🔧 Maxima - Serpentine Belt Replacement

The serpentine belt drives key accessories like the alternator and A/C compressor. On your Maxima, belt tension is held by an automatic tensioner, so the job is mostly about safely accessing the belt, releasing tension, and routing the new belt correctly.

Difficulty Level: Intermediate | Estimated Time: 0.8-1.5 hours

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⚠️ Safety & Precautions

• 🛑 Work on a cool engine; keep hands clear of pulleys and fans.
• 🛑 Support the Maxima with jack stands; never rely on a floor jack alone.
• 🛑 Keep fingers out from between the belt and pulleys while releasing the tensioner.
• 🛑 Battery disconnect is not required, but keep the key away from the car so no one can start it.

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 2-ton minimum)
• Jack stands (rated 2-ton minimum)
• Wheel chocks
• Safety glasses
• Mechanic gloves
• 21mm socket
• Breaker bar (1/2")
• Torque wrench (1/2")
• 10mm socket
• Ratchet (3/8")
• Trim clip remover
• 14mm box wrench
• 17mm socket
• Flashlight

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Serpentine belt - Qty: 1

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📋 Before You Begin

• 🅿️ Park on level ground, shift to P, and set the parking brake.
• 🧱 Chock the rear wheels with wheel chocks.
• 📷 Have your phone camera ready to take a clear picture of the belt routing before removal.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Lift the right front corner safely

• Use a breaker bar (1/2") with a 21mm socket to loosen the right-front wheel lug nuts about 1/2 turn while the tire is still on the ground.
• Use a floor jack at the proper front jack point and raise the car.
• Place jack stands under the proper support point and lower onto the stands.
• Remove the lug nuts with a 21mm socket and take the wheel off.

Step 2: Remove the right-front splash shield/under cover for access

• Use a trim clip remover to pop out the plastic push-clips.
• Use a 10mm socket and ratchet (3/8") to remove any 10mm bolts holding the splash shield/under cover section.
• Pull the shield aside to expose the front of the engine and belt area. Use a flashlight to confirm you can see the belt and tensioner.

Step 3: Document the belt routing

• Use a flashlight and take a clear photo of how the belt wraps around each pulley.
• Photo first saves a big headache later.

Step 4: Release the automatic belt tensioner

• Find the belt tensioner near the belt run (it has a spring-loaded arm and a pulley).
• Option A (common on Nissan): Put a 14mm box wrench on the tensioner’s hex boss.
• Option B: Put a 17mm socket and breaker bar (1/2") on the tensioner pulley center bolt.
• Rotate the tensioner smoothly to relieve belt tension, then slide the belt off one easy-to-reach smooth pulley first.
• Slowly let the tensioner return to its resting position. Do not let it snap back.

Step 5: Remove the old belt

• Pull the belt out from around the remaining pulleys by hand.
• Inspect pulleys for wobble, rough bearing feel, or cracks. (If a pulley feels gritty when spun by hand, it may need replacement.)

Step 6: Route the new belt correctly

• Compare the new belt to the old one to confirm length and rib count match.
• Route the new belt around the pulleys following your photo, making sure the ribbed side sits fully in the ribbed pulleys’ grooves.
• Leave the easiest-to-reach pulley for last (usually a smooth idler or the alternator depending on access).

Step 7: Apply tension and seat the belt

• Use the 14mm box wrench (or 17mm socket with breaker bar (1/2")) to rotate the tensioner again.
• Slip the belt onto the final pulley, then slowly release the tensioner.
• Double-check that the belt is centered on every pulley and that no ribs are hanging off an edge.

Step 8: Reinstall splash shield and wheel

• Reinstall the splash shield/under cover using the 10mm socket and ratchet (3/8"), then reinstall push-clips with the trim clip remover (press clips in by hand once aligned).
• Put the wheel back on and hand-start the lug nuts.
• Lower the car off the jack stands using the floor jack.
• Use a torque wrench (1/2") with a 21mm socket to tighten lug nuts in a star pattern: Torque to 113 Nm (83 ft-lbs).

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✅ After Repair

• 🔍 Before starting, do one last visual check that the belt is fully seated in every groove.
• 🚗 Start the engine and watch the belt for 30–60 seconds (from a safe distance). It should run smoothly with no wandering or squealing.
• 🎧 If you hear chirping/squealing, shut it off and re-check belt alignment on every pulley.

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💰 DIY vs Shop Cost

Shop Cost: $180-$350 (parts + labor)

DIY Cost: $30-$80 (parts only)

You Save: $150-$270 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.8-1.3 hours.

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🎯 Ready to get started?

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