🔧 TLX - Starter Motor Replacement

Your starter motor spins the engine so it can begin running. When it fails, you may get a single click, slow cranking, or no crank at all. On your TLX, the starter sits on the front side of the transmission bellhousing and is accessed from the top after removing a few components.

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

Assumption: Stock intake/battery layout; access from top.

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⚠️ Safety & Precautions

• 🛑 Disconnect the battery negative terminal first to prevent a short.
• 🧤 Let the engine cool before working near the radiator/exhaust area.
• 👓 Wear safety glasses; small debris can fall when loosening bolts.
• ⚡ Do not allow your wrench to touch metal while on the starter power stud.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Mechanic gloves
• 10mm socket
• 12mm socket
• 14mm socket
• 3/8" ratchet
• 3/8" torque wrench (10-80 Nm range)
• 3/8" extension set (3" and 6")
• Flat trim tool
• Needle-nose pliers
• 10mm wrench
• Pick tool
• Magnetic pickup tool
• Shop light

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Starter motor assembly - Qty: 1
• Battery terminal anti-corrosion pads - Qty: 2
• Dielectric grease - Qty: 1

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📋 Before You Begin

• Park on level ground, shift to Park, and set the parking brake.
• Open the hood and keep the key fob away from the car (10+ feet).
• Disconnect the battery: use a 10mm wrench to remove the negative cable first, then secure it so it can’t spring back.
• Have a small container ready for bolts so nothing gets lost.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the intake ducting for access

• Use a flat trim tool to pop up any plastic clips holding the upper air duct/resonator.
• Use a 10mm socket to loosen the hose clamp(s) at the intake tube.
• Lift the ducting out and set it aside.
• Tip: Take a quick photo before removal.

Step 2: Remove the battery and battery tray (if blocking access)

• Use a 10mm socket to remove the battery hold-down hardware.
• Lift the battery straight up and out. Keep it upright.
• Use a 10mm socket and 12mm socket (varies by bracket) to remove the battery tray bolts, then remove the tray.

Step 3: Locate the starter and unplug the small connector

• Find the starter on the front side of the transmission bellhousing (a small motor with a thicker power cable).
• Use a pick tool to gently lift the locking tab, then unplug the small starter solenoid connector.
• Tip: Don’t pull on the wires—pull the plug.

Step 4: Remove the main power cable from the starter

• Use a 10mm socket to remove the nut holding the plastic terminal cover (if equipped), then open the cover.
• Use a 12mm socket to remove the nut on the starter power stud.
• Lift the cable eyelet off the stud and move it aside so it cannot touch metal.

Step 5: Unbolt and remove the starter motor

• Use a 14mm socket, 3/8" ratchet, and a 3/8" extension to remove the starter mounting bolts (typically 2 bolts).
• Support the starter with one hand as the last bolt comes out.
• Lift the starter up and out. Use a magnetic pickup tool if a bolt tries to drop.

Step 6: Install the new starter

• Compare the old and new starter: same nose shape, connector location, and power stud position.
• Set the new starter in place and hand-start both mounting bolts to avoid cross-threading.
• Use a 14mm socket to tighten the mounting bolts, then Torque to 44 Nm (32 ft-lbs).

Step 7: Reconnect wiring to the starter

• Install the main power cable eyelet onto the stud and thread the nut by hand.
• Use a 12mm socket to tighten the nut, then Torque to 9 Nm (80 in-lbs).
• Apply a small amount of dielectric grease to the outside of the connector seal, then plug in the small solenoid connector until it clicks.
• Reinstall the terminal cover using a 10mm socket if equipped.

Step 8: Reinstall battery tray, battery, and intake parts

• Reinstall the battery tray using a 10mm socket and 12mm socket and tighten securely.
• Set the battery in place and reinstall the hold-down using a 10mm socket.
• Reconnect battery terminals: positive first, negative last using a 10mm wrench.
• Install anti-corrosion pads on the terminals (optional but recommended).
• Reinstall the intake ducting and tighten clamps using a 10mm socket.

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✅ After Repair

• Start the engine and verify it cranks strongly with no clicking.
• Check that no warning lights appear related to disconnected sensors (a brief light is normal during first key-on).
• Recheck the starter power cable nut and that the terminal cover is fully seated.
• If the battery was disconnected, your TLX may need idle relearn; let it idle for a few minutes with all accessories off.

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💰 DIY vs Shop Cost

Shop Cost: $550-$950 (parts + labor)

DIY Cost: $180-$450 (parts only)

You Save: $370-$500 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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