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BMW Sunroof Drain Clog and Wet Floor
Water on the headliner, the A-pillar or the floor after rain, a musty smell, or wet footwells with no door-seal leak, are the sunroof drain symptoms. The repair page has no priced shop invoice. It says many drain tubes are not replaceable as a hose, and that shops clear the clog with air, wire or a brush. A sweet coolant smell with foggy windows is the heater core, not the drain.
Last updated · By BimmerQuote (how we build guides) · Costs on this page come from the linked repair pages, each citing its sources.
Rain water versus coolant
The sunroof page is specifically water after rain, on the headliner, A-pillar or floor, with a musty smell, and wet footwells when the door seal is not leaking. The heater core page is a sweet coolant smell, foggy windows, a wet passenger footwell and coolant loss, on the E90 and E92. If the carpet is wet and the coolant tank is low, start with the BMW Coolant Smell in the Cabin: Heater Core and Other Causes and Heater Core Replacement. If it happens after rain and the coolant level is steady, start with Sunroof Drain Cleaning.
The labor note says many drain tubes are non-serviceable outside body repair, and that shops clear clogs with air, wire or brushes. The page says not to force high pressure into the wrong end. There is no priced invoice, so we do not state a cleaning cost. We have not yet found real owner-reported prices for Sunroof Drain Cleaning on a BMW E90/E92/F30/F32.
Why the carpets matter
The note says to dry soaked carpets fast, because wet modules get expensive. The page does not price a footwell module, so this guide does not either. The point of the note is that the water is the urgent part, not a new drain hose.
The sunroof drain page lists water on the headliner, A-pillar or floor after rain, a musty smell, and wet footwells when the door seal is not the leak.
How much does BMW sunroof drain cleaning cost?
We have not yet found real owner-reported prices for Sunroof Drain Cleaning on a BMW E90/E92/F30/F32.
Is a wet footwell the heater core?
A sweet coolant smell, foggy windows and coolant loss point to the heater core. Rain water with a steady coolant level points to the sunroof drains.
Can the drain hose be replaced?
The repair page says many drain tubes are non-serviceable outside body repair, and that shops clear the clog instead. It also says not to force high pressure into the wrong end.
Where this comes from
Every cost on this page is pulled from these repair pages, which list the price, the forum or shop source and the details for each report. This guide adds no prices of its own.
