🔧 Q5 - Rear Brake Pads & Rotor Replacement

On your Q5, the rear brake pads clamp the rotor (disc) to slow the vehicle. Replacing pads and rotors together is common when rotors are worn, grooved, or below minimum thickness, and it helps prevent noise and vibration.

Difficulty Level: Intermediate | Estimated Time: 2.0-3.5 hours

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⚠️ Safety & Precautions

• ⚠️ The rear brakes use an electronic parking brake (EPB); you must put the EPB into service mode before pushing pistons back.
• ⚠️ Work on level ground; use jack stands under approved lift points—never rely on a floor jack alone.
• ⚠️ Do not press the brake pedal while a caliper is removed.
• ⚠️ Brake dust and cleaner are irritating; wear a mask and safety glasses.
• ⚠️ If brake fluid level rises near “MAX” when compressing pistons, remove a small amount with a syringe—do not overflow onto paint.

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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
• 17mm wheel bolt socket
• Torque wrench (20-200 Nm range)
• Ratchet (3/8")
• Ratchet (1/2")
• Breaker bar (1/2")
• Torx T30 bit
• Torx T25 bit
• Socket set (10mm-21mm)
• Triple-square bit set (M10-M14)
• Hex bit set (5mm-8mm)
• Flat trim tool
• Caliper hanger hook
• Brake piston compression tool (specialty)
• OBD scan tool with EPB service mode (specialty)
• Wire brush
• Rubber mallet
• Shop rags
• Nitrile gloves
• Safety glasses
• Dust mask

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Rear brake pad set (with hardware) - Qty: 1
• Rear brake rotors - Replace in pairs - Qty: 2
• Rear pad wear sensor (if equipped) - Qty: 1
• Rear caliper carrier bolts (one-time-use) - Qty: 4
• Rotor retaining screw - Qty: 2
• Brake lubricant (silicone/ceramic) - Qty: 1
• Brake cleaner - Qty: 2 cans
• Anti-seize compound - Qty: 1

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📋 Before You Begin

• Park on level ground, turn the steering straight, and place wheel chocks at the front wheels.
• Make sure the EPB is released before lifting the rear.
• Plan your EPB service mode method:
  • Use an OBD scan tool with EPB service mode (specialty) (preferred).
• Loosen rear wheel bolts slightly (about 1/4 turn) with a 17mm wheel bolt socket before lifting.
• Open the hood and check the brake fluid level so you can watch it while compressing pistons.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Put the EPB into service mode

• Connect your OBD scan tool with EPB service mode (specialty) and run the function for Rear Parking Brake Service Mode (it retracts/unwinds the parking brake motors).
• If your tool asks, select Open/Release (not Close/Apply).
• Service mode prevents caliper damage.

Step 2: Lift the rear and remove both rear wheels

• Lift the rear with a floor jack (rated 3-ton minimum) and support with jack stands (rated 3-ton minimum).
• Remove the wheel bolts using a 17mm wheel bolt socket and set wheels aside.

Step 3: Remove the rear caliper (do not hang by the hose)

• Remove the outer spring clip (if equipped) using a flat trim tool.
• Remove the caliper guide pin bolts using the correct hex bit or triple-square bit (varies by caliper version on this platform).
• Lift the caliper off the bracket and hang it from the suspension using a caliper hanger hook.

Step 4: Remove old pads and hardware

• Slide the inner and outer pads out by hand.
• Remove pad abutment clips (stainless guides) using a flat trim tool.
• If a wear sensor is present, disconnect it carefully using a flat trim tool (don’t pull on the wire).

Step 5: Remove the caliper carrier (bracket)

• Remove the carrier bolts using a breaker bar (1/2") with the correct triple-square bit.
• Set the carrier aside.
• When reinstalling later, use new bolts and Torque to 90 Nm (66 ft-lbs) + 90°.

Step 6: Remove the rotor

• Remove the rotor retaining screw using a Torx T30 bit.
• Pull the rotor off; if stuck, tap the rotor hat with a rubber mallet until it breaks free.

Step 7: Clean the hub and prep for the new rotor

• Clean the hub face with a wire brush and spray with brake cleaner.
• Apply a very thin film of anti-seize compound to the hub face (avoid wheel studs/bolt seats and rotor braking surface).

Step 8: Install the new rotor

• Clean both sides of the new rotor with brake cleaner and shop rags (removes shipping oil).
• Install rotor onto the hub and install a new retaining screw using a Torx T30 bit.
• Torque to 4 Nm (35 in-lbs).

Step 9: Reinstall the caliper carrier

• Position the carrier and install new carrier bolts by hand first.
• Tighten using a torque wrench and the correct triple-square bit: Torque to 90 Nm (66 ft-lbs) + 90°.

Step 10: Compress the rear caliper piston

• Check the brake fluid reservoir level again before compressing.
• Use a brake piston compression tool (specialty) to slowly push the piston fully back into the caliper.
• Go slow to avoid fluid overflow.

Step 11: Install new pad hardware and pads

• Install new abutment clips into the carrier (if provided) by hand.
• Apply a thin layer of brake lubricant where the pad ears slide on the clips (do not get lube on pad friction material).
• Install the new inner and outer pads.
• If equipped, connect the new wear sensor.

Step 12: Reinstall the caliper

• Place the caliper over the new pads.
• Install the guide pin bolts using the correct hex bit or triple-square bit, then tighten with a torque wrench: Torque to 35 Nm (26 ft-lbs).
• Reinstall the outer spring clip (if equipped) using a flat trim tool.

Step 13: Repeat on the other rear side

• Repeat Steps 3 through 12 on the opposite rear wheel.

Step 14: Exit EPB service mode

• Use the OBD scan tool with EPB service mode (specialty) to run Close/Apply (or “End Service Mode”) so the parking brake motors recalibrate.

Step 15: Reinstall wheels and lower the vehicle

• Install wheels and hand-thread all wheel bolts.
• Snug the bolts using a 17mm wheel bolt socket.
• Lower the vehicle, then torque wheel bolts in a star pattern using a torque wrench: Torque to 150 Nm (111 ft-lbs).

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✅ After Repair

• With the engine OFF, pump the brake pedal 10-15 times until it feels firm.
• Check brake fluid level and top up only if needed (use the correct DOT 4 fluid specified for your Q5).
• Start the engine and confirm normal pedal feel; test the EPB apply/release.
• Do a careful road test and listen for grinding or pulling.
• Pad bed-in (break-in): make 6-10 medium stops from 60→20 km/h, letting brakes cool slightly between stops; avoid hard stops for the first 200 km.

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💰 DIY vs Shop Cost

Shop Cost: ₹18,000-₹35,000 (parts + labor)

DIY Cost: ₹9,000-₹22,000 (parts only)

You Save: ₹9,000-₹13,000 by doing it yourself!

Shop labor rates vary but typically run ₹2,000-₹4,000/hour. This repair takes a shop approximately 2-3 hours.

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🎯 Ready to get started?

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