🔧 Tucson - Serpentine Belt Replacement

The serpentine belt (also called the accessory drive belt) spins key accessories like the alternator and A/C compressor. On your Tucson, the belt is kept tight by an automatic spring-loaded tensioner, so the job is mostly about safely relieving tension, swapping the belt, and confirming correct routing.

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 the radiator fan.
• ⚠️ Support the Tucson with jack stands before going under; never rely on a jack alone.
• ⚠️ Keep fingers out of the belt path while releasing the tensioner (it snaps back hard).
• ⚠️ Battery disconnect is not strictly required, but it’s safer to disconnect the negative terminal if your hands/tools will be near the alternator.

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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
• 21mm socket
• 1/2" drive ratchet
• 1/2" drive breaker bar (18" minimum)
• 17mm socket
• 10mm socket
• Trim clip removal tool
• Flashlight
• Mechanic gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Serpentine belt (accessory drive belt) - Qty: 1
• Engine undercover / splash shield clips - Qty: 1 set

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📋 Before You Begin

• Park on level ground, shift to Park, and set the parking brake.
• Chock the rear wheels with wheel chocks.
• Open the hood and remove the plastic engine cover (it pulls up once released).
• Tip: Take a quick photo of the belt routing.
• Assumption: Your Tucson uses a spring-loaded automatic belt tensioner with a 17mm hex for releasing tension (common on the 1.6T). If your tensioner uses a different hex size, use the socket that fits snugly.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Lift and secure the right-front corner

• Use a 21mm socket with a 1/2" drive ratchet to slightly loosen the right-front wheel lug nuts (about 1/2 turn) while the tire is still on the ground.
• Lift the right-front corner with a floor jack (rated 2-ton minimum).
• Place jack stands (rated 2-ton minimum) under a solid support point and lower the Tucson onto the stands.
• Remove the wheel using the 21mm socket.

Step 2: Remove the right-front splash shield access

• Use a trim clip removal tool to pop out the plastic clips holding the front/right splash shield area.
• Use a 10mm socket to remove any small bolts securing the liner/undercover edge.
• Pull the liner back enough to see the belt, pulleys, and the tensioner.
• Use a flashlight so you can clearly see the belt ribs and pulley grooves.

Step 3: Locate the tensioner and set up your tool

• Find the belt tensioner (a spring-loaded arm with a smooth pulley). A tensioner is a spring mechanism that keeps the belt tight automatically.
• Install a 17mm socket on a 1/2" drive breaker bar and place it on the tensioner’s hex.
• Make sure the socket is fully seated so it doesn’t slip.

Step 4: Release belt tension and remove the old belt

• Use the 1/2" drive breaker bar to rotate the tensioner smoothly to relieve belt tension.
• While holding the tensioner back, slide the belt off the easiest-to-reach pulley (usually a smooth idler/tensioner pulley) using your free hand.
• Slowly let the tensioner return to its resting position (do not let it snap back).
• Pull the belt out of the engine bay.
• Tip: Keep fingers away from pinch points.

Step 5: Route the new belt correctly

• Compare the new belt to the old belt (length and rib count should match).
• Route the new belt around the pulleys following the belt routing diagram (often on a sticker under the hood). If there’s no sticker, use the photo you took.
• Make sure the ribbed side of the belt sits fully in the grooves of ribbed pulleys.
• Make sure the smooth side of the belt rides on smooth pulleys.

Step 6: Apply tension and seat the belt

• Use the 17mm socket with the 1/2" drive breaker bar to rotate the tensioner again.
• Slip the belt onto the last pulley.
• Slowly release the tensioner so it applies tension to the belt.
• Visually check every pulley: the belt must be centered and fully seated.

Step 7: Reinstall splash shield and wheel

• Reposition the splash shield/liner and reinstall fasteners using the 10mm socket and trim clip removal tool (clips push back in).
• Reinstall the wheel and snug the lug nuts using the 21mm socket.
• Lift slightly with the floor jack, remove the jack stands, and lower the Tucson.
• Tighten lug nuts in a star pattern using the 21mm socket: Torque to 88-108 Nm (65-80 ft-lbs).

Step 8: Reinstall engine cover

• Press the engine cover back into place until it fully seats.

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✅ After Repair

• Before starting, do a final visual check that the belt is correctly seated on every pulley.
• Start the engine and let it idle for 30-60 seconds while watching the belt (from a safe distance).
• Listen for squealing, slapping, or chirping noises (often caused by misrouting or a belt not seated in grooves).
• Turn A/C on and headlights on; re-check that the belt runs smoothly.
• After a short test drive, recheck belt alignment with the flashlight.

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💰 DIY vs Shop Cost

Shop Cost: $150-$320 (parts + labor)

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

You Save: $125-$250 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.8-1.2 hours.

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🎯 Ready to get started?

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