🔧 Tucson - Serpentine Belt Replacement

The serpentine belt runs your A/C, alternator (battery charging), and other accessories. If it’s cracked, squealing, or glazed, replacing it helps prevent a no-charge condition or overheating.

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

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⚠️ Safety & Precautions

• ⚠️ Work on a cold engine; hot parts can burn you.
• ⚠️ Keep fingers/clothes clear of pulleys; never work with the engine running.
• ⚠️ The belt tensioner is spring-loaded; it can snap back quickly.
• ⚠️ If you raise the vehicle, support it with jack stands before going under.

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🔧 Required Tools

You'll need the following tools for this repair:

• 17mm socket
• 3/8" drive ratchet
• 3/8" drive breaker bar (18" minimum)
• 10mm socket
• Trim clip removal tool
• Flathead screwdriver
• Torque wrench (10-150 ft-lbs)
• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Work light
• Mechanic gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Serpentine belt - Qty: 1
• Serpentine belt tensioner assembly - Qty: 1 (optional if noisy/weak)
• Idler pulley - Qty: 1 (optional if noisy/rough)

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📋 Before You Begin

• Park on level ground, set the parking brake, and chock the rear wheels.
• Open the hood and find the belt routing diagram (usually on the radiator support/underside of hood). If it’s missing, take a clear photo of the current routing before removing the belt.
• If you choose the wheel-well access method, loosen the right-front wheel lug nuts slightly before lifting.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Get access to the belt

• Use a work light to locate the belt and the belt tensioner.
• If you have enough room from the top, you can often do this without removing the wheel.
• If access is tight, use the wheel-well method below (recommended for beginners).

Step 2: (Recommended) Raise the right-front and remove the wheel

• Use a 17mm socket and breaker bar to loosen the right-front lug nuts 1/2 turn.
• Lift the right-front using a floor jack (rated 3-ton minimum) at the proper jacking point.
• Set the vehicle onto jack stands (rated 3-ton minimum) and confirm it’s stable.
• Remove the lug nuts with a 17mm socket and remove the wheel.

Step 3: Remove the right-front splash shield section (if equipped)

• Use a trim clip removal tool to pop out plastic push-clips.
• Use a 10mm socket to remove any small bolts holding the shield.
• Move the shield aside to expose the belt/pulleys.
• Keep clips together so none get lost.

Step 4: Locate the belt tensioner and relieve tension

• Find the belt tensioner (the spring-loaded arm that keeps the belt tight).
• Place a 17mm socket and breaker bar on the tensioner pulley center bolt.
• Rotate the tensioner smoothly to relieve belt tension, then slide the belt off one easy-to-reach pulley.
• Slowly let the tensioner return to its resting position.

Step 5: Remove the old belt and compare lengths

• Pull the belt out of the engine bay/wheel well by hand.
• Lay the old belt next to the new belt to confirm the overall length and rib count match.
• If the old belt is shredded, inspect the pulleys carefully for damage or misalignment.

Step 6: Inspect pulleys and tensioner before installing the new belt

• Spin each accessible pulley by hand; it should feel smooth and quiet.
• Wiggle pulleys gently; there should be no wobble.
• If you hear grinding or feel roughness, plan to replace the noisy pulley/tensioner before finishing.

Step 7: Route the new belt

• Route the new belt using the under-hood diagram (or your photo), keeping ribs aligned in the grooved pulleys.
• Leave the easiest smooth pulley for last (usually an idler or alternator area) so you can slip it on after tension is released.
• Use your work light to confirm the belt is centered on every pulley.

Step 8: Apply tension and seat the belt

• Use a 17mm socket and breaker bar to rotate the tensioner again.
• Slip the belt fully onto the last pulley, then slowly release the tensioner.
• Double-check: the belt must sit fully in the grooves on every ribbed pulley.

Step 9: Reinstall splash shield and wheel

• Reinstall the splash shield using the 10mm socket, trim clip removal tool, and flathead screwdriver as needed.
• Reinstall the wheel and hand-thread lug nuts.
• Lower the vehicle off the jack stands using the floor jack (rated 3-ton minimum).
• Tighten lug nuts in a star pattern using a torque wrench (10-150 ft-lbs): Torque to 90 Nm (66 ft-lbs).

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✅ After Repair

• Start the engine and watch the belt for 30-60 seconds; it should run smoothly with no wobble.
• Listen for squealing or chirping. If you hear noise, shut it off and re-check belt alignment on every pulley.
• Turn the A/C on and confirm normal operation (no belt slip noise).
• Recheck the belt routing one more time after a short test drive.

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💰 DIY vs Shop Cost

Shop Cost: $150-$300 (parts + labor)

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

You Save: $120-$220 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?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.