My Car Leaking Water On The Passenger Side - Service Information in Shingle Springs, CA

If a puddle of liquid has formed in the passenger footwell of your car, how it got there can be a real mystery. Chances are, there's a perfectly reasonable explanation for this surprisingly common problem. Let us help at Shingle Springs Subaru! Below, find out what could be the source of your passenger side puddle woes. It could be the elements leaking into your vehicle, or a mechanical problem under the hood.

Leaks can form behind the dashboard, causing water to enter the cabin and collect in the passenger footwell

4. Rainwater Getting In Through Bad Door/Window Seals

Ever noticed how quiet things get inside your car when you shut the door? That's thanks, in part, to the seals. Black rubberized material called weatherstripping lines your car's doors and windows so the rain and wind can't get in while you're driving. However, this material can degrade over time and eventually allow water to seep into the cabin. Take a close look at your vehicle's black rubber weatherstripping. Water can trickle in past window seals, into the door panel and then into the cabin where it can cause water damage, promote mold growth and other undesirable consequences.

Seals and weatherstripping can sustain physical damage, but they're more likely to wear out, become brittle and crack due to damage from the sun's heat and UV rays. If you see any damage or signs of water leakage, you'll want to get the offending weather stripping replaced.

These floor mats have been left to dry in the sun after an interior leak

3. Leaking Sunroof Tray

If your car is equipped with a sunroof, that glass panel will also have weatherstripping that can similarly degrade. What's more, the sunroof tray that holds the sunroof and its mechanisms is designed to drain water away. In the event that any water leaks past the sunroof (or its left ajar in the rain), it collects in the sunroof tray where special drains allow water to drain out the bottom of the vehicle harmlessly. However, if these drains become clogged with debris, any rain that gets into the sunroof tray may backup and leak into the cabin.

While you might be able to trace the evidence of water in your car to the sunroof or window, it could be that the water is coming from the vehicle itself.

2. Leaking Heater Core

A puddle of liquid in your car's interior can be mysterious, but if it's not water, it's probably engine coolant. Coolant is typically colored green, orange or pink and has a sweet aroma. In fact, the smell of coolant has been compared to that of maple syrup. If you've got a puddle forming on your car's interior that doesn't appear to be due to rain getting in, you might give the puddle a whiff (ideally when nobody's looking). If it smells sweet or is brightly colored, the car's heater core may be leaking.

This new heater core is ready to replace an old one that had sprung a leak

To warm the air that enters the cabin when you turn on the heater, piping-hot engine coolant is diverted to the heater core. The heater core is a system of fins that spreads the coolant out over a large surface area -- not unlike your car's radiator. The blower fan forces air across the heater core, warming it before it comes through the climate vents. If this heater core becomes damaged or corroded, it could leak. When it leaks, its position right behind the dashboard means you may find a puddle of coolant in the passenger's footwell.

Because engine coolant is vital to the safe operation of your car, head to Shingle Springs Subaru for a repair right away if you suspect a coolant leak on your car.

1. Clogged Air Conditioning System Drain

If it's not the heater core leaking, another component that could potentially develop a leak is the A/C evaporator. Did you know that the air conditioning system in your car does more than just blow cool air through the vents? That provides an immediate feeling of relief, but the A/C system is also helping to pump heat out of the cabin.

As the A/C evaporator draws heat out of your car, it also collects humidity. Typically, this condensation merely drips out of the car onto the road as you drive. If you've ever noticed a car dripping some liquid from the undercarriage on a hot day, it's likely just condensation. However, just like the drains for the doors and sunroof, the A/C evaporator drain can become clogged. When the drain backs up, water will collect behind the dashboard and eventually leak into the front footwells.

Luckily, fixing this problem is usually fast and easy for our technicians -- sometimes it's as simple as lifting the car, finding the A/C system drain and removing the obstruction with some compressed air or other tool. Don't get cold feet because your car's leaking onto the passenger's side floor mats! Get it fixed instead by the talented, friendly team of experts at Shingle Springs Subaru.

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Shingle Springs Subaru

4045 Wild Chaparral Dr
Directions Shingle Springs, CA 95682

  • Sales: 530-677-8771
  • Service: 530-677-8771
  • Parts: 530-677-8771