🔧 GS350 - Front Turn Signal Bulb Replacement

You’ll access the front turn signal bulb from behind the headlight, usually through the front wheel-well liner. The job is mainly removing a few plastic clips, swapping the bulb, then testing the signal.

Difficulty Level: Beginner | Estimated Time: 0.5-1.0 hours

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⚠️ Safety & Precautions

• ⚠️ Work on a level surface and set the parking brake.
• ⚠️ Let the headlight area cool before reaching behind it.
• ⚠️ If you raise the car, always support it with jack stands (never rely on the jack).
• ⚠️ Don’t touch the glass of a halogen bulb with bare fingers (skin oil can shorten bulb life).

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• 21mm socket
• 3/8" drive ratchet
• 3" extension
• Torque wrench (10-150 ft-lbs)
• 10mm socket
• Phillips screwdriver
• Trim clip removal tool
• Nitrile gloves
• Safety glasses
• Flashlight

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Front turn signal bulb (amber) - Replace in pairs - Qty: 2
• Fender liner push clips - Qty: 4

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📋 Before You Begin

• Park on level ground, turn the wheel toward the side you’re working on (gives more room in the wheel well).
• If you want maximum space, loosen the wheel lug nuts slightly before lifting the car.
• Trim clips can break—have a few spares.
• Assumption: Your GS350 uses replaceable front turn-signal bulbs (not a sealed LED turn-signal unit).

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: (Optional) Lift the front corner for more access

• Place wheel chocks behind the rear wheels.
• Use a floor jack (rated 3-ton minimum) to lift the front corner at the approved jack point.
• Set the car onto jack stands (rated 3-ton minimum) before working in the wheel well.

Step 2: (Optional) Remove the front wheel

• Use a 21mm socket and 3/8" drive ratchet to remove the lug nuts, then remove the wheel.
• When reinstalling later, Torque to 103 Nm (76 ft-lbs) using a torque wrench (10-150 ft-lbs).

Step 3: Open the front wheel-well liner for access

• Use a trim clip removal tool to pop out the plastic push-clips along the front/upper edge of the liner.
• If equipped with small screws, remove them with a Phillips screwdriver or 10mm socket.
• Gently pull the liner back to create a “window” behind the headlight.
• Pull straight—don’t twist the clips.

Step 4: Locate the front turn signal bulb socket

• Use a flashlight to look behind the headlight assembly.
• Find the turn-signal bulb socket (a round twist-lock socket with wires going to it).

Step 5: Remove the bulb socket

• Twist the socket counterclockwise by hand and pull it straight out.
• If it’s tight, use nitrile gloves for extra grip—avoid using pliers (they can crack the socket).

Step 6: Replace the bulb

• Pull the old bulb straight out of the socket.
• Install the new front turn signal bulb (amber) by pushing it straight in until fully seated.
• If it’s a halogen-style glass bulb, don’t touch the glass—hold it by the base.

Step 7: Reinstall the socket and test

• Reinsert the socket into the headlight and twist clockwise until it locks.
• Turn the ignition to ON and switch on the turn signal (and hazards) to confirm it flashes normally.
• If it doesn’t light, remove the socket and re-seat the bulb.

Step 8: Reassemble the wheel-well liner (and wheel if removed)

• Reposition the liner and reinstall the clips using a trim clip removal tool (to align them) and firm hand pressure to seat them.
• If you removed the wheel, install the lug nuts with a 21mm socket, lower the car, then Torque to 103 Nm (76 ft-lbs) using a torque wrench (10-150 ft-lbs).

Step 9: Repeat on the other side

• Replace the other front turn signal bulb the same way. Bulbs age together—pairs match color and brightness.

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✅ After Repair

• Verify left/right signals and hazard lights work and flash at a normal speed.
• Check the wheel-well liner is fully secured (no loose edges that can rub the tire).
• If you still get a bulb-out warning or rapid flash, your GS350 may have a non-serviceable LED turn signal module (headlamp service required).

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💰 DIY vs Shop Cost

Shop Cost: $120-$250 (parts + labor)

DIY Cost: $10-$40 (parts only)

You Save: $80-$210 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.5-1.0 hours.

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🎯 Ready to get started?

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