Mopar 55112378AI Door Window Belt Weatherstrip

Mopar Door Window Belt Weatherstrip for Ram

Replace worn window belt weatherstrip with Mopar part number 55112378AI. This door window belt weatherstrip is built for direct-fit service on select Ram trucks and helps restore the seal at the door glass opening.

Key Features

• Genuine Mopar replacement part
• Door window belt weatherstrip for the body and doors area
• Helps maintain a tighter seal along the window opening
• Fits 2018-2021 Ram 1500
• Fits 2019 Ram 1500 Classic

Detailed Description

Mopar 55112378AI is a door window belt weatherstrip designed for Ram 1500 and Ram 1500 Classic applications. It installs at the door window opening to help renew the interface between the glass and the door, supporting proper sealing and a cleaner finish around the window channel. If you are replacing a cracked, hardened, or noisy belt weatherstrip, this OE replacement part provides the correct application match for 2018-2021 Ram 1500 and 2019 Ram 1500 Classic models.

What It Helps Address

• Wind noise around the door glass
• Water intrusion at the window opening
• Worn, split, or hardened weatherstrip material
• Rattling or poor sealing at the belt line
• Visible deterioration along the door window edge

Installation Notes and Tips

Verify the vehicle year and model before installation. Compare the original belt weatherstrip to Mopar 55112378AI to confirm the correct door application and profile. Clean the mounting area thoroughly before fitting the new part so the seal seats properly along the window opening.

Quality Assurance

As a Mopar replacement part, 55112378AI is made for the specified Ram applications and follows OE-style fitment expectations for service replacement.