Choosing the Right Brake Pads for Your G37

The Infiniti G37, a hallmark of Nissan's luxury division, represents a blend of sophisticated design and formidable performance. Succeeding the G35, this model, especially with its potent 3.7L VQ37VHR V6 engine, demands a braking system that can match its capabilities. Whether you're navigating city streets or enjoying a spirited drive on winding country roads, reliable and effective brakes are paramount for your safety and the longevity of your vehicle. Selecting the correct brake pads is a crucial decision that directly impacts your G37's stopping power, brake feel, and overall driving experience.

While it might seem straightforward, the world of brake pads offers a surprising variety, each designed for different driving conditions and preferences. Understanding these options, knowing when your pads need replacing, and even undertaking a DIY replacement can save you money and keep your G37 performing at its best. This comprehensive guide will delve into everything you need to know about choosing and maintaining the perfect brake pads for your cherished G37.

Understanding Your G37's Braking System

Before diving into pad types, it's essential to appreciate the components that work together to bring your G37 to a halt. The braking system is a hydraulic marvel, converting the force of your foot on the pedal into immense pressure on the wheels. At the heart of this system are the brake pads and rotors. When you press the pedal, brake fluid transmits pressure to the calipers, which then squeeze the brake pads against the spinning rotors. This friction is what slows down and stops your vehicle. Given the G37's performance orientation, its braking system is engineered for responsiveness and durability, making the quality of its components critical.

The Role of Brake Pads

Brake pads are consumable components designed to wear out over time. They are essentially the sacrificial part of the braking system, designed to absorb the friction and heat generated during braking, protecting the more expensive rotors. The material composition of the pads dictates their performance characteristics, including stopping power, noise levels, dust production, and longevity. Choosing the right material for your driving style is key to optimising your G37's braking performance.

Types of Brake Pads Available for Your G37

While any brake pad designed for the G37 will technically fit, the performance and characteristics vary significantly based on their material. Here are the most common types you'll encounter:

1. Organic Non-Asbestos (NAO) Brake Pads

These pads are typically made from a mixture of non-metallic materials like glass, rubber, carbon, and Kevlar, bound together with resins. They are often the quietest and produce less dust.

• Pros: Quiet operation, gentle on brake rotors, good initial bite, affordable.
• Cons: Lower temperature resistance, prone to fade under heavy braking, can wear faster, not ideal for aggressive driving.
• Best For: Daily commuting, drivers prioritising comfort and quietness over high performance.

2. Semi-Metallic Brake Pads

Comprising anywhere from 30% to 70% metals like copper, iron, steel, and other composites, semi-metallic pads are known for their robust performance and heat dissipation. They are a popular choice for many modern vehicles, including performance-oriented cars like the G37.

• Pros: Excellent stopping power across a wide temperature range, good heat dissipation, durable.
• Cons: Can be noisier than organic or ceramic pads, produce more brake dust, can cause more wear on rotors due to higher abrasiveness.
• Best For: Drivers seeking improved braking performance, spirited driving, or those who occasionally push their G37.

3. Ceramic Brake Pads

Ceramic pads are made from a blend of ceramic fibres, fillers, and bonding agents, similar to the ceramic used in pottery. They are considered a premium option.

• Pros: Very quiet operation, minimal brake dust (and the dust produced is lighter in colour, less noticeable), excellent performance in various temperatures, long-lasting.
• Cons: More expensive than other types, may require more heat to reach optimal performance, potentially less initial bite than semi-metallic pads.
• Best For: Drivers who want a clean wheel, quiet operation, and consistent performance without sacrificing too much stopping power, often for luxury vehicles.

Comparative Table of Brake Pad Types

Genuine Infiniti vs. Aftermarket Brake Pads

When considering brake pads for your Infiniti G37, you'll encounter two primary categories: genuine Infiniti (OEM - Original Equipment Manufacturer) parts and aftermarket alternatives.

• Genuine Infiniti Parts: These are the parts that came with your G37 from the factory. They are designed by Infiniti specifically for your vehicle's specifications, ensuring a perfect fit, optimal performance, and adherence to the manufacturer's quality standards. They often come with a warranty when installed by an authorised retailer. The G37, being part of Nissan's luxury division, benefits from high-quality OEM components tailored to its performance characteristics.
• Aftermarket Parts: These are produced by third-party manufacturers and are designed to fit and function in your G37. The quality and performance of aftermarket pads can vary widely. Some aftermarket brands specialise in performance braking, offering superior stopping power for track use, while others focus on affordability or specific characteristics like low dust or quiet operation.

While genuine parts offer peace of mind regarding compatibility and expected performance, aftermarket options can provide greater choice in terms of price, specific performance attributes (e.g., enhanced track performance, ultra-low dust), and brand reputation. It's crucial to research reputable aftermarket brands known for quality and reliability, especially for a high-performance vehicle like the G37.

When to Replace Your G37 Brake Pads

One of the most critical aspects of brake maintenance is knowing when to replace your pads. Ignoring worn brake pads can lead to significantly reduced stopping power, damage to your rotors, and potentially dangerous driving conditions. The Infiniti G37, like any vehicle, will exhibit several tell-tale signs when its brake pads are nearing the end of their life. Common issues for the G37 include:

• Noisy Brakes: A common symptom of worn pads is a high-pitched squealing sound when you apply the brakes. Many pads have a built-in wear indicator – a small metal tab that scrapes against the rotor when the pad material is low, producing this sound. A grinding noise, however, indicates severe wear, meaning the metal backing plate of the pad is now rubbing against the rotor, which can cause significant damage.
• Vibrating Brake Pedals: If you feel a pulsation or vibration through the brake pedal when stopping, it often points to warped brake rotors, which can be exacerbated by severely worn or unevenly worn brake pads. While pads don't warp, their uneven wear can contribute to rotor issues.
• Poor Brake Response: If your G37 feels like it's taking longer to stop, or if the brake pedal feels spongy and goes further to the floor than usual, your brake pads may be severely worn, or there could be an issue with your brake fluid or lines.
• Score Marks on Brake Rotors: Visible score marks or deep grooves on your brake rotors are a clear indication that your pads are either worn out, or foreign debris has become lodged between the pad and rotor. This suggests an immediate need for inspection of both the G37 brake pad set and the brake disc.
• Visual Inspection: The simplest way to check is to visually inspect your brake pads. Through the wheel spokes, you can often see the brake caliper and pad. If the pad material looks thin (typically less than 3mm or 1/8th of an inch), it's time for replacement.

Regular checks, perhaps during tyre rotations or oil changes, are advisable to catch these issues early.

DIY Brake Pad Replacement for Your Infiniti G37

Replacing brake pads on an Infiniti G37 can be a rewarding DIY project if you have the right tools and a basic understanding of automotive mechanics. However, it's crucial to prioritise safety above all else. If you're uncomfortable at any point, it's always best to consult a professional mechanic.

Tools You'll Need:

• Car jack
• Jack stands (absolutely essential for safety)
• Wheel chocks
• 12mm wrench or socket (for caliper bolts)
• 22mm socket (for lug nuts)
• Rubber mallet (optional, for stubborn rotors/calipers)
• Pick or small screwdriver (for spring clips or general cleaning)
• C-clamp or brake caliper piston compression tool
• Wire brush
• Brake cleaner
• High-temperature brake grease/lube (for caliper pins and pad backing)
• Torque wrench (highly recommended for tightening lug nuts and caliper bolts to specification)
• Optional: Bucket or wire to hold the caliper (to prevent strain on brake line)

Step-by-Step Guide:

Step 1: Preparation and Safety First
Park your G37 on a flat, level surface. Engage the parking brake. Open the bonnet and locate the brake fluid reservoir. Under the panel indicated by the blue arrow, you should see the brake fluid reservoir. Remove some brake fluid if it's at the 'Max' line, as compressing the caliper pistons will push fluid back into the reservoir, potentially causing an overflow. Loosen the lug nuts on the wheel you plan to work on, but do not remove them yet.

Step 2: Lift and Secure Your G37
Using your car jack, lift the vehicle until the wheel is off the ground. Place jack stands securely under the designated jacking points of your G37. Never rely solely on the jack. Once the car is safely supported, you can remove the lug nuts completely and take off the wheel.

Step 3: Access the Brake Caliper
The brake caliper assembly will now be visible. Depending on your G37's specific brake setup (e.g., Akebono brakes on Sport models), there might be two bolts securing the caliper to the caliper bracket, or it might be a sliding caliper with a single pivot bolt and a sliding pin. Typically, you'll need to remove the lower 12mm bolt to pivot the caliper upwards, or both the 12mm bolts to completely remove it from the bracket. Some G37 models might have a 19mm or 22mm bolt for the caliper bracket itself. Be careful not to damage the brake line.

Step 4: Remove Old Brake Pads
Once the caliper is loosened or pivoted, you can slide out the old brake pads. They might be held in place by retaining clips or springs. Note their orientation for proper reinstallation of the new pads. If the pads are stuck, a rubber mallet or gentle prying with a screwdriver can help.

Step 5: Inspect and Clean
Inspect your brake rotors for any deep grooves, scoring, or uneven wear. If the rotors are significantly worn or warped, they should be replaced or machined (turned) by a professional. Clean the caliper bracket, caliper pins, and any shim surfaces with a wire brush and brake cleaner. Ensure the caliper pins slide freely; if not, clean and lubricate them with high-temperature brake grease.

Step 6: Compress the Caliper Piston(s)
Before installing new, thicker pads, you need to push the caliper piston(s) back into the caliper housing to create space. Use a C-clamp or a dedicated brake caliper piston compression tool. Place an old brake pad against the piston to protect it while compressing. Compress slowly and steadily. Keep an eye on the brake fluid reservoir to ensure it doesn't overflow.

Step 7: Install New Brake Pads
Apply a thin layer of high-temperature brake grease to the backing plates of the new brake pads (but not the friction material!) and to the caliper sliding pins. Install the new pads into the caliper bracket, ensuring they sit correctly in their respective slots. Reinstall any clips or springs.

Step 8: Reassemble the Caliper
Carefully lower or reattach the brake caliper over the new pads and rotor. Reinsert and tighten the caliper bolts. Torque these bolts to your G37's specified torque settings (consult your service manual if unsure; typically around 30-45 ft-lbs for caliper guide pins). Ensure everything is snug and secure.

Step 9: Reinstall Wheel and Final Checks
Reinstall the wheel, hand-tighten the lug nuts, and then lower the G37 off the jack stands. Once the car is on the ground, tighten the lug nuts in a star pattern to the factory-specified torque (typically around 80-90 ft-lbs for the G37). Repeat the process for all remaining wheels.

Step 10: Pump the Brake Pedal and Bed-In
Before driving, get into the car and slowly pump the brake pedal several times until it feels firm. This re-seats the caliper pistons against the new pads. Check the brake fluid level and top it up if necessary. Finally, perform the "bedding-in" procedure for your new pads. This involves a series of moderate stops from increasing speeds to properly transfer pad material to the rotor, ensuring optimal performance and longevity. Follow the specific bedding-in instructions provided by your brake pad manufacturer, as they can vary.

Associated Brake Components: Rotors and Fluid

While replacing brake pads, it's an ideal time to inspect other critical components of your G37's braking system:

• Brake Rotors (Discs): As mentioned, these can become warped or scored. For optimal braking, it's often recommended to replace or resurface rotors when replacing pads, especially if there are visible issues or if you're upgrading to a different pad type. The G37's performance benefits from healthy, true rotors.
• Brake Fluid: This hydraulic fluid transmits force from your pedal to the calipers. Over time, brake fluid can absorb moisture, leading to a lower boiling point and reduced braking performance. It should be flushed and replaced according to Infiniti's recommended maintenance schedule (typically every 2-3 years). Your G37 will likely use DOT 3 or DOT 4 fluid.

Common Infiniti G37 Braking Issues & Troubleshooting

Even with new pads, issues can arise. Here's how to troubleshoot some common G37 braking complaints:

• Squealing after new pads: This can be normal during the bedding-in process. If it persists, ensure shims were installed correctly, and anti-squeal compound was applied where recommended. Improper lubrication of caliper pins can also cause noise.
• Grinding noise: If this occurs immediately after pad replacement, check for debris between the pad and rotor or confirm pads are seated correctly. If it's a new issue with older pads, it's a sign of metal-on-metal contact, indicating severely worn pads and likely rotor damage.
• Soft or spongy pedal: This usually indicates air in the brake lines, requiring bleeding of the brake system. It could also be a sign of a failing master cylinder or a brake fluid leak.
• Pulling to one side during braking: This suggests uneven braking force, possibly due to a seized caliper, a collapsed brake hose, or unevenly worn pads/rotors on one side.

Maintenance Tips for Brake Longevity

• Regular Inspections: Periodically check your brake pads for wear and your rotors for signs of damage.
• Fluid Checks: Ensure your brake fluid is at the correct level and consider a flush every few years.
• Drive Sensibly: Avoid aggressive braking when possible. Smooth, progressive braking reduces wear on pads and rotors.
• Listen to Your Car: Pay attention to any unusual noises or changes in brake pedal feel. Early detection can prevent more costly repairs.

Frequently Asked Questions (FAQs)

How long do G37 brake pads typically last?

The lifespan of G37 brake pads varies significantly based on driving style, road conditions, and the type of pads installed. Generally, front pads might last 30,000-70,000 miles, while rear pads can last longer, often 50,000-100,000 miles. Aggressive driving or frequent city driving with lots of stop-and-go traffic will shorten their lifespan.

Do I need to replace my rotors every time I replace my brake pads?

Not necessarily, but it's highly recommended, especially if the rotors show signs of wear (grooves, warping, or are below minimum thickness). At the very least, rotors should be resurfaced (machined) to provide a fresh, flat surface for the new pads to bed into. For performance vehicles like the G37, many enthusiasts opt for full replacement to ensure optimal braking performance and avoid potential issues.

What is 'bedding-in' new brake pads?

Bedding-in, also known as 'burnishing,' is a crucial process that transfers a thin, even layer of friction material from the new brake pads onto the brake rotors. This process optimises braking performance, reduces noise, and ensures maximum pad life. It typically involves a series of controlled stops from various speeds without coming to a complete stop, followed by a cooling period.

Can I mix different types of brake pads on my G37?

It is strongly advised against mixing different types of brake pads (e.g., semi-metallic on one wheel and ceramic on another, or different types front vs. rear, unless specifically designed as a kit). This can lead to uneven braking performance, unpredictable stopping distances, and potentially dangerous driving conditions. Always replace pads in axle sets (both front, or both rear) with the same type and brand.

Why are my new G37 brakes noisy after replacement?

New brakes can be noisy for a few reasons. Initially, some squealing is common during the bedding-in period as the pads and rotors adapt. If the noise persists, it could be due to: improper installation (e.g., missing shims, inadequate lubrication of caliper pins), an incompatible pad/rotor combination, or simply the characteristic of the chosen pad material (semi-metallic pads can be inherently noisier than ceramic).

Conclusion

Choosing the right brake pads for your Infiniti G37 is more than just a matter of fitment; it's about matching the components to your driving style and ensuring your vehicle's safety and performance. Whether you opt for the quiet, clean operation of ceramic pads, the robust stopping power of semi-metallic pads, or the gentle touch of organic pads, understanding their characteristics is key. Regular inspection, timely replacement, and proper installation are essential for maintaining your G37's exceptional braking capabilities. By taking a proactive approach to your G37's brake maintenance, you ensure that this executive sports coupe continues to offer the confidence and control you expect, stop after stop.

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