2019 RAM 1500 Rear Window Leak: Warranty and Repair

Start by confirming the exact leak source

The repair is only reliable when the entry point is identified first. Water can travel inside the headliner, roof reinforcement, and rear cab panel before it drips, so the wet spot is not always directly below the leak. Common signs include a damp rear headliner corner, wet rear carpet, water behind the rear seats, a musty odor, or intermittent electrical problems from soaked connectors.

On trucks with a power-sliding rear window, inspect the glass frame and perimeter closely for cracks, separation, or missing sealant. Also inspect the center high-mounted stop lamp, often called the third brake light, above the rear glass. Its gasket can flatten, shrink, or allow water past the mounting surface. A loose antenna seal or an unsealed cab seam can produce similar symptoms.

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   Step 1

   1. Remove loose items from the rear seat area and dry the carpet, headliner edge, and rear storage areas. Use paper towels or absorbent towels to identify where fresh water first appears. Do not aim high-pressure water directly at seals, because that can create a leak that normal rain would not produce.

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   Step 2

   2. Have a helper sit inside with a flashlight while you run a gentle hose stream over one area at a time: first the third brake light, then the upper rear-glass perimeter, then each side of the glass, and finally the roof seams. Keep each test area separate for several minutes and mark the first point where water enters.

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   Step 3

   3. Check the rear window frame, especially around the sliding-glass opening, for visible cracks or a gap between the frame and cab. Check that the third-brake-light screws are secure and that its foam gasket is not torn, compressed, or displaced. Photograph all damage and moisture paths before authorizing repairs.

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   Step 4

   4. Repair the verified source rather than applying silicone over the outside of every seam. A failed stop-lamp gasket may need a new lamp assembly or gasket and proper sealing. A cracked rear window frame or failed perimeter seal usually requires removing and resealing, or replacing, the rear glass assembly.

Choose the repair that matches the failure

A leaking third brake light is usually the least invasive repair. A shop can remove the lamp, clean the mounting surface, replace the failed gasket or assembly, and water-test it afterward. Avoid household caulk: it can trap water, interfere with future service, and make a proper repair harder.

If water enters through a cracked rear-window frame, deteriorated perimeter urethane, or a sliding-window assembly, a qualified auto-glass shop or RAM dealer should inspect it. Rear glass removal can involve trim panels, defroster connections, and power-slider wiring. The technician should also check for water damage behind the rear seat and dry the cab thoroughly to prevent mold and corrosion.

Typical out-of-pocket costs vary with the source and local labor rates. Resealing or replacing a brake-light gasket may cost roughly $150 to $400. Rear-glass resealing or replacement can range from several hundred dollars to more than $2,000 when a power-sliding window assembly, wiring, trim, or water-damaged components are involved.

How does warranty coverage work?

The original 2019 RAM 1500 basic limited warranty was generally 3 years or 36,000 miles, whichever came first. For most trucks, that factory coverage has expired. A water leak is not normally covered by the powertrain warranty, even when the truck still has powertrain coverage.

Coverage may still be available if you bought a Mopar Vehicle Protection plan or another service contract that includes weather seals, glass-related components, or water-intrusion diagnosis. Read the contract because many plans exclude body seals, glass, trim, and consequential damage. If the truck had the same leak repaired while under warranty, bring the prior repair order to the dealer and ask whether the repair warranty, goodwill assistance, or a repeat-repair review applies.

Rear-window leaks and related complaints have been reported by some owners. Check your VIN for open recalls and review NHTSA recall and complaint data; unbrokencar.com offers a free VIN check. Recall eligibility is VIN-specific, and a leak complaint or service bulletin does not automatically create free repair coverage.

Prevent damage while waiting for service

Keep the rear cabin dry as soon as possible. Remove wet floor mats and cargo, blot the carpet, and run a fan or dehumidifier if available. Disconnecting nothing is usually necessary for a minor leak, but avoid operating power accessories if water has reached wiring, connectors, or the rear-seat area. If you find standing water, repeated electrical warnings, or a wet headliner near airbags, schedule professional inspection promptly.