Honda CR-V sunroof care
The CR-V's signature is a soaked footwell from a clogged sunroof drain, with one catch: owner reports put the right-front drain exit close to the cowl area, so a sunroof-drain leak and a cowl leak can look identical.
Clogged drains
Four corner drains; the tubes are a slip fit with no clamp, so they clog and can also slip off their fittings. Fronts run down the A-pillars and exit behind the front wheels; rears run down the C-pillars. Owner reports describe the passenger-side front drain as the awkward one to reach. Be careful with descriptions that put a sunroof drain "behind the heater box": that is where the air conditioning condensate hose lives, and the two are easy to confuse. A sunroof drain runs down the pillar, so if a repair is heading for the dash rather than the pillar, stop and confirm which hose is actually being chased. Clear gently with a soft brush and confirm with water.
The slip-fit tubes are easily blown off their fittings deep in the pillar. Soft brush and water only.
What Honda has said, and what it has not
Honda has never published a bulletin naming a cause or a repair for CR-V roof-area water. What it did instead is ask its dealers, repeatedly, to stop and report cars before touching them. That is worth knowing, because it tells you Honda was still looking for the cause rather than issuing a fix.
The engineering request, AER19020, covers certain 2018-2019 CR-Vs "with a customer complaint of a water leak from the roof area including the moonroof". Honda asked dealers to collect information before attempting a repair of any kind, and qualified it on three conditions: the VIN prefix, that the source of the leak can actually be identified, and that no repair has been attempted yet.
It went out more than once, and the VIN prefix moved:
- The first message, sent 25 February 2019, for vehicles whose VIN begins 2HG.
- A second message, sent 24 May 2019, repeating the request for vehicles whose VIN begins 2HK.
Two prefixes three months apart is the useful signal here. It is not proof of a widespread defect, and we are not going to present it as one, but it does show Honda kept looking across more than one build.
A further Honda request, sent 6 July 2020, is a different investigation altogether: a windshield water leak on certain 2019-2020 CR-Vs, VIN prefix 2HK, with 2019 model year vehicles qualifying only after VIN 2HKRW5...KH420497, and only where the car has not been in a collision.
That matters for diagnosis. A wet front footwell or a damp A-pillar on a CR-V of this era has at least two documented candidates that are not the moonroof drains, and Honda itself was investigating one of them. Rule out the windshield before pulling trim to chase a drain.
When it is not the sunroof
- Cowl / plenum drain. Because the right-front drain dumps into the plenum, leaves there mimic a sunroof leak exactly. The passenger-side cowl drain is a small hole near the fender weld, often hidden by grime.
- A/C condensate drain. Wet floor with A/C use, not rain.
- Windshield bond / door vapor barrier. Both surface at the A-pillar or door sill.
Sources
- Honda AER19020C, engineering request for information, 2018-2019 CR-V water leak from the roof area. States no cause and no repair (NHTSA)
- Honda dealer message, sent 25 February 2019, same request, VIN prefix 2HG (NHTSA)
- Honda dealer message, sent 24 May 2019, same request, VIN prefix 2HK (NHTSA)
- Honda dealer message, sent 6 July 2020, a separate investigation into a windshield water leak on 2019-2020 CR-Vs (NHTSA)