🔧 Sentra - Rear Brake Shoe Replacement

Your Sentra S has rear drum brakes, so it uses curved brake shoes rather than brake pads. Replace the shoes on both rear wheels together, inspect the drums and wheel cylinders, then adjust the brakes before driving.

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

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⚠️ Safety & Precautions

• ⚠️ Support your Sentra with jack stands. Never work under a vehicle supported only by a jack.
• 🛑 Keep the parking brake released after securing the front wheels; otherwise, the drums may not come off.
• 😷 Do not use compressed air or brush away brake dust. Wet it with brake cleaner and wipe it up.
• 🔧 Service one side at a time so the assembled side remains a reference.
• 💧 Brake fluid damages paint. If a wheel cylinder is leaking, avoid contact and clean spills immediately.
• 🔋 Battery disconnection is not required.

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🔧 Required Tools

You'll need the following tools for this repair:

• 21mm deep socket
• 3/8-inch drive ratchet
• 1/2-inch drive breaker bar
• 1/2-inch drive torque wrench rated to at least 120 Nm
• Floor jack rated 2-ton minimum
• Jack stands rated 2-ton minimum
• Wheel chocks
• Brake spring pliers (specialty)
• Brake shoe hold-down spring tool (specialty)
• Brake adjusting spoon (specialty)
• Small flat-blade screwdriver
• Needle-nose locking pliers
• Digital caliper with 300mm range
• Brake parts cleaning tray
• Shop towels
• Nitrile gloves
• Safety glasses
• NIOSH-approved P100 dust mask

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Rear drum brake shoe set - Qty: 1 set for both wheels
• Rear brake shoe hardware kit - Qty: 1 set for both wheels
• Brake parts cleaner - Qty: 2 cans
• High-temperature silicone brake lubricant - Qty: 1 tube
• Rear brake drums - Qty: 2 if worn, cracked, heat-damaged, or oversized
• Rear wheel cylinders - Qty: 2 if leaking or seized; replace in pairs
• DOT 3 brake fluid - Qty: 500 ml if wheel cylinders are replaced

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📋 Before You Begin

• 🅿️ Park on firm, level ground. Leave the transmission in first gear and switch off the engine.
• 🧱 Place wheel chocks firmly in front of and behind both front tires.
• 🔓 Release the parking brake completely so the rear drums can slide over the shoes.
• 📱 Photograph each brake assembly before removing any springs. Spring position and shoe orientation must be duplicated exactly.
• 🔍 Check the replacement shoes and hardware against the original parts before disassembly.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Loosen the Rear Wheel Nuts

• Use a 21mm deep socket and 1/2-inch drive breaker bar to loosen each rear wheel nut about one-half turn.
• Do not remove the nuts while your Sentra is still on the ground.

Step 2: Raise and Support the Rear

• Use the floor jack rated 2-ton minimum at the specified rear lifting point.
• Position the jack stands rated 2-ton minimum beneath the reinforced rear support points.
• Lower your Sentra onto the stands, then gently push the body to verify it is stable.
• Keep the floor jack nearby as secondary support.

Step 3: Remove the Rear Wheels

• Use the 21mm deep socket and 3/8-inch drive ratchet to remove the wheel nuts.
• Remove both rear wheels and slide them underneath the body as an additional precaution.

Step 4: Remove the Brake Drum

• Confirm the parking brake is fully released.
• Pull the drum straight outward by hand while rotating it slightly.
• If the drum catches on the shoes, remove the rear access plug and use the small flat-blade screwdriver with the brake adjusting spoon to release the adjuster pawl and retract the shoes.
• Do not strike the wheel studs or pry against the backing plate.
• If the drum remains seized by rust, professional removal is safer than using excessive force.

Step 5: Inspect and Record the Assembly

• Wear the P100 dust mask, safety glasses, and nitrile gloves.
• Use brake parts cleaner over the brake parts cleaning tray to wet the dust. Wipe it away with shop towels.
• Photograph the shoes, return springs, hold-down springs, adjuster, and parking-brake lever.
• Inspect the wheel-cylinder rubber boots. Any wet brake fluid means the wheel cylinder must be replaced and the hydraulic system bled.
• Inspect the drum for cracks, deep grooves, blue heat spots, or an obvious ridge.
• Use the digital caliper with 300mm range to measure the drum’s internal diameter. Replace both drums if either exceeds the maximum diameter cast or stamped into the drum.

Step 6: Remove the Return and Hold-Down Springs

• Work on only one wheel at a time.
• Use the brake spring pliers to detach the upper and lower return springs while controlling their tension.
• Use the brake shoe hold-down spring tool to press and rotate each hold-down retainer until it releases.
• Keep your face out of the spring’s path.
• Remove the adjuster and note which end faces the front of your Sentra.

Step 7: Disconnect the Parking-Brake Cable

• Pull the rear shoe slightly away from the backing plate.
• Use the needle-nose locking pliers to compress and control the parking-brake cable spring.
• Use the small flat-blade screwdriver to release the cable end from the shoe lever.
• Remove both shoes and the remaining hardware together so their arrangement remains visible.

Step 8: Clean and Lubricate the Contact Points

• Use brake parts cleaner and shop towels to clean the backing plate and adjuster.
• Apply a very thin film of high-temperature silicone brake lubricant to the raised backing-plate pads where the shoe edges slide.
• Apply a small amount to the adjuster threads, then turn the adjuster by hand to distribute it.
• Keep all lubricant away from shoe linings, drum surfaces, and wheel-cylinder boots.
• A tiny amount is enough.

Step 9: Transfer the Parking-Brake Lever

• Compare the old and new shoes carefully before assembly.
• If the parking-brake lever is not supplied on the new rear shoe, use the needle-nose locking pliers and small flat-blade screwdriver to transfer the original lever and retaining clip.
• Verify that the lever pivots freely without side-to-side looseness.

Step 10: Install the New Shoes and Hardware

• Connect the parking-brake cable to the correct rear shoe using the needle-nose locking pliers.
• Position both shoes against the wheel cylinder, lower anchor, and backing plate exactly as shown in your reference photograph.
• Install the new hold-down pins, springs, and retainers with the brake shoe hold-down spring tool.
• Install the cleaned adjuster in its original orientation.
• Use the brake spring pliers to install the new lower and upper return springs in the original locations.
• Confirm the shoe ends sit correctly against the wheel-cylinder pistons and lower anchor.

Step 11: Set the Initial Shoe Adjustment

• Use the brake adjusting spoon to expand the adjuster gradually.
• Test-fit the drum repeatedly until it slides on without force and produces a light, even rubbing sound when rotated by hand.
• If the drum will not slide on, retract the adjuster slightly. Never force the drum over the new shoes.
• Repeat Steps 4-11 on the opposite rear wheel.

Step 12: Reinstall the Wheels

• Install each wheel and thread all wheel nuts by hand.
• Use the 21mm deep socket and 3/8-inch drive ratchet to snug the nuts in a crisscross pattern.
• Use the floor jack rated 2-ton minimum to raise your Sentra slightly, remove the jack stands, and lower it to the ground.
• Use the 21mm deep socket and 1/2-inch drive torque wrench to tighten the wheel nuts in a crisscross pattern: Torque to 113 Nm (83 ft-lbs).

Step 13: Seat and Check the Brakes

• With the engine off, press the brake pedal repeatedly until it feels firm.
• Apply and release the parking brake several times to help center and adjust the shoes.
• Raise each rear wheel again only if necessary and verify that it rotates with slight, even drag rather than binding.

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✅ After Repair

• 🛑 Do not drive if the brake pedal remains soft, sinks toward the floor, or a wheel cylinder is leaking.
• 🚗 Perform the first test at walking speed in a clear, level area. Confirm normal pedal feel and straight braking.
• 🅿️ Test the parking brake on level ground before relying on it on a slope.
• 🌡️ After a short drive, carefully check near each rear wheel for unusual heat or a burning smell. Excess heat indicates over-adjustment or incorrect assembly.
• 🔄 Avoid repeated hard stops for the first 300 km while the new shoes conform to the drums.
• 🔧 Recheck wheel-nut torque after approximately 80-100 km.

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💰 DIY vs Shop Cost

Shop Cost: ₹7,000-₹14,000 including parts and labour

DIY Cost: ₹2,500-₹6,000 for shoes and hardware

You Save: ₹4,500-₹8,000 by doing it yourself!

Local labour rates vary. Drum replacement or leaking wheel cylinders will increase the total, and this repair takes a shop approximately 1.5-2.5 hours.

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