How to Measure a Windshield Wiper Arm

Introduction

Measuring the length of your windshield wiper arm is crucial to ensure that you purchase the correct replacement blades. The wiper arm is the metal part that connects the wiper blade to the vehicle's body. It is important to measure the arm accurately to obtain the appropriate blade length and avoid any fitment issues. This article will guide you through the steps of measuring a windshield wiper arm with precision.

Step 1: Identify the Wiper Arm

Locate the wiper arm on the vehicle. It is typically a long, thin metal piece that extends from the base of the windshield to the center of the wiper blade.

Step 2: Measure the Exposed Arm

With the wiper blade in the upright position, use a measuring tape to determine the length of the wiper arm that is exposed beyond the base of the windshield. Measure from the center of the wiper arm's pivot point to the tip of the exposed arm.

Step 3: Add the Blade Length

Next, you need to account for the length of the wiper blade that overlaps the wiper arm. This varies depending on the blade design. Refer to the manufacturer's specifications or measure the blade length directly. Add this length to the exposed arm measurement from Step 2.

Example: If the exposed arm length is 15 inches and the blade overhangs by 3 inches, the total wiper arm length is 15 + 3 = 18 inches.

Step 4: Determine the Center-to-Center Distance

In some cases, the wiper arm length is specified as the distance between the center of the pivot point and the center of the wiper blade. To measure this, use a ruler or measuring tape to determine the distance from the center of the pivot point to the center of the wiper blade hole.

Step 5: Serial Number

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Subtitle: Troubleshooting Measurement Issues

Issue: Curved Wiper Arm

For curved wiper arms, follow the same measuring steps as for straight arms. However, measure along the center curve of the arm.

Issue: Wiper Arm Installed Incorrectly

If the wiper arm is not installed correctly, it may affect the measurement. Ensure that the wiper arm is fully seated and secure on the vehicle's body before measuring.

Issue: Different Wiper Arm Styles

Different vehicles may have different wiper arm styles. Consult your vehicle's owner's manual or a mechanic to determine the correct measurement method for your specific vehicle model.

Conclusion

Measuring a windshield wiper arm is a simple but essential task to ensure that you purchase the correct replacement blades. By following the steps outlined in this article, you can accurately determine the length of your wiper arm and avoid any fitment or performance issues. Remember to consult your vehicle's documentation or a qualified mechanic if you encounter any problems or uncertainties during the measurement process.