2021 Ram 1500: Back window leaking
Common wear/failure (not a recall)
Symptoms
Owners of the 2021 1500 report: back window leaking. CarComplaints.com lists 4 owner complaints, average mileage 40,600 miles.
NHTSA has 26 owner complaints for the 2021 1500 in this area. Examples:
- NHTSA complaint ODI #11769940 (filed 10/08/2026): “The contact owns a 2021 ram 1500. the contact stated that while driving 60 mph, the hvac system was activated to defrost the window, and there was a failure with the heater core which caused the windshield to become foggy with chemical steam inside the cabin o…”
- NHTSA complaint ODI #11760353 (filed 08/28/2026): “I purchased a new 2026 ram 1500 rebel crew cab 4x4 from the john heister dodge ram dealership, in [xxx] on xxx. the following day, i day i was notified of an open safety recall (nhtsa 26v-531) affecting the vehicle's rear visibility/backup camera system, which…”
Likely causes
Sources do not establish a single root cause; diagnosis is needed. Owner-reported fixes are listed below.
Fix, in plain English
Most common owner-reported solutions on CarComplaints.com: manufacturer or main dealership to replace or fix leakage (1 reports) manufacturing defect on rr window/repl wndw/cover damages (1 reports) place new seals to fix leak (1 reports) windows /. Check for open recalls and extended warranty coverage with a dealer before paying out of pocket.
DIY difficulty: Moderate
Leaks can often be traced with a water test and resealed; glass replacement is a pro job. (Our assessment.)
Cost
CarComplaints.com owners report a typical repair cost of about $850 (owner-reported average, not a quote).
Typical parts (search links, no affiliate codes)
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