🔧 Alternator - Replacement

The alternator charges the battery and powers the electrical system while the engine is running. On your Accord, replacement involves removing the drive belt, disconnecting electrical connectors, and swapping the unit from the front of the engine.

Difficulty Level: Intermediate | Estimated Time: 1.5-3 hours

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⚠️ Safety & Precautions

• Disconnect the negative battery terminal before starting. This prevents short circuits.
• Let the engine cool down fully. The belt area and nearby parts can be hot.
• Keep tools clear of the battery positive cable and alternator output terminal.
• Do not start the engine with the alternator unplugged for long. Electrical damage can happen.
• Work on level ground with the parking brake set.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 12mm socket
• 14mm socket
• 3/8-inch ratchet
• 3/8-inch breaker bar
• Torque wrench
• Serpentine belt tool (specialty)
• Flat-blade screwdriver
• Pliers
• Socket extension
• Jack stands
• Wheel chocks
• Safety glasses
• Mechanic gloves

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Alternator - Qty: 1
• Serpentine belt - Qty: 1

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Disconnect the negative battery cable first.
• If your belt is cracked, glazed, or noisy, replace it now.
• Take a photo of the belt routing first.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Disconnect the battery

• Use a 10mm socket to remove the negative battery cable.
• Move the cable aside so it cannot touch the terminal.

Step 2: Remove the engine cover and intake ducting

• Use your hands or a flat-blade screwdriver to remove the engine cover, if equipped.
• Use a flat-blade screwdriver and pliers to loosen hose clamps and remove the intake duct for access.
• Keep all clamps and clips organized.

Step 3: Release the serpentine belt

• Use a serpentine belt tool (specialty) or 3/8-inch breaker bar to rotate the belt tensioner.
• Slip the belt off the alternator pulley, then slowly release the tensioner.
• Remove the belt from the engine bay.

Step 4: Unplug the alternator

• Use a 10mm socket to remove the protective cover and main charging cable nut, if equipped.
• Disconnect the electrical connector from the alternator.
• Move the harness aside carefully.

Step 5: Remove the alternator mounting bolts

• Use a 12mm socket and 14mm socket to remove the alternator mounting bolts.
• Support the alternator with one hand as you remove the last bolt.
• Lift the alternator out from the engine bay.

Step 6: Install the new alternator

• Position the new alternator in place by hand.
• Start all mounting bolts by hand first.
• Use a 12mm socket and 14mm socket to tighten the bolts evenly.
• Torque to 44 Nm (32 ft-lbs) for the alternator mounting bolts.

Step 7: Reconnect the electrical connections

• Reinstall the main charging cable and tighten the nut with a 10mm socket.
• Torque to 9 Nm (80 in-lbs) on the alternator output nut.
• Reconnect the alternator electrical plug until it clicks.
• Reinstall any protective cover.

Step 8: Reinstall the serpentine belt

• Route the belt exactly as removed.
• Use the serpentine belt tool (specialty) or 3/8-inch breaker bar to rotate the tensioner again.
• Slide the belt onto the alternator pulley last, then release tension slowly.
• Double-check every pulley groove before starting.

Step 9: Reassemble intake parts and battery

• Reinstall the intake duct and tighten clamps with a flat-blade screwdriver.
• Reinstall the engine cover.
• Reconnect the negative battery cable with a 10mm socket.
• Torque to 5 Nm (44 in-lbs) on the battery terminal snug fit.

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✅ After Repair

• Start the engine and listen for belt noise or rubbing.
• Check the battery warning light on the dash. It should turn off after start.
• Use a multimeter at the battery: charging voltage should usually be about 13.5-14.8 volts with the engine running.
• Inspect the belt path one more time after a short test drive.

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💰 DIY vs Shop Cost

Shop Cost: $650-$1,100 (parts + labor)

DIY Cost: $220-$450 (parts only)

You Save: $430-$650 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.5-3 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.