🔧 Tacoma - Starter Motor Replacement

You’ll be removing the old starter motor from the side of the transmission bellhousing and installing a new one. This involves disconnecting the battery, getting under the truck, and unbolting the starter and its electrical cables.

Difficulty Level: Intermediate | Estimated Time: 2-3 hours

---

⚠️ Safety & Precautions

• ⚠️ Disconnect the negative battery cable before touching the starter wiring to avoid sparks or short circuits.
• ⚠️ Always support the Tacoma with jack stands; never rely only on a floor jack.
• ⚠️ Let the exhaust cool completely before working underneath; the starter is near hot exhaust parts.
• ⚠️ Wear safety glasses; dirt and rust can fall into your eyes when working under the truck.
• ⚠️ Chock the rear wheels to prevent any vehicle movement while it’s lifted.

---

🔧 Required Tools

You'll need the following tools for this repair:

• 🛠️ Floor jack (rated 3-ton minimum)
• 🛠️ Jack stands (rated 3-ton minimum, Qty: 2-4)
• 🛠️ Wheel chocks
• 🛠️ Metric socket set (8mm–19mm)
• 🛠️ 3/8" drive ratchet
• 🛠️ 1/2" drive ratchet
• 🛠️ 3/8" drive extensions (3" and 6")
• 🛠️ 1/2" drive extensions (6")
• 🛠️ 12mm socket
• 🛠️ 13mm socket
• 🛠️ 14mm socket
• 🛠️ 10mm socket
• 🛠️ Torque wrench (3/8" drive, 5–80 ft-lbs range)
• 🛠️ Torque wrench (1/2" drive, 20–150 ft-lbs range)
• 🛠️ Flathead screwdriver (medium)
• 🛠️ Needle-nose pliers
• 🛠️ Trim clip removal tool
• 🛠️ Work light or headlamp
• 🛠️ Mechanic’s creeper
• 🛠️ Gloves
• 🛠️ Safety glasses

---

🔩 Required Parts

HowToo sells all the parts you need for this repair:

• 🔩 Starter motor (3.5L V6, 4WD) - Qty: 1
• 🔩 Starter mounting bolt set (if not reusing) - Qty: 1
• 🔩 Battery terminal cleaner or brush - Qty: 1
• 🔩 Dielectric grease - Qty: 1
• 🔩 Anti-seize compound - Qty: 1
• 🔩 Replacement skid plate bolts or clips (if any are damaged) - Qty: as needed
• 🔩 Shop towels or rags - Qty: 1 pack

---

📋 Before You Begin

• Park the Tacoma on a flat, level surface and set the parking brake fully.
• Place wheel chocks behind the rear wheels so the truck cannot roll.
• Open the hood and locate the battery on the driver side.
• Disconnect the negative (-) battery terminal with a 10mm socket and secure the cable so it cannot touch the post again.
• Gather all tools and parts where you can easily reach them once the truck is in the air.

---

🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Safely raise and support the Tacoma

• Position the floor jack (3-ton) under the front frame crossmember (center front area under the truck).
• Pump the jack to lift the front high enough to work under comfortably.
• Place jack stands (3-ton) under the frame rails on both sides, then slowly lower the truck onto the stands using the floor jack.
• Give the truck a gentle shake to confirm it is solidly supported.
• Never work under a truck supported only by a jack.

Step 2: Remove front skid plate (if equipped)

• The skid plate is the metal shield under the engine area that protects off-road components.
• Use a 12mm socket with the 3/8" ratchet to remove the skid plate bolts at the front and rear edges.
• If there are plastic clips, use the trim clip removal tool to pop them out without breaking them.
• Support the skid plate with one hand while removing the last bolt, then lower it and set it aside.
• Lay bolts out in order to remember positions.

Step 3: Locate the starter motor

• Slide under the truck using the mechanic’s creeper and shine the work light upward near the transmission bellhousing on the passenger side of the engine.
• The starter is a small cylindrical motor with a wiring harness and a thick cable going to it.
• Note the routing of the wires and the orientation of the starter for reinstallation.

Step 4: Disconnect starter electrical connections

• Confirm the negative battery cable is still disconnected before touching any wires.
• Locate the small plug (solenoid connector) on the starter and gently release the tab using a flathead screwdriver if needed, then unplug it by hand.
• Find the thick cable attached with a nut on the starter terminal.
• Use a 12mm socket and 3/8" ratchet to remove the nut holding the thick cable to the starter terminal.
• Pull the cable off the stud and set it aside out of your way.
• Torque for reassembly later: Torque cable nut to 13 Nm (10 ft-lbs).

Step 5: Remove starter mounting bolts

• The starter is held to the transmission bellhousing with two bolts (one upper, one lower).
• Use a 14mm socket with a 3/8" extension and ratchet to loosen and remove the lower starter bolt.
• For the upper bolt, use the 14mm socket plus a 6" extension and the 3/8" ratchet to reach it from below or slightly from the side.
• Support the starter body with one hand as you remove the last bolt so it does not drop.
• Torque for reassembly later: Torque starter mounting bolts to 37 Nm (27 ft-lbs).

Step 6: Remove the old starter

• Once the bolts are out, gently wiggle the starter away from the transmission.
• If it is stuck, tap it lightly with your hand or a gloved fist, not a hammer, to break it loose.
• Rotate and maneuver the starter down and out from the engine bay, watching for any wiring harnesses or hoses that may be in the way.
• Notice exactly how the starter comes out to match when reinstalling.

Step 7: Prepare the new starter

• Set the old and new starters side by side and compare them: mounting holes, electrical terminals, and shape should match.
• Lightly clean the mounting surface on the transmission with a shop towel so the new starter sits flat.
• Apply a tiny amount of anti-seize compound on the threads of the mounting bolts if desired, but keep it off the bolt heads and starter body.
• Put a small dab of dielectric grease on the electrical connector seal for better water resistance.

Step 8: Install the new starter

• Carefully maneuver the new starter into position at the bellhousing opening in the same orientation as the old one.
• Start the upper mounting bolt by hand through the starter into the transmission to hold it in place. Thread it a few turns only.
• Install the lower mounting bolt by hand to avoid cross-threading.
• Use the 14mm socket, extension, and 3/8" ratchet to snug both bolts evenly.
• Then use the 3/8" torque wrench with the 14mm socket to tighten each bolt to 37 Nm (27 ft-lbs).
• Hand-start bolts first to prevent damaged threads.

Step 9: Reconnect starter wiring

• Reinstall the thick cable onto the starter terminal stud.
• Thread the nut on by hand, then tighten with a 12mm socket and 3/8" torque wrench to 13 Nm (10 ft-lbs).
• Do not over-tighten; you can crack the plastic insulator on the starter.
• Plug the smaller solenoid connector back into the starter until it clicks firmly.
• Apply a light film of dielectric grease over exposed metal if desired to protect from corrosion.

Step 10: Reinstall skid plate

• Lift the skid plate back into position under the engine area.
• Install the bolts by hand first to avoid cross-threading.
• Use the 12mm socket and 3/8" ratchet to tighten the skid plate bolts snugly.
• If using a torque wrench, tighten skid plate bolts to about 29 Nm (21 ft-lbs) if specified for similar Toyota skid plates.
• Reinstall any plastic clips using the trim clip removal tool in reverse to press them back in.

Step 11: Lower the Tacoma

• Use the floor jack to raise the front slightly off the jack stands.
• Remove the jack stands from both sides.
• Slowly lower the truck back down to the ground with the floor jack.
• Remove the wheel chocks from behind the rear tires.

Step 12: Reconnect the battery and test

• Under the hood, clean the battery terminals with the battery terminal cleaner if there is any corrosion.
• Reconnect the negative (-) battery cable using a 10mm socket.
• Tighten the clamp bolt to about 5 Nm (44 in-lbs)—snug but not over-tight.
• Get in the Tacoma, shift to Park, and keep your foot on the brake.
• Turn the ignition to start the engine; the starter should crank quickly and smoothly.
• Listen for any grinding or unusual noises from the starter area.

---

✅ After Repair

• Start the engine several times to confirm consistent, strong cranking with no hesitation.
• Check under the Tacoma for any loose tools or parts you may have left behind.
• Verify that no warning lights appear on the dash related to charging or electrical systems.
• After a short drive, recheck the battery terminals and starter cable nut for tightness.

---

💰 DIY vs Shop Cost

Shop Cost: $650-$900 (parts + labor)

DIY Cost: $220-$380 (parts only)

You Save: $270-$520 by doing it yourself!

Shop labor rates typically run $100-$150/hour. This repair takes a shop approximately 1.5-2.0 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 above to add everything to your cart.