How do I know my rear windshield wiper size?
Rear wiper size is the length of the blade that fits your car; the fastest way to know it is to check the blade currently on the car, refer to the owner's manual, or look up your vehicle in a parts catalog by year, make, and model.
In this guide, you’ll learn practical steps to identify the correct size, what to measure if labels are missing, and how to verify compatibility before purchasing a replacement blade for your rear window.
Ways to determine the correct size
Several reliable methods can confirm the rear wiper size without guesswork. Use whichever is most accessible to you: check the blade itself for markings, consult your vehicle’s documentation, or search an online parts catalog by year, make, and model.
- Inspect the current blade on your vehicle for size markings or a part number on the blade packaging or the blade's base.
- Consult the owner’s manual, a dealership service department, or the vehicle manufacturer’s official parts catalog using your year, make, and model.
- Use an online automotive parts retailer that offers a compatibility search by entering your vehicle information.
Be sure to verify the results against your specific trim level, as some models share a base body but use different rear wiper assemblies.
Check the blade itself for markings
Many rear wiper blades have the length printed on the blade's side or on a label near the hinge. If you can’t read it, note the packaging details or take a photo for reference when shopping.
Refer to official sources by model
The owner’s manual or the manufacturer’s parts portal will list the exact blade size for your year and trim; ensure you select the rear blade and not a front blade.
Measuring the blade when the label is missing
If you can’t find a label or you’re replacing a used blade whose size label wore off, measure it directly. This is especially useful for older or less common models.
- Fully extend the blade on a flat surface and measure from tip to tip along the blade’s outer edge to get the blade length in inches or millimeters.
- Take the measurement with the blade removed and lying straight, not along the curved glass, to avoid overestimating the size.
- If your car’s rear wiper uses a nonstandard mounting, you may need the entire blade assembly length rather than just the rubber blade.
Always cross-check your measurement with a reliable parts catalog to confirm compatibility before purchasing.
Tools and technique
Use a flexible measuring tape or ruler. Measure the straight, uncurved span of the blade; many retailers list sizes in inches (for example, 10", 12", 14").
Buying and installing: compatibility matters
Proper fit hinges on the mounting system and length. The following tips help ensure a correct purchase and easy installation.
- Rear wiper blades come with different connector types (for example J-hook, straight/slim pin, or side-pin). Match the connector to your wiper arm, or buy a compatible adapter if needed.
- Check the blade length recommendation for your vehicle’s year, make, and model; using a blade that’s too long or too short can hinder visibility and cause streaking.
- Consider blade quality and weather performance, especially in regions with snow, ice, or heavy rain.
After installation, test the wipe at multiple speeds and angles to ensure full contact along the glass and to avoid streaks or chatter.
Installing and testing tips
Follow the replacement blade’s instructions for removal and installation; typically, you release a small tab or twist the blade to detach from the arm, then attach the new one until it clicks securely in place. Test at low and high speed with a dry and wet windshield.
Where to source reliable size information
You can confirm size through several reputable sources that keep up with current models and parts numbers.
- Manufacturer official parts site or the dealership parts desk, which lists blade sizes by vehicle.
- Reputable auto parts stores that provide compatibility checks at purchase or online.
- Vehicle-specific online catalogs that allow you to enter year, make, model, and trim to display correct rear blade options.
When in doubt, call the parts department or use an in-store compatibility tool to verify fit before buying.
Live support and verification
Many retailers offer chat or phone support to confirm the correct blade size for your exact vehicle configuration. Have your VIN handy for precise verification if possible.
Summary
Determining your rear wiper size is a straightforward process that starts with checking the blade itself or your vehicle documentation and can be confirmed with online catalogs or a dealership. Measure if necessary, verify the connector type, and ensure the chosen blade matches your year, make, model, and trim. Proper sizing helps ensure clear visibility and a streak-free wipe in all weather.
How do I find out what wiper blade I need?
You can also find the right replacement wiper blade by looking in your car's owner manual, on the side of the old blade or potentially even on the box of your new blades – just look for your cars make or model on the packaging or leaflet.
Are all rear wiper blades the same size?
All blades are made of similar material. However, rear wiper blades tend to be much shorter than front blades. Front blades may both be 22″ or they are 26″ and 17″ but the the rear blade will then be 10″ or 12″ or 14″ and so forth.
How to check rear wiper size?
You can also find the wiper blade size within your vehicle's owner's manual. If you don't have a printed copy of this, they can often be found online.
How do you tell what size wipers you have?
What Size Windshield Wipers Do I Need?
- Consult your owner's manual.
- Measure your existing wiper blades.
- Dealership or manufacturer website: Often, car manufacturers' websites or official dealerships will have parts databases where you can enter your car's make, model, and year to find out specifics about wiper blades.
