How to change the rear windshield wiper arm?

To change the rear windshield wiper arm, you remove the old arm from the motor shaft and install a new one, securing it with the base retaining nut and aligning it so the blade sits properly in the parked position.

In detail, rear wiper arms are mounted on a drive spindle and can vary by model. The typical process involves accessing the base cap to reveal the retaining hardware, removing the nut or clip, carefully pulling the arm off the spindle, and then fitting the new arm with correct orientation and torque. After installation, you’ll reinstall or replace the blade and test the wiper to ensure proper contact and park alignment.

What you'll need

Gather the right parts and tools before you start. Because wiper arms are model-specific, confirm you’re buying the correct arm for your vehicle and note any special installation steps in the service manual.

• Replacement rear wiper arm for your vehicle (check OEM or reputable aftermarket).


• Socket wrench or spanner to remove the retaining nut (common sizes range from 10–14 mm, depending on model).


• Flat-head screwdriver or plastic trim tool to remove any protective caps.


• Torx or Phillips screwdriver for retaining screws if used.


• New rear wiper blade (optional but recommended if blade is old or difficult to attach).


• Penetrating oil (e.g., WD-40) for stubborn nuts.


• Torque wrench or standard wrench to torque the nut to spec (check the vehicle manual).

With the right replacement arm and tools on hand, you’re ready to move to the removal step.

Step-by-step removal and installation

Follow these steps to safely remove the old arm and install the new one. Note that some models vary in the exact hardware, so consult your vehicle’s manual for torque specs and any special steps.

1. Park the car, turn off the ignition, and if possible, place the wiper in its parked position to expose the base.


2. If a blade is attached, release it from the arm by pressing the blade release tab and set the blade aside to avoid interference.


3. Gently pull the wiper arm away from the glass to gain clear access to the base where it attaches to the motor.


4. Remove the protective cap at the base to reveal the mounting hardware.


5. Remove the retaining nut or clip. For some models there may be a small pin or a screw that holds the arm in place.


6. Carefully pull the arm straight off the spindle. If it resists, apply penetrating oil and work it gently, avoiding bending the spindle.


7. Inspect the spindle for corrosion or damage. Clean the surface and apply a light coat of grease if recommended by the vehicle manufacturer.

With the old arm removed, you’re prepared to install the new arm.

Installing the new rear wiper arm

Install the new arm with attention to alignment so the blade clears the glass evenly and lands in the correct parked position.

1. Slide the new arm onto the spindle, aligning any marks or the spline orientation with the drive shaft. Some arms have a specific orientation when the blade is in the parked position.


2. Reconnect the retaining nut or pin. If there is a protective cap, replace it to seal the base.


3. Tighten the mounting hardware to the vehicle’s torque specification. Avoid overtightening, which could damage the spindle or arm.


4. If you’re reusing the blade, reattach it to the new arm using the correct adapter or clamp. If you’re installing a new blade, install it per its instructions.


5. Lower the arm to rest on the glass and run a test: turn the wipers on and off to verify smooth movement and proper parking.

After installing, verify the arm sits correctly in park and the blade clears the window evenly without streaks.

Tips and troubleshooting

• Use the exact replacement arm for your vehicle model and year to ensure correct fit and park position.


• If the arm is stubborn, apply a small amount of penetrating oil to the base and gently wiggle the arm free. Do not force it.


• Inspect the blade condition; a worn blade can cause poor wiping even with a correctly installed arm.


• Test in different modes (spray, intermittent, etc.) to confirm consistent performance.

If the wiper still doesn’t park correctly or the blade doesn’t clear, recheck alignment, fasteners, and the blade connection or seek professional help.

Summary

Changing a rear wiper arm is typically straightforward but model-specific. It involves safely removing the old arm from the motor spindle, installing a correctly matched replacement, and ensuring proper alignment for optimal wiping and accurate parking. With the right arm and careful installation, you’ll restore rear visibility quickly.