🔧 Altima - Starter Motor Replacement

The starter motor spins your engine fast enough for it to start. On your Altima, the starter is mounted to the transmission bellhousing area and is serviced by disconnecting the battery, removing a few intake/air parts for access, then swapping the starter.

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

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⚠️ Safety & Precautions

• ⚠️ Disconnect the battery negative cable before touching the starter wiring (the large cable is always “hot”).
• ⚠️ Let the engine cool before working near the exhaust/catalyst area.
• ⚠️ If you raise the car, support it on jack stands on solid level ground—never rely on a jack.
• ⚠️ Keep keys/fob away from the car while working (prevents accidental wake-up/energizing).

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Mechanic gloves
• Wheel chocks
• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• 10mm socket
• 12mm socket
• 13mm socket
• 14mm socket
• 3/8" ratchet
• 3/8" torque wrench (10–100 Nm range)
• 3/8" extensions (3" and 6")
• Universal joint adapter (3/8")
• Flathead screwdriver
• Trim clip removal tool
• Needle-nose pliers
• Flashlight

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Starter motor - Qty: 1
• Battery terminal anti-corrosion pads - Qty: 2
• Electrical contact cleaner - Qty: 1

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📋 Before You Begin

• Park on a level surface, shift to Park, and set the parking brake.
• Chock the rear wheels with wheel chocks.
• Open the hood and keep the key fob at least 15 feet away.
• Plan to disconnect the battery: you’ll remove the negative terminal first, then reconnect it last.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Disconnect the battery

• Use a 10mm socket and 3/8" ratchet to loosen the negative battery terminal clamp.
• Lift the negative cable off the battery post and tuck it aside so it can’t spring back.
• Negative off first, on last.

Step 2: Remove the air intake ducting (for access)

• Use a flathead screwdriver to loosen the worm clamps on the intake tube.
• Unclip/undo any intake duct fasteners using a 10mm socket.
• Lift the duct/air tube out carefully and set it aside.

Step 3: Raise the front (if you need under-car access)

• Use a floor jack (rated 3-ton minimum) to lift the front at the proper front jacking point.
• Set the car down onto jack stands (rated 3-ton minimum).
• Give the car a gentle push to confirm it’s stable before getting under it.

Step 4: Remove the lower splash shield (if equipped)

• Use a trim clip removal tool to pop out plastic clips.
• Use a 10mm socket to remove any small bolts.
• Lower the shield and set it aside.

Step 5: Locate the starter and label the connections

• Use a flashlight to locate the starter where the engine meets the transmission.
• Identify the small control connector (signal wire) and the large battery cable on the starter solenoid.
• Take a quick photo before unplugging.

Step 6: Disconnect the starter wiring

• Unplug the small connector by pressing the tab (use needle-nose pliers only if needed—don’t crush it).
• Remove the nut for the large battery cable using a 12mm socket or 13mm socket (varies by hardware), then lift the cable off.
• Spray terminals with electrical contact cleaner if dirty and let dry.

Step 7: Remove the starter mounting bolts

• Support the starter with one hand.
• Use a 14mm socket, 3/8" ratchet, and extensions (3" and 6") (and a universal joint adapter (3/8") if needed) to remove the starter mounting bolts.
• Slide the starter out of the bellhousing and out of the vehicle.

Step 8: Compare parts and transfer any shields/brackets

• Compare the old and new starter motor: mounting ears, nose length, and electrical studs should match.
• If your starter has a heat shield/bracket, move it to the new unit using the same fasteners and the correct socket size.

Step 9: Install the new starter

• Position the new starter into place by hand.
• Start both mounting bolts by hand first (prevents cross-threading).
• Tighten with a 14mm socket and 3/8" ratchet, then final-tighten with a 3/8" torque wrench (10–100 Nm range) to Torque to Nissan factory specification.

Step 10: Reconnect the wiring

• Install the large battery cable onto the starter stud and tighten the nut using the same 12mm socket or 13mm socket, then Torque to Nissan factory specification.
• Plug the small control connector back in until it clicks.
• Confirm the cable routing won’t rub on anything or touch hot exhaust parts.

Step 11: Reinstall splash shield and intake parts

• Reinstall the lower splash shield using the 10mm socket and trim clip removal tool.
• Reinstall the intake ducting and tighten the clamps with a flathead screwdriver.

Step 12: Reconnect the battery and test

• Reinstall the negative terminal clamp using a 10mm socket and then Torque to Nissan factory specification.
• Start the engine and listen for a clean, strong crank with no grinding.

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✅ After Repair

• Start the engine 3–5 times to confirm consistent cranking.
• Check that no warning lights appear related to low voltage.
• Re-check the starter’s large cable nut for tightness after a short test drive (engine off, key away).
• If it still clicks/no-cranks, the next checks are battery condition and the starter relay/fuse.

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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 1.5-3.0 hours.

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🎯 Ready to get started?

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