🔧 Tucson - Serpentine Belt Replacement

The serpentine belt (also called the drive belt) spins your accessories like the alternator and A/C. On your Tucson, you relieve the spring-loaded belt tensioner, slip the old belt off, then route and install the new belt correctly.

Difficulty Level: Intermediate | Estimated Time: 0.5-1.5 hours

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⚠️ Safety & Precautions

• ⚠️ Let the engine cool fully; keep hands away from hot parts.
• ⚠️ Keep fingers clear of the belt tensioner; it’s spring-loaded and snaps back.
• ⚠️ If you raise the vehicle, support it with jack stands; never rely on a jack alone.
• ⚠️ Do not start the engine with hands/tools near the belt path.
• 🔋 Battery disconnect is not required, but keep the key/fob away so the engine can’t be started accidentally.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Mechanic gloves
• Work light
• 3/8" drive ratchet
• 3/8" drive breaker bar
• 17mm socket
• 10mm socket
• Trim clip removal tool
• Floor jack (rated 2-ton minimum)
• Jack stands (rated 2-ton minimum)
• Wheel chocks
• Tire iron or 21mm lug socket
• Torque wrench (10-150 ft-lbs range)

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Serpentine belt (accessory drive belt) - Qty: 1

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📋 Before You Begin

• Park on level ground, shift to Park, and set the parking brake.
• Chock a rear wheel using wheel chocks.
• Open the hood and look for the belt routing diagram sticker; if it’s there, take a clear photo for reference. This prevents misrouting.
• If access is tight from above, plan to use the right-front wheel-well access method (wheel off + splash shield pulled back).

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Confirm belt routing

• Use your phone camera to take a photo of the existing belt path before removing anything.
• If there’s no sticker, sketch the routing on paper (crank pulley at the bottom is usually the largest).

Step 2: Create access (choose the method that fits)

• Top access (if you can reach the tensioner): Use your work light and position yourself at the front of the engine bay.
• Wheel-well access (more room):
  • Use a tire iron or 21mm lug socket to loosen the right-front lug nuts about 1/2 turn (vehicle still on the ground).
  • Use a floor jack to lift at the right-front jacking point, then set the vehicle on jack stands.
  • Remove the lug nuts with the tire iron or 21mm lug socket and remove the wheel.
  • Remove/peel back the front portion of the right-front splash shield: use a trim clip removal tool for plastic clips and a 10mm socket for any small bolts.

Step 3: Relieve belt tension

• Locate the belt tensioner (the spring-loaded arm with a pulley). A “tensioner” is the part that keeps the belt tight automatically.
• Install a 17mm socket on a 3/8" drive breaker bar and place it on the tensioner’s hex boss/bolt head.
• Slowly rotate the tensioner to relieve belt tension (you’ll feel strong spring force).
• Move slowly; don’t let it snap back.

Step 4: Remove the old belt

• While holding the tensioner released, slip the belt off the easiest-to-reach smooth pulley using your hand (no tools near pulleys).
• Carefully let the tensioner return to its resting position.
• Remove the belt from the remaining pulleys and pull it out.

Step 5: Inspect pulleys and tensioner

• Spin each pulley by hand and listen/feel for grinding or wobble.
• Check the tensioner pulley surface for cracks or roughness.
• If any pulley is noisy or loose, stop here—belt replacement alone won’t fix that.

Step 6: Install the new belt (route first, tension last)

• Route the new belt around the crank pulley and the grooved pulleys first, matching your photo/diagram.
• Make sure the belt ribs sit fully in the grooves (if it’s “one rib off,” it will shred).
• Leave the easiest-to-reach pulley for last.

Step 7: Apply tension and seat the belt

• Use the 17mm socket and 3/8" drive breaker bar to rotate the tensioner again.
• Slip the belt onto the last pulley, then slowly release the tensioner.
• Double-check belt alignment on every pulley with your work light.

Step 8: Reassemble (if you used wheel-well access)

• Reinstall the splash shield using the 10mm socket and trim clip removal tool.
• Reinstall the wheel and hand-thread lug nuts.
• Lower the vehicle off the jack stands using the floor jack.
• Use a torque wrench to tighten lug nuts in a star pattern to the wheel lug torque shown on your Tucson’s driver-door tire placard.

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✅ After Repair

• Start the engine and watch the belt for 20-30 seconds—it should run centered with no wobble.
• Listen for squealing or chirping; if present, shut off and re-check belt routing and seating.
• Take a short test drive, then re-check belt alignment with the hood open.

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💰 DIY vs Shop Cost

Shop Cost: $180-$320 (parts + labor)

DIY Cost: $25-$70 (parts only)

You Save: $155-$250 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.7-1.2 hours.

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🎯 Ready to get started?

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