🔧 Fit - Serpentine Belt Replacement

On your Fit, the serpentine (accessory) belt drives components like the alternator and A/C. Replacing it is mostly about safely unloading the automatic belt tensioner, routing the new belt correctly, and confirming alignment on every pulley.

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

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⚠️ Safety & Precautions

• ⚠️ Keep hands clear of the tensioner; it snaps back hard.
• ⚠️ Work on a cool engine; the exhaust and radiator area can burn you.
• ⚠️ Support the car with jack stands if you lift it; never rely on a jack alone.
• ⚠️ Battery disconnect is not required, but keep tools away from the alternator power cable.

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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
• 19mm lug nut socket
• 1/2" drive breaker bar
• 1/2" drive ratchet
• 14mm socket
• 10mm socket
• Trim clip removal tool
• Flashlight
• Work 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
• Plastic fender liner clips (as needed) - Qty: 5

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📋 Before You Begin

• Park on level ground, set the parking brake, and place wheel chocks behind the rear wheels.
• Open the hood and use a flashlight to locate the belt routing diagram (usually a sticker under the hood). If you don’t see it, take a clear photo of the current belt routing before removal.
• If you lift the front-left corner for access, loosen the lug nuts slightly first using a 19mm lug nut socket and breaker bar.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Raise the front-left corner (optional but recommended)

• Use a 19mm lug nut socket and breaker bar to loosen the front-left lug nuts about 1/2 turn.
• Lift the front-left corner with a floor jack and support it with jack stands.
• Remove the wheel using a 19mm lug nut socket and 1/2" drive ratchet.

Step 2: Remove the lower splash shield/fender liner access

• Use a trim clip removal tool to pop out plastic clips.
• Use a 10mm socket to remove any small bolts holding the splash shield/fender liner section.
• Pull the shield/liner back enough to clearly see the belt and tensioner.

Step 3: Locate the belt tensioner

• Find the spring-loaded tensioner pulley (it’s the pulley on an arm).
• The tensioner has a hex/bolt head used to rotate it and release belt tension.
• Tip: Take a picture before touching anything.

Step 4: Release tension and remove the old belt

• Install a 14mm socket on the tensioner bolt and attach a 1/2" drive breaker bar.
• Rotate the tensioner to unload the belt (you’ll feel spring resistance). A “tensioner” is a spring-loaded arm that keeps the belt tight automatically.
• While holding the tensioner rotated, slide the belt off one easy-to-reach pulley.
• Slowly let the tensioner return to its stop (do not let it snap back).
• Remove the belt fully and compare its length and rib count to the new belt.

Step 5: Route the new belt

• Route the new belt around the pulleys following the under-hood diagram or your photo.
• Make sure the ribbed side sits in ribbed pulleys and the smooth side rides on smooth pulleys.
• Leave one pulley for last (typically the easiest to reach) so you can slip it on after releasing tension.

Step 6: Apply tension and seat the belt

• Use the 14mm socket and 1/2" drive breaker bar to rotate the tensioner again.
• Slip the belt onto the last pulley, then slowly release the tensioner.
• Visually check every pulley: the belt ribs must sit fully in the grooves, not hanging off an edge.
• Tip: Misalignment can shred a new belt fast.

Step 7: Reinstall splash shield and wheel

• Reposition the liner/shield and reinstall bolts using a 10mm socket.
• Reinstall any clips using a trim clip removal tool as needed to align them.
• Install the wheel and snug the lug nuts using a 19mm lug nut socket and 1/2" drive ratchet.
• Lower the car using a floor jack, then tighten lug nuts in a star pattern with a 19mm lug nut socket and breaker bar.
• Torque to 108 Nm (80 ft-lbs).

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✅ After Repair

• Start the engine and let it idle while you watch the belt for 30-60 seconds (keep hands and clothing away).
• Listen for squealing, chirping, or slapping sounds; shut off immediately if you hear them.
• Recheck belt seating on all pulleys with the engine off and a flashlight.
• If the belt walks off-center, a pulley or tensioner may be worn and should be inspected.

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💰 DIY vs Shop Cost

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

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

You Save: $125-$230 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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