📋 Quick Facts
Time
60-90 minutes
Difficulty
Moderate
Tools
4 tools needed
Cost
$60-280 per car
Wiper motors fail from worn brushes, stripped park-switch gears, or burned windings (often after running them on ice). Replacement requires removing the cowl panel below the windshield to access the linkage and motor.
🛠 What You'll Need
- Replacement wiper motor (matched to vehicle) (wiper motors on Amazon)
- Wiper arm puller (wiper arm puller on Amazon)
- Plastic trim removal tool kit (avoid breaking clips) (plastic trim tools on Amazon)
- Socket set with 10mm and 13mm (socket set on Amazon)
⚠ Electrical safety: disconnect the battery firstAnytime you work near wiring harnesses, connectors, or modules, disconnect the negative battery terminal first. Modern cars route airbag, BCM, and module power through the same harnesses. A bumped connector with power live can blow a fuse, trigger an airbag fault, or fry a control module.
💡 Use plastic trim tools, not screwdriversAlmost every panel on a modern car is held by hidden plastic clips. A flathead screwdriver will snap them in half - leading to rattles and panels that refuse to sit flush. A $10 plastic trim tool kit pops clips out without breaking them. Worth every penny.
✅ Before You Start - Checklist
- Park on level, solid ground (no slopes, no soft dirt)
- Battery negative terminal disconnected and isolated
- All tools and parts on hand BEFORE you begin
- Owner's manual nearby for torque specs and locations
- Safety: gloves, eye protection, hood propped open if needed
📝 Step-by-Step Instructions
- Disconnect the negative battery terminalWiper circuits share fuses and grounds with the BCM and airbag. Kill power before unplugging.
- Mark the wiper arm position on the windshield with tapeYou will need to reinstall the arms at the exact park position or they sweep crooked.
- Pop the small caps at the base of each wiper arm and remove the 13mm nutSome cars use 14mm or 17mm. Set the nut aside.
- Use a wiper arm puller to lift each arm off the splined shaftWiper arms seize on the splines after years - prying with a screwdriver will damage the cowl and rarely works. The puller is $15 and worth it.
- Remove the cowl panel clips and screws below the windshieldPlastic trim tools to pop clips. Note the location of any rubber gaskets that need to seat back perfectly.
- Lift the cowl panel up and out (may need to pop wiper washer hoses)Tag each hose with painters tape so it goes back to the same nozzle.
- Locate the wiper motor bolted to the linkage frame underneathUsually 3 bolts hold the motor to the linkage cross-bar.
- Unplug the wiper motor connectorPress release tab and pull straight. Do not pull the wires.
- Disconnect the motor crank arm from the linkageA 13mm nut on the crank arm splined shaft. Pry the arm off with a small puller or carefully with a screwdriver.
- Remove the 3 motor mounting bolts and lift the motor outNote orientation. New motor must go in the same way.
- Install the new motor with the crank arm in the park position (motor will be in park when you receive it new)If the motor was cycled during testing, run it briefly with battery power to return it to park before installing.
- Bolt the motor in, reconnect linkage, plug in the connector, reinstall the cowl, reinstall wiper arms at the marked positions, reconnect battery, and test all wiper speeds and the park functionCycle through Low, High, Intermittent, and Off. Wipers must return to the same park position every time.
✅ After You Finish - Verify Checklist
- No tools left in the engine bay, doors, or under the car
- Test every function of the system you worked on
- Look for leaks, loose wires, or rattles after a short test drive
- Record the date and mileage in your service log
- Recycle or properly dispose of the old part
🔗 Related Guides
❓ Frequently Asked Questions
How much does a shop charge to replace a wiper motor?
$220-500 per car at a dealer, $150-350 at an independent shop. The motor runs $50-180 aftermarket, $150-380 OE.
How do I know it is the motor and not a fuse or switch?
Check the fuse first (1 minute, $1 fix). Then test the multifunction switch by jumping the connector at the switch. If the motor connector has 12V on all speeds but the motor does not run, motor is dead.
Why do my new wipers park in the wrong spot?
The motor was not in the park position before you bolted on the crank arm. Disconnect, run motor briefly, let it stop on its own, then reattach the arm at the marked windshield position.
Should I replace the wiper linkage at the same time?
If the linkage bushings are sloppy or one wiper lags behind the other, yes. Combo kits with motor and linkage are common and save labor.
Will my new motor have intermittent function?
Yes if matched to vehicle - intermittent is controlled by the switch and BCM, not the motor. If intermittent does not work after replacement, check the switch.
Can I replace just the rear wiper motor the same way?
Same concept, but the rear motor is usually behind the inner liftgate trim panel. Much smaller motor, $20-80 part, 45-60 minutes.