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Rain Sensor Module

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GenuineXL 61-31-8-370-747 Temperature Sensor for Heated Windshield Washer Nozzles (Thermo Switch) - Replaces OE Number 61-31-8-370-747
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Warranty : 24-month limited warrantyAnticipated Ship Out Time : Same day - 1 business dayQuantity Sold : Sold individually
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Rain Sensor Module Guides

Buying Recommendations for Your Rain Sensor Module

Modern cars have all sorts of advancements that you don't see from vintage cars, such as the dashboard computer that gives you error messages every time your check engine light turns on. The rain sensor module is one of those many advancements you nowadays expect from turn-of-the-millennium vehicles. It's a module that allows your engine to detect rain, gauge humidity, measure rainfall intensity, and the like to activate your wipers or protect itself from the inclement weather automatically.

The Dos and Don'ts When Buying Rain Sensor Module

Rain detectors can detect rain and water far beyond what your humidity sensor can detect. With that in mind, here are the things you should do and not do when shopping for one of these state-of-the-art sensors.


  • When buying a sensor, look for a direct fit product with at least a three-year warranty on it. This will ensure an optimum investment on your part. Expect to get a module composed of a female connector gender, a rectangular connector shape, and a blade terminal type of construction.
  • As much as possible, buy OEM so that you won't have to match specs with the module you're buying and the busted module you're replacing. Even universal-fit modules indicate the models it's supposed to fit.
  • Also remember that rain sensors typically use internal reflection infrared light technology that's beamed at a 45-degree angle into the windshield from your interior to detect any sort of wetness on the glass.
  • Do a price versus value comparison. Prices for these machines range from more than $100 to more than $200 depending on the module itself and the make, model, and year of car it's made for.
  • You can also avail of the more advanced digital sensors that allow you to adjust the sensitivity (whether it should turn on during light rain or just heavy downpours) if you so wish, but that will naturally cost you more.
  • Feel free to purchase an analog output module instead if you want, because they perform well too. They jump in value drop by drop until they saturate at around the eighth drop, triggering your windshield on.


  • DON'T purchase rain sensors that are notorious for malfunctioning or keeping your windshield wiper moving even when there's little to no rainfall at all. There are also some faulty sensors that don't turn its windshield triggers off long after the rain has passed. You can check user reviews to spot "red flags" when sensor shopping.
  • DON'T install a mismatched, incompatible rain sensor replacement with your OEM wiper. This can result in malfunctions, such as the wiper going low speed on auto detect even when it's set at high speed. At worst, you might end up with a wiper you have to turn on manually anyway, rendering the module moot.
  • DON'T install non-OEM windshields on your car with a wiper rain sensor. Certain infrared sensors stop working when you install non-OEM windshield glass on your car. The infrared light has trouble detecting rain on certain types of aftermarket windshields.

Brief History

Although the rain sensor module seems like brand new technology that only became popular around the 1990s, it's actually been around since 1958.A certain popular car manufacturer experimented with a water-sensitive switch that triggered motors on its vehicle to raise the convertible top and raise open windows whenever rainfall came about.

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