Keystone CH1253100 Radiator Support Side Rail Passenger Side Steel OEM Replacement

The Keystone CH1253100 is an OEM-style replacement radiator support side rail designed for the passenger (right) side of the Jeep Wrangler JK. Constructed from steel, this direct-fit side rail restores the structural integrity of the front-end radiator support assembly after collision damage or corrosion, helping to properly secure the radiator and maintain correct front-end geometry.

The radiator support side rail plays a critical role in the front-end structure — holding the radiator in its correct position and protecting it from road vibration and impact. A damaged or compromised rail can allow the radiator to shift, leading to coolant leaks, overheating, and costly engine damage. Replacing it promptly with an OEM-quality part restores proper function and prevents further damage.

Key Features:

• OEM-style fitment — direct replacement that installs without modification
• Steel construction for durability and structural strength
• Passenger side (right) placement
• Replaces OEM part number 55395350AJ
• Partslink number: CH1253100

This part is a Keystone Automotive collision replacement component, engineered to meet OEM fit and finish standards for a straightforward repair.