Water Intrusion & Cabin Leak Defects — California Lemon Law
Water leaking into your cabin, trunk, or electrical compartments after rain? Persistent water intrusion causing mold, mildew, or electrical damage is a serious defect covered under California’s lemon law.
Does Water Intrusion Qualify for Lemon Law?
Water intrusion defects — where rain or car wash water leaks into the passenger cabin, trunk, or under panels — substantially impair both the use and value of a vehicle. Wet carpets, mold growth, musty odors, and water-damaged electronics are all serious consequences that California’s Song-Beverly Act is designed to address.
Common Water Intrusion Defects That Qualify
- Wet carpets or floorboards after rain — often found under mats
- Water pooling in the trunk or cargo area
- Musty or mildew odors from the cabin or HVAC system
- Water damage to electronics — shorts, corrosion, or warning lights after rain
- Sunroof drains that are blocked or improperly routed causing interior leaks
- Door or window seals that allow wind-driven rain into the cabin
- Windshield or rear glass seals that leak during heavy rain or car washes
Repair Attempts for Water Intrusion
Water intrusion defects typically require 4 or more failed repair attempts or 30+ cumulative days out of service. Water leaks that damage electrical systems and create short-circuit or fire risk may qualify as safety defects under the 2-attempt threshold.
Find Your Car Brand Below
Select your manufacturer for make-specific lemon law information, NHTSA complaint data, and what you may be owed.
Water Intrusion Lemon Law — Frequently Asked Questions
The dealer says my water leak is from a clogged drain — is that a defect?
If the drain is clogging repeatedly due to a design defect (e.g., improper routing or inadequate drain sizing), it qualifies. A clog that the dealer repeatedly clears without a permanent fix is a recurring defect.
My car has mold from the water leak — does that affect my claim?
Yes, and it strengthens it. Mold from a manufacturing defect is a health hazard that substantially impairs the vehicle’s use. Document the mold with photos and request that the dealer address it in writing.
The leak only happens in heavy rain — will the dealer be able to test it?
Dealers can perform water leak tests using hoses. You can also time your service visit during or after a rain event. Multiple “no fault found” visits during dry weather still count as repair attempts toward your lemon law total.
Not Sure If Your Water Intrusion Qualifies?
Our attorneys evaluate every case for free. Under California Civil Code § 1794(d), if you win, the manufacturer pays all attorney fees.