🔧 86 - Alternator Replacement

I can walk you through replacing the alternator on your 86 step-by-step. Before I lay out the exact procedure (with the correct factory torque specs), I need two quick details to make sure I give you the right variant.

Difficulty Level: Intermediate | Estimated Time: 1.5–3.0 hours

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⚠️ Safety & Precautions

• 🧯 Disconnect the negative battery cable first to prevent a short at the alternator power wire.
• 🧤 Let the engine cool fully; you’ll be working near hot exhaust and the radiator fan.
• 🛞 Support the car securely if you remove the lower undertray; never rely on a jack alone.

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🔧 Required Tools

You'll need the following tools for this repair:

• 1/4" drive ratchet
• 3/8" drive ratchet
• 3/8" drive torque wrench (10–100 Nm range)
• 10mm socket
• 12mm socket
• 14mm socket
• 10mm wrench
• Trim clip removal tool
• Flat-blade screwdriver
• Needle-nose pliers
• Serpentine belt tool or long 14mm box wrench
• Floor jack (rated 2-ton minimum)
• Jack stands (rated 2-ton minimum)
• 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 drive belt - Qty: 1

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Open the hood and keep the key fob away from the car.
• Plan on disconnecting the battery before touching the alternator wiring.

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🔨 Step-by-Step Instructions

Before I post the exact numbered steps (with the correct torque specs), answer these two quick questions:

• 🔎 Are you replacing only the alternator, or the alternator + serpentine belt at the same time?
• 📸 Can you upload a quick photo of the alternator area from above (passenger side front of the engine) so I can confirm access points and which fasteners you’ll see?

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✅ After Repair

• Once installed, you’ll verify belt routing, charging voltage, and listen for belt squeal.

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💰 DIY vs Shop Cost

Shop Cost: $450–$900 (parts + labor)

DIY Cost: $180–$450 (parts only)

You Save: $270–$450 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.5–2.5 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.