Diff breathers are an essential accessory for your 4WD vehicle to prevent water from entering in different housings. Installing diff breathers help you save more money in the long run by preventing damage and expensive repairs to your vehicle's critical parts.
The diff breather prevents the buildup of vacuum that sucks the water past your axle seals. It also equalises the air pressure flowing in and out of your diff which is important if you have fitted an air-activated diff lock.
