🔧 A6 - Rear Brake Pad Replacement

You’ll remove the rear wheels, retract the electronic parking brake (EPB), swing the rear calipers up, and replace the pad set. On your A6, the rear calipers are tied to the EPB motor, so you must put the EPB into service mode before compressing the pistons.

Difficulty Level: Intermediate | Estimated Time: 1.5-3 hours

Assumption: Your A6 has an electronic parking brake (most do).

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⚠️ Safety & Precautions

• 🛑 Support the car with jack stands; never rely on a jack.
• 🛑 Keep fingers clear of the caliper/rotor; pinch hazard.
• 🛑 Do not press the brake pedal with a caliper removed.
• 🛑 Use EPB service mode before pushing pistons back (prevents EPB damage).
• 🧪 Brake dust is harmful; use brake cleaner, not compressed air.
• 🔋 No battery disconnect is required, but keep ignition stable while using a scan tool.

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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 lug bolt socket
• Torque wrench (20–200 Nm range)
• Ratchet
• 7mm hex bit socket
• 13mm socket
• Breaker bar
• Flat trim tool
• Brake caliper piston compressor tool (specialty)
• Small wire brush
• Bungee cord
• OBDeleven or VCDS scan tool (specialty)
• Nitrile gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Rear brake pad set - Qty: 1
• Brake pad wear sensor - Qty: 0-1 (if equipped)
• Brake caliper guide pin bolt kit - Qty: 1 (recommended)
• Brake caliper carrier bolt kit - Qty: 1 (recommended)
• Brake lubricant paste - Qty: 1
• Brake cleaner - Qty: 1

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📋 Before You Begin

• Park on level ground, wheels straight, and place wheel chocks at the front wheels.
• Make sure the EPB is not actively applying/releasing repeatedly (no doors opening/closing cycles while working).
• Open the hood and locate the brake fluid reservoir; you’ll watch the level as pistons retract.
• Set the rear EPB to service mode using a scan tool (this “backs off” the parking brake motor).

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Put the electronic parking brake into service mode

• Connect your OBDeleven or VCDS scan tool (specialty) to the OBD port.
• Turn ignition ON (engine OFF).
• Command the EPB to open/service position:
  • Use the scan tool function for Parking Brake > Basic Settings > Open/Release for pad replacement.
  • If you don’t see it, look for “Brake pad replacement mode”.

Step 2: Loosen rear wheel bolts and raise the rear

• Use a 17mm lug bolt socket and breaker bar to crack the rear wheel bolts loose 1/4 turn.
• Lift the rear with a floor jack (rated 3-ton minimum) and support with jack stands (rated 3-ton minimum).
• Remove the wheel bolts completely with the 17mm lug bolt socket and remove both rear wheels.

Step 3: Access the rear caliper and remove the caliper guide bolts

• Turn the steering slightly if needed for access (rear access is usually straight-on).
• If there are small plastic caps over the caliper slide bolts, pop them off using a flat trim tool.
• Hold the slide pin if it wants to spin using a 13mm socket (as needed), then remove the caliper guide bolts using a 7mm hex bit socket.

Step 4: Lift the caliper off and support it

• Carefully lift the caliper off the bracket by hand.
• Hang the caliper from the suspension using a bungee cord.
• Do not let the caliper hang by the brake hose.

Step 5: Remove old pads and prep contact points

• Slide the inner and outer pads out of the bracket by hand.
• Clean pad abutment/contact areas on the bracket using a small wire brush.
• Spray and wipe with brake cleaner (use safety glasses and nitrile gloves).

Step 6: Compress the rear caliper piston

• Check the brake fluid reservoir level under the hood before compressing.
• Use a brake caliper piston compressor tool (specialty) to push the piston straight back slowly until fully seated.
• Go slowly; fast compression can overflow the reservoir.

Step 7: Install the new rear pads

• Apply a thin layer of brake lubricant paste to pad backing plates and pad “ears” where they touch the bracket.
• Do not get lubricant on pad friction material or the rotor.
• Install the new inner and outer pads into the bracket by hand.
• If equipped with a wear sensor, install the brake pad wear sensor now and route it the same way as original.

Step 8: Reinstall the caliper and torque fasteners

• Lower the caliper over the new pads by hand.
• Install the caliper guide bolts using the 7mm hex bit socket and ratchet.
• Final tighten with a torque wrench.
• Torque to factory specification for rear caliper guide bolts and carrier bolts (fastener specs vary by brake package).

Step 9: Reinstall wheels and torque wheel bolts

• Reinstall both rear wheels and hand-thread all wheel bolts.
• Lower the car to the ground using the floor jack (rated 3-ton minimum).
• Tighten wheel bolts in a star pattern using a torque wrench: Torque to 120 Nm (89 ft-lbs).

Step 10: Exit EPB service mode and run EPB “close/adapt”

• With ignition ON, use the OBDeleven or VCDS scan tool (specialty) to command:
  • Parking Brake > Basic Settings > Close/Apply after pad replacement
• Clear any EPB/brake-related faults if they set during service.

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✅ After Repair

• With the car on the ground, pump the brake pedal 10–15 times until it feels firm.
• Check brake fluid level and top off only if needed (use the correct spec fluid shown on the reservoir cap).
• Test the electronic parking brake apply/release function in your driveway.
• Do a cautious road test: slow stops first, then normal stops.
• Pad bedding (break-in): make 8–10 moderate stops from ~30 mph to ~5 mph, allowing short cool-down between stops.

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💰 DIY vs Shop Cost

Shop Cost: $350-$650 (parts + labor)

DIY Cost: $70-$220 (parts only)

You Save: $130-$580 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.5-2.5 hours.

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🎯 Ready to get started?

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