This article explains how to adjust the windshield wiper arm tension on your vehicle to ensure the wiper arm applies the correct pressure. Proper tension allows the wiper blade to clean your windscreen effectively, preventing streaks and missed spots.

Insufficient wiper arm pressure can cause the center of the blade to miss sections of the windscreen, while excessive pressure may lead to chattering noises or damage to the wiper blade edges.

Several factors can cause your wiper arm to lose tension, including:

* Rust or corrosion on the arm or pivot

* Physical damage or vandalism

* Age-related wear, such as a stretched or weakened spring

If your wiper arm lacks pressure because of age, rust, or corrosion, try spraying a lubricant like WD40 on the spring and pivot point to restore smooth movement and improve tension.

To measure wiper arm tension accurately, use a specialized pressure gauge tool. The ideal pressure is approximately one ounce per inch of blade length, ensuring even contact across the windscreen.

If the spring is stretched or weakened, the wiper arm may need replacement. Contact your vehicle manufacturer for the correct part. Alternatively, you can carefully bend the end of the wiper arm where it attaches to increase tension and improve pressure.

After adjusting the wiper arm tension, pair it with a fresh set of wiper blades to get the best results. Even a perfectly tensioned arm won’t perform well with a worn or hardened blade. Browse our full range of wiper blades — all sized to fit your specific make and model — to complete the job and restore clear visibility in all conditions.