🔧 Traverse - Serpentine Belt Replacement

The serpentine belt (drive belt) runs the alternator, A/C compressor, power steering, and other accessories. Replacing a worn or cracked belt prevents squealing, charging problems, and sudden loss of steering assist or cooling.

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

---

⚠️ Safety & Precautions

• ⚠️ Work on a cool engine; hot pulleys and exhaust can burn you.
• ⚠️ Keep fingers and tools away from pulleys; never check belt tracking with the engine running up close.
• ⚠️ Support your A4—use jack stands (never the jack alone).
• ⚠️ If you remove any splash shields, keep fasteners organized so nothing contacts the belt later.
• ⚠️ Battery disconnect is not required, but remove the key and keep the vehicle off.

---

🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Lug nut socket 22mm
• Breaker bar 1/2"
• Serpentine belt tool (specialty)
• 15mm socket
• Ratchet 3/8"
• Extension set 3/8"
• Trim clip remover
• Flat-blade screwdriver
• Torque wrench 1/2"
• Flashlight
• Mechanic gloves
• Safety glasses

---

🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Serpentine belt - Qty: 1
• Serpentine belt tensioner (optional, if noisy or weak) - Qty: 1
• Idler pulley (optional, if noisy) - Qty: 1
• Plastic push clips (splash shield, optional) - Qty: 2-6

---

📋 Before You Begin

• Park on level ground, shift to Park, and set the parking brake.
• Chock the rear wheels using wheel chocks.
• Open the hood and locate 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 removal.
• Pro tip: Lay the new belt next to the old one.

---

🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Raise the right-front corner and remove the wheel

• Use a lug nut socket 22mm and breaker bar 1/2" to slightly loosen the right-front lug nuts (do not remove yet).
• Lift the right-front using a floor jack, then support with jack stands.
• Remove the lug nuts with the lug nut socket 22mm and take the wheel off.
• Reinstall later: Torque to 190 Nm (140 ft-lbs) using a torque wrench 1/2".

Step 2: Remove the right-front splash shield (inner fender access panel)

• Use a trim clip remover and flat-blade screwdriver to remove the plastic push clips/screws holding the access panel.
• Peel the panel back to expose the belt area.
• Pro tip: Put clips in a cup immediately.

Step 3: Relieve belt tension

• Find the belt tensioner (spring-loaded arm with a pulley).
• Install a 15mm socket on a ratchet 3/8" (or use a serpentine belt tool (specialty) for more leverage).
• Rotate the tensioner to relieve tension (it will be stiff; this is normal).
• Definition: The tensioner is a spring-loaded part that keeps the belt tight automatically.

Step 4: Remove the old belt

• While holding the tensioner released with the 15mm socket, slide the belt off one easy-to-reach pulley (usually the smooth idler or alternator).
• Slowly let the tensioner return to rest (do not let it snap back).
• Remove the belt from the remaining pulleys by hand.

Step 5: Inspect pulleys and tensioner before installing the new belt

• Use a flashlight and spin each pulley by hand. It should spin smoothly and quietly.
• Check for wobble, roughness, or grinding noises (these mean a pulley/tensioner may be failing).
• Look for oil/coolant contamination on pulleys; belt life drops fast if fluids are leaking.

Step 6: Route the new belt correctly

• Route the new belt around the pulleys following the under-hood routing diagram.
• Make sure the ribbed side of the belt sits in ribbed pulleys, and the smooth side rides on smooth pulleys.
• Use a flashlight to confirm every rib is seated in the grooves (especially the alternator and crank pulleys).

Step 7: Apply tension and finish installation

• Use the 15mm socket with the ratchet 3/8" (or serpentine belt tool (specialty)) to rotate the tensioner again.
• Slip the belt onto the last pulley.
• Slowly release the tensioner so it takes up belt slack.
• Recheck routing one more time; one wrong pulley will shred the belt quickly.

Step 8: Reinstall splash shield and wheel

• Reinstall the access panel using the trim clip remover and flat-blade screwdriver as needed for the clips.
• Install the wheel and hand-thread lug nuts.
• Lower the vehicle off the jack stands using the floor jack.
• Tighten lug nuts in a star pattern: Torque to 190 Nm (140 ft-lbs) using a torque wrench 1/2".

---

✅ After Repair

• Start the engine and let it idle while you watch the belt from a safe distance (hands/tools clear).
• Listen for chirping/squealing; if present, shut off and recheck routing and seating in grooves.
• Turn on A/C and headlights; belt should run smoothly without flutter.
• After a short drive, do a quick recheck through the wheel well to confirm the belt is centered on every pulley.

---

💰 DIY vs Shop Cost

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

DIY Cost: $35-$85 (parts only)

You Save: $145-$265 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.

---

🎯 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.