YHB Transmission Cooler Lines for Jeep Grand Cherokee 1999-2003 4.0L — 2-Piece Direct-Fit OEM-Equivalent

These two transmission cooler lines are engineered as OEM-equivalent replacements for Jeep Grand Cherokee models built from 1999 to 2003 with the 4.0L engine. Each kit includes both lines required at the radiator connection, matching original mounting points and hose ends so you can restore proper fluid routing without modifying brackets or fittings. The set carries multiple cross-reference part numbers, making it straightforward to verify compatibility against your vehicle’s existing parts.

Will these cooler lines fit my 1999–2003 Jeep Grand Cherokee?

Yes — the YHB kit is designed specifically for Grand Cherokee 4.0L models from 1999 through 2003, including Laredo, Limited, Overland, and Sport trims. To be certain, compare the part numbers on your old lines to the cross-references provided with this kit.

• Compatible model years: 1999, 2000, 2001, 2002, 2003.
• Fits trims: Laredo, Limited, Overland, Sport (4-door).
• Cross-reference numbers included: 52079753AB, 52079753AA, 52079432AC, 52079432AB, 1712103.

How difficult is installation and what tools will I need?

Installation is intended to be a straightforward direct replacement that uses the factory mounting points. A basic set of hand tools and some light mechanical experience are usually enough; the job commonly takes less time than replacing the entire radiator or cooler assembly.

• Basic tools: wrenches, pliers, and possibly a flat screwdriver for clips.
• Typical steps: drain transmission fluid, remove old lines, install new lines, secure fittings, refill fluid.
• No special modifications or welding required — direct-fit hoses and connectors.

What materials and durability can I expect from these lines?

These cooler lines are manufactured to meet functional standards for engine bay fluid lines, with corrosion-resistant ends and reinforced tubing where needed. They are built to withstand the thermal and pressure conditions typical of transmission fluid circulation, while matching original routing to reduce stress points.

• Reinforced tubing designed for transmission fluid service.
• Corrosion-resistant fittings and mounting points for longevity.
• Supplied in a two-piece set to replace both radiator connections at once.

Which part numbers should I compare before purchasing?

Check the part numbers stamped or labeled on your existing cooler lines and match them with the cross-references included with this YHB kit to ensure an exact replacement. Multiple part numbers are listed because several OEM revisions exist across those model years.

• Included cross-reference numbers: 52079753AB, 52079753AA, 52079432AC, 52079432AB, 1712103.
• If your used lines carry any of these numbers, this kit is a proper replacement.
• When in doubt, compare connector shapes and bracket locations visually.

Who is this for: This YHB 2-piece transmission cooler line set is aimed at owners and mechanics servicing Jeep Grand Cherokee 4.0L models from 1999–2003 who need a reliable, direct-fit replacement. It's a practical choice for restorations, routine maintenance, or when repairing leaks and damaged lines. If you want an OEM-style repair without custom work, this kit supplies the two radiator-facing lines and compatible fittings necessary to get the cooling circuit back to factory layout.