A Guide to Replacing Disc Brake Pads on the 2003-2007 Jaguar XJ
Choosing the right brake pads for your X350-generation Jaguar XJ involves more than just price.
- Identify your brake system: Standard or Brembo (on XJR/Super V8 models), as the pads are not interchangeable.
- Rear pad replacement requires putting the Electronic Parking Brake (EPB) into a special service mode to avoid damage.
- Switching to aftermarket ceramic pads (like Akebono) can significantly reduce the heavy brake dust common with OEM pads.
- If your brake warning light is on, you must also purchase and install new single-use brake wear sensors.
Understanding Your XJ's Brake System
Before buying parts, you need to know which brake system your 2003-2007 Jaguar XJ has. There are two main types:
- Standard Brakes: Found on most XJ6, XJ8, and Vanden Plas models. These are excellent for daily driving.
- Brembo Brakes: Factory-equipped on high-performance models like the XJR and Super V8. These calipers are larger and use different, model-specific brake pads designed for higher performance.
Always verify which system you have before ordering. Supercharged models almost always have Brembo brakes, but it's best to check visually.
Symptoms of Worn Brake Pads
Failing brake pads give clear warning signs. Ignoring them can lead to more expensive repairs, like needing to replace the brake rotors.
- Squealing or Grinding Noises: A high-pitched squeal when you brake is the sound of the built-in wear indicator. A harsher grinding noise means the pad material is completely gone, and metal is grinding on metal.
- Brake Warning Light: Your XJ is equipped with electronic wear sensors. When the pad material gets too low, the sensor makes contact with the rotor, completes a circuit, and illuminates a warning on your dashboard.
- Longer Stopping Distances: If you notice the car taking longer to stop than it used to, your brake pads may be worn out and unable to create enough friction.
- Vibration or Pulsing: While this can also be a sign of warped rotors, severely worn pads can cause vibrations felt in the brake pedal or steering wheel.
Known Issue: Brake Pipe Corrosion Recall
NHTSA issued recall 09V144000 (Jaguar recall J012) for 2004 model year XJs built between January 2003 and January 2004. An underbody pad could trap moisture and cause the rear brake *pipes* (lines) to rust, potentially leading to a loss of braking. The fix involved dealers removing the pad and inspecting or replacing the brake lines. While this recall work should be complete, it's wise for any owner of a 2004 model to be aware of this history.
Choosing the Right Aftermarket Brake Pads
Original Jaguar brake pads, often made by companies like Mintex, perform well but are known for creating a lot of brake dust that can make your wheels look dirty. Aftermarket pads offer a chance to change your car's braking feel and reduce dust.
Daily Driver & Low-Dust Options
For most owners, a quality ceramic brake pad is the best choice. They offer a great balance of stopping power, low noise, and significantly less dust than original pads.
- Akebono: Frequently recommended by XJ owners in forums as a top-tier ceramic pad that provides excellent stopping power with minimal dust and no noise.
- PowerStop Z17 Evolution: A popular and affordable ceramic pad kit that includes new hardware and is designed for low-dust daily driving.
- Bosch, TRW, Centric: These brands offer reliable OEM-quality pads that meet or exceed factory performance for normal use.
Performance & High-Performance Options
If you have a supercharged model or simply want more aggressive braking performance, these brands are popular choices.
- Brembo: As the original equipment supplier for XJR models, Brembo offers pads that restore factory performance. They are also available for standard brake systems.
- EBC Brakes: Offers different compounds, from the low-dust Redstuff ceramic pads to the higher-performance Yellowstuff pads for more aggressive driving.
- Hawk Performance: Another brand known for high-performance pads that offer increased stopping power, though they may produce more dust and noise than ceramic options.
Don't Forget the Wear Sensors
Brake pad wear sensors on the Jaguar XJ are single-use items. If your brake warning light is on, you must replace the sensor along with the pads. There is typically one sensor on the front axle and one on the rear. It's good practice to have them on hand before you start the job.
Installation Considerations
Replacing the front brake pads on an XJ is a straightforward job for a DIY mechanic. 🎬 Watch: Step-by-step guide to replacing front discs and pads. However, the rear brakes require a special procedure due to the Electronic Parking Brake (EPB).
CRITICAL: Electronic Parking Brake (EPB) Service Mode
You cannot simply push the rear caliper pistons back in. The EPB must be put into a special 'Service' or 'Maintenance' mode first. Attempting to force the piston back without doing this will damage the expensive EPB motor. This can be done with a Jaguar-specific diagnostic tool or by following a manual procedure that often involves disconnecting the battery at a specific point. After the new pads are installed, the system must be taken out of service mode and recalibrated. If you are not comfortable with this process, it is best to have a professional shop perform the rear brake replacement.
🎬 See this walkthrough for installing performance rear brakes.| Part Type | Estimated Cost |
|---|---|
| New Aftermarket Pads | $50 - $150 |
| New OEM Pads | $150 - $250 |
| Shop Labor | $100 - $180 |
| Total Professional Replacement | $250 - $430 |
Frequently Asked Questions (FAQ)
Do I have to replace the brake rotors with the pads?
Not always. If your rotors are smooth, not warped (no pulsing), and measure above the minimum thickness specification stamped on the rotor hub, you can often install new pads on them. However, for the best performance and longest life, installing new pads and rotors together is recommended.
My parking brake gives a 'FAULT' or 'CANNOT APPLY' message. Is this related to the pads?
It can be, but it's often an electronic issue. Low battery voltage is a very common cause for EPB faults on the X350. If the rear pads are worn down completely, it can also cause a fault. Finally, if the pads were replaced without properly calibrating the EPB system, it will cause an error.
🎬 Watch: How to replace and troubleshoot the electric parking brake.What is the difference between standard and Brembo pads?
Brembo pads are designed for the larger calipers on XJR and Super V8 models. They are shaped differently and are not interchangeable with the pads for the standard braking system. Brembo systems are built to handle more heat and provide greater stopping force for these heavier, more powerful cars.
Why are my wheels always covered in black dust?
This is a common characteristic of the original Jaguar brake pads and many other European performance pads. They use a softer, organic friction material that provides excellent stopping power but wears quickly and creates a lot of dust. Switching to a quality aftermarket ceramic pad, like those from Akebono, will dramatically reduce brake dust.
Helpful Videos
Technical Specifications
OEM Part Numbers: C2C39929 (Front, Standard) C2C23786 (Front, Standard) C2C40194 (Rear, Standard, to VIN G49700) C2C22316 (Rear, Standard, superseded by C2C40194)
Brake system can be standard single-piston calipers or larger Brembo multi-piston calipers on supercharged models. The system uses an Electronic Parking Brake (EPB) integrated into the rear calipers. Requires electronic brake pad wear sensors, one per axle.
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.
- Jaguar XJ:
- 🎬 Helpful Videos
- Understanding Your XJ's Brake System
- Symptoms of Worn Brake Pads
- Known Issue: Brake Pipe Corrosion Recall
- Choosing the Right Aftermarket Brake Pads
- Daily Driver & Low-Dust Options
- Performance & High-Performance Options
- Don't Forget the Wear Sensors
- Installation Considerations
- CRITICAL: Electronic Parking Brake (EPB) Service Mode
- Frequently Asked Questions (FAQ)
- 🎟️ Get 5% Off