations so it integrates into the existing cooling loop.

• Molded plastic construction for corrosion resistance and long service life.
• Designed to handle typical thermal expansion and coolant flow demands.
• Includes the filler neck and cap interface for standard coolant maintenance.
• Quality checks ensure mounts and ports align with factory locations.

What are the steps and precautions for replacing the surge tank?

Replacing the reservoir is straightforward for a qualified DIYer but involves coolant handling and hot components, so let the engine cool completely and consider professional installation if you’re unsure. Follow safety steps to avoid burns and spills.

• Allow the engine to cool fully before opening the cooling system.
• Drain or disconnect the drain line and unbolt the retaining hardware.
• Swap the old tank for the PPNZQAUT 603-844, then reconnect hoses and secure bolts.
• Refill coolant to the correct level and check for leaks; follow proper disposal for old coolant.

Why choose this aftermarket replacement over a used or OEM part?

An aftermarket replacement can deliver OEM-like fit and performance at a lower cost than a new factory part and avoids the uncertainty of used tanks that may have hidden cracks or contaminants. PPNZQAUT’s 603-844 is manufactured to meet expected durability for the application while offering immediate availability.

• Cost-efficient alternative to factory-priced parts.
• New, unused component with predictable service life.
• Tested for proper fit on specified Transit models prior to sale.
• Supplies the exact hose and mount layout required for direct replacement.

Who is this for? This replacement coolant reservoir is intended for owners and mechanics of 2015–2019 Ford Transit vans (150/250/350/350 HD) powered by 3.2L, 3.5L or 3.7L engines who need a reliable, new overflow tank that mirrors the original BK2Z8A080B layout. Choose this PPNZQAUT 603-844 tank if you want a straightforward direct-fit aftermarket option to restore the cooling system’s expansion and recovery function while avoiding the cost and lead time of some OEM parts.