2011-2015 Audi R8 & 2011-2013 Gallardo Rear Right Brake Caliper Guide
This guide covers the rear right brake caliper for the Audi R8 and Lamborghini Gallardo, focusing on symptoms, used part inspection, and the critical difference between standard and ceramic brakes.
- The most critical factor is brake type: calipers for standard iron brakes and optional Carbon Ceramic brakes are NOT interchangeable.
- A seized caliper is a common failure, leading to symptoms like the car pulling to one side, a burning smell, and uneven brake pad wear.
- When buying a used caliper, thoroughly inspect the piston boots for tears and ensure the bleeder screw is not seized.
- This part is shared between the Audi R8 and Lamborghini Gallardo, but always verify the OEM part number (e.g., 420615408K) to ensure compatibility.
Critical: Standard (Iron) vs. Carbon Ceramic Brakes
Warning: This is the most important factor when buying this part. The rear right brake caliper for a 2011-2015 Audi R8 or 2011-2013 Lamborghini Gallardo is specific to the type of brake system installed. A caliper designed for standard iron rotors will NOT fit a vehicle equipped with the optional Carbon Ceramic Brake (CCB) system, and vice-versa. The mounting points and piston sizes are different. Always verify which brake system your vehicle has before purchasing a replacement caliper.
Vehicles with standard brakes use heavy cast-iron rotors. The optional Carbon Ceramic brakes use a much lighter, larger, and more expensive composite rotor material that is highly resistant to heat and brake fade. While the calipers may look similar, they are not interchangeable. Using the wrong caliper can lead to catastrophic brake failure.
Symptoms of a Failing Rear Brake Caliper
A failing brake caliper can create dangerous situations and should be addressed immediately. Here are the most common signs:
🎬 Watch: Learn how to spot a bad brake caliper- Vehicle Pulling to One Side: When braking, if the car pulls to the left or right, it can indicate a stuck caliper. A seized caliper on the right side may cause the car to pull right, or if it's not applying pressure, cause it to pull left as the other brakes do more work.
- Spongy or Soft Brake Pedal: If the caliper's seals fail and leak brake fluid, it introduces air into the hydraulic system. This results in a pedal that feels soft, spongy, or goes further to the floor than usual.
- Visible Brake Fluid Leak: Puddles of a clear-to-yellowish fluid near the rear right wheel are a tell-tale sign of a leaking caliper or brake line.
- Uneven Brake Pad Wear: A sticking caliper piston can cause the inner or outer brake pad to wear down much faster than the other. When you inspect the pads, if one is significantly thinner, the caliper is a likely culprit.
- Squealing or Grinding Noises: While often a sign of worn pads, persistent grinding or squealing can also be caused by a caliper that isn't retracting properly, keeping the pad in constant, light contact with the rotor.
- Burning Smell or Excessive Heat: After a drive, a seized caliper can generate extreme heat from the constant friction. You may notice a strong burning smell from the rear right wheel area, and the wheel itself may be significantly hotter than the others.
Known Issues, TSBs, and Recalls
While there are no specific recalls for the rear brake calipers on the 2011-2015 Audi R8 or 2011-2013 Lamborghini Gallardo within the specified years, there are related service items and recalls to be aware of:
- Lamborghini Gallardo (2007-2009) Carbon-Ceramic Brake Screw Recall (NHTSA 13V471000): Affecting earlier models, this recall was for stainless-steel screws securing the brake rotors (not calipers) which could fail in salty conditions. While outside the 2011-2013 range, it highlights the sensitivity of these brake systems to component failure.
- Lamborghini Gallardo (2011-2014) ECU Software Recall (NHTSA 18V-833): An issue where the ECU software could fail to store trouble codes after turning the ignition off, preventing warning lamps for systems like brakes from illuminating.
- Audi R8 Ceramic Brake TSBs: Audi has issued several Technical Service Bulletins (TSBs) related to ceramic brakes, generally requiring dealers to open a technical assistance ticket for any repairs on these systems, indicating their complexity.
Pro Tip: The braking systems on the Audi R8 and Lamborghini Gallardo are very similar. In many cases, parts like brake pads are interchangeable between the platforms, sometimes offering a cost-saving opportunity (e.g., using Audi RS6 pads on a Gallardo). However, always verify specific part numbers before purchasing.
Buying a Used Rear Brake Caliper: What to Check
A used OEM caliper can be a great value, but careful inspection is critical for safety. Here’s what to look for:
- Confirm Part Numbers: Match the part number on the caliper to your required number. Known OEM part numbers for the standard rear right caliper include 420615408A, 420615408D, and 420615408K. Verify compatibility with the seller.
- Inspect the Piston Boots: The rubber boots around the pistons are crucial. Look for any rips, cracks, or signs of deterioration. A torn boot allows moisture and dirt in, which will cause the piston to seize. Do not buy a caliper with damaged boots.
- Check the Bleeder Screw: Ensure the bleeder screw is not stripped, broken off, or seized. Ask the seller if it turns freely. A broken bleeder screw can make the caliper useless without difficult repairs.
- Look for Corrosion and Damage: Inspect the caliper body for heavy corrosion, cracks, or damage from an accident. Pay special attention to the mounting holes and the area where the brake line connects.
- Examine the Piston Condition (if possible): Look at the visible part of the pistons. They should be smooth and free of pitting or rust. A seized piston is the most common failure mode.
- Ask About the Donor Vehicle: Inquire about the mileage and condition of the car the part came from. A caliper from a low-mileage, non-accident vehicle is always preferable.
Cost of Replacement
Prices can vary based on supplier and location, but this provides a general comparison for a single rear right caliper for a standard brake system.
| Part Type | Estimated Cost | Notes |
|---|---|---|
| New OEM | $700 - $1,200+ | Purchased from an Audi or Lamborghini dealership. Guarantees fit and quality but is the most expensive option. |
| New Aftermarket | $250 - $500 | Limited availability for these models. Quality can vary significantly. Sticking with a rebuilt OEM unit is often a better choice. |
| Used OEM | $150 - $450 | A cost-effective option. Price depends on condition and seller. Requires careful inspection. |
| Remanufactured | $200 - $600 | A used caliper that has been rebuilt with new seals and pistons. A good balance of cost and reliability. |
| Shop Labor | $150 - $350 | Includes installation and bleeding the brake system. Labor rates for these vehicles are typically higher. |
Replacement Overview
Replacing a brake caliper is a job for an experienced DIY mechanic or a professional. It involves the hydraulic brake system, which must be bled properly to ensure safety.
- Difficulty: 4 out of 5
- Estimated Time: 1.5 - 2.5 hours
- Key Steps: The process involves safely lifting the vehicle, removing the wheel, unbolting the brake line (be prepared for fluid leakage), removing the caliper mounting bolts, and swapping the caliper. The most critical step is bleeding the brake system afterward to remove all air. 🎬 See this step-by-step Audi R8 brake installation guide An improper bleed job will result in a spongy pedal and poor braking performance.
Frequently Asked Questions (FAQ)
Can I just rebuild my existing caliper?
Yes, rebuilding is often possible if the caliper body and pistons are in good condition. Rebuild kits containing new seals and boots are available. However, if a piston is seized or pitted from corrosion, it's often more cost-effective to replace the entire unit with a used or remanufactured one.
Do I need to replace calipers in pairs?
While not strictly necessary like brake pads or rotors, it is often recommended. If one caliper has failed due to age or contamination, the other side may not be far behind. Replacing them in pairs ensures even braking performance and prevents a repeat repair job in the near future.
What is the difference between the main caliper and the parking brake caliper?
On many Audi R8 and Lamborghini Gallardo models, the rear caliper is a single unit that performs both main braking and parking brake functions, often using an integrated electric motor. Some configurations, however, may use a smaller, separate mechanical caliper for the parking brake. It is crucial to identify which system your car has. This guide refers to the main service brake caliper which often includes the parking brake function.
Will a caliper from a Lamborghini Gallardo fit my Audi R8?
Yes, in many cases they are the exact same part, manufactured by Brembo for both vehicles. However, you must always cross-reference the OEM part number (e.g., 420615408K) to guarantee a perfect match, as there can be minor variations in finish or hardware between the brands for different model years.
Helpful Videos
Technical Specifications
OEM Part Numbers: 420615408A 420615408D 420615408K 42B615408A
Position: Rear Right. Brake System Compatibility: Standard Iron Rotors (Non-Carbon Ceramic). Manufacturer: Brembo (OEM supplier).
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Audi R8:
- Lamborghini Gallardo: