🔧 Impreza - Starter Motor Replacement

The starter motor spins the engine so it can start. If it clicks, cranks slowly, or won’t crank (and the battery is known-good), replacing the starter is a common fix.

Difficulty Level: Intermediate | Estimated Time: 1.0-2.0 hours

Assumption: Stock intake/engine bay; torque specs shown are typical for this Impreza.

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⚠️ Safety & Precautions

• ⚠️ Disconnect the negative battery terminal first to prevent a short circuit at the starter’s main power cable.
• ⚠️ Work on a cool engine; the exhaust and engine parts can burn you.
• ⚠️ If you raise the car, support it on jack stands—never rely on a floor jack alone.
• ⚠️ Keep tools away from the battery positive post and starter B+ stud at all times.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Mechanic gloves
• Wheel chocks
• Floor jack (rated 2-ton minimum)
• Jack stands (rated 2-ton minimum)
• 10mm socket
• 12mm socket
• 14mm socket
• 3/8" ratchet
• 3/8" torque wrench (10–80 Nm range)
• 3" extension
• 6" extension
• Universal joint adapter
• Phillips screwdriver
• Trim clip removal tool
• Needle-nose pliers
• Flashlight
• Small wire brush

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Starter motor - Qty: 1
• Starter electrical terminal nut(s) - Qty: 1
• Dielectric grease - Qty: 1
• Anti-seize compound - Qty: 1

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📋 Before You Begin

• Park on level ground, set the parking brake, and place wheel chocks behind the rear wheels.
• Open the hood and keep the key out of the ignition.
• Disconnect the battery: use a 10mm socket to remove the negative (–) cable first, then move it aside so it can’t spring back.
• Tip: Take a quick photo of the wiring before removal.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Create access to the starter

• Use a Phillips screwdriver to loosen the intake duct hose clamp(s) near the throttle body/airbox.
• Use a trim clip removal tool (a small forked pry tool that pops plastic clips without breaking them) to remove any intake snorkel clips if equipped.
• Use a 10mm socket to remove the airbox/duct bolts (if equipped), then lift the ducting/airbox pieces out to open up space at the back/top of the engine.
• Use a flashlight to locate the starter on top of the transmission bellhousing (near the firewall area).

Step 2: Disconnect the starter wiring

• Pull back the rubber boot on the starter’s large power terminal (B+).
• Use a 12mm socket to remove the nut on the large power cable, then lift the cable off and tuck it aside so it can’t touch metal.
• Disconnect the small starter signal connector: use needle-nose pliers only if needed, and pull straight off (don’t yank the wires).
• Clean the cable eyelet lightly with a small wire brush if it’s dirty or green/corroded.

Step 3: Remove the starter mounting bolts

• Use a 14mm socket with a 3" extension (and a universal joint adapter if needed) to remove the two starter mounting bolts.
• Support the starter with one hand as you remove the last bolt so it doesn’t drop or snag wiring.
• Lift the starter up and out of the engine bay.

Step 4: Install the new starter

• Set the new starter in place, lining up the nose with the bellhousing opening.
• Start both mounting bolts by hand first (this prevents cross-threading).
• Use a 14mm socket to snug the bolts, then use a 3/8" torque wrench (a tool that clicks at the exact tightness) and Torque to 39 Nm (29 ft-lbs).
• Tip: A tiny dab of anti-seize on bolt threads helps future removal.

Step 5: Reconnect the starter wiring

• Push the small signal connector back on until it clicks/feels fully seated.
• Install the large power cable onto the B+ stud, then use a 12mm socket to tighten the nut and Torque to 13 Nm (10 ft-lbs).
• Apply a light smear of dielectric grease on the outside of the rubber boot, then slide the boot back over the terminal.

Step 6: Reinstall the intake parts

• Reinstall the airbox/ducting you removed using a 10mm socket.
• Use a Phillips screwdriver to tighten the intake hose clamps snugly (no need to over-tighten).
• Double-check that all clips and hoses are fully seated and no tools are left in the bay.

Step 7: Reconnect the battery

• Reconnect the negative (–) battery cable using a 10mm socket.
• Make sure the terminal doesn’t rotate by hand when tightened.

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✅ After Repair

• Start the engine and confirm it cranks strong and starts normally.
• Listen for abnormal grinding or whining during crank; if heard, shut it off and recheck starter seating/bolts.
• Check that the intake is sealed (no hissing, stable idle).
• If the car still only clicks: inspect battery condition and battery cable connections (tight/clean).

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💰 DIY vs Shop Cost

Shop Cost: $450-$850 (parts + labor)

DIY Cost: $160-$420 (parts only)

You Save: $290-$430 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.0-2.0 hours.

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