Infiniti G37 Suspension Refresh Guide: Restore That Legendary Ride
You’re taking your favorite off-ramp, feeling that familiar G37 confidence—but something’s off. The car leans more than it used to. Every bump feels harsher. That sharp, precise handling you fell in love with has slowly faded away.
Time takes its toll on every suspension. The V36 chassis G37 is a brilliant performance luxury coupe, but even the best-engineered components wear out. The good news is, a suspension refresh is one of the most rewarding projects you can tackle. It can completely transform your car, bringing back that crisp, planted feel and making every drive enjoyable again.
This guide will walk you through common signs of wear, your upgrade options—from simple OE replacements to high-performance coilovers—and how to choose what’s right for you.
Signs Your G37 Needs a Suspension Refresh
The factory suspension on the G37 does a great job balancing comfort and handling, but it’s a compromise. Over time, components wear down, and the car’s performance suffers. Here are the telltale signs it’s time for a refresh:
- Bouncy or Unsettled Ride: The car feels like it’s floating or takes too long to settle after hitting a bump. This often points to worn shock absorbers that can’t properly dampen spring movement.
- Excessive Body Roll: The car leans heavily in corners, making it feel less planted and stable.
- Nose Diving Under Braking: The front end dips noticeably when you hit the brakes, indicating the front shocks are worn.
- Uneven or Rapid Tire Wear: This is a classic sign of alignment issues caused by worn bushings, ball joints, or other suspension components.
- Clunks, Rattles, or Squeaks: These noises from the suspension when going over bumps or turning are usually a sign of worn bushings, sway bar end links, or a failing ball joint.
- The Car Sits Lower: If one corner of the car sits noticeably lower than the others, you likely have a broken spring or a completely failed shock.
Your Suspension Refresh Options
When it’s time to refresh, you have a few paths you can take, depending on your goals, budget, and how you use your car.
Option 1: Quick Strut Assemblies
This is the easiest, most straightforward refresh for a daily driver. A “quick strut” is a pre-assembled unit that includes the shock, coil spring, strut mount, and bearing plate all in one box . This is a huge time-saver because you don’t need to use a dangerous spring compressor to swap the old spring onto a new shock. It’s a true bolt-off, bolt-on job.
- Best For: Restoring the factory ride quality with minimal fuss.
- Vibe: OEM, comfortable, reliable daily driver.
- Cost: $$
Popular Brands: FCS, TRQ, and iD Select are popular aftermarket brands offering affordable quick-strut assemblies . The TRQ 8-piece kit, for example, includes front strut assemblies and rear shocks, making it a complete package . For those wanting a high-quality OE replacement, KYB is the #1 recommended OE replacement, as they manufacture on the same lines as original equipment .
Option 2: Performance Shocks and Springs
If you want a sportier feel without the full commitment of coilovers, a shock and spring combo is a fantastic upgrade. You’ll pair a set of performance lowering springs with a set of high-performance shocks.
- Best For: The weekend enthusiast who wants a lower, sharper ride.
- Vibe: Sporty, improved handling, aggressive stance.
- Cost: $$$
Option 3: Coilovers
For the true enthusiast who wants complete control over their car’s handling and stance, coilovers are the answer. A coilover system integrates the spring and shock into a single unit with adjustable ride height and often adjustable damping .
Modern G37 coilovers, like those from Function and Form, are light-years ahead of the cheap, rock-hard options of the past. They offer a balanced ride that can be comfortable for daily driving yet firm and responsive for spirited backroad runs . For example, the Function and Form Type 4 coilovers are designed with a long-stroke, inverted monotube design that increases suspension travel for better ride quality while providing sharp control in corners . The Type 4 system for the G37 IPL even offers 24 or 32 levels of damping adjustment, allowing you to fine-tune the ride from soft to track-firm with a simple turn of a dial .
- Best For: The track-day enthusiast, drifter, or stance aficionado.
- Vibe: Highly adjustable, performance-oriented, customizable.
- Cost: $$$$
Essential Refresh Components
Depending on the state of your suspension, you’ll want to consider replacing some or all of these components. “While you’re in there” is the mantra for any suspension refresh.
| Component | What It Does | When to Replace | Cost (Guide) |
|---|---|---|---|
| Shocks & Struts | Dampen spring oscillations for a controlled ride. | Every 50,000-75,000 miles or when ride becomes bouncy . | $100 – $500+ each |
| Coil Springs | Support the vehicle’s weight and absorb impacts. | If broken, sagging, or when upgrading ride height. | $50 – $200+ each |
| Control Arms | Connect the wheel hub to the chassis. | If bushings are cracked/torn or ball joints are worn . | $100 – $300+ each |
| Sway Bar Links | Connect the sway bar to the control arm. | If clunking noises are heard over bumps. | $20 – $60 each |
| Bushings | Isolate vibrations and allow for controlled movement. | If cracked, dried out, or causing imprecise handling. | Varies widely |
Installation: DIY or Pro?
DIY Installation
A suspension refresh is a major undertaking, but a dedicated home mechanic with the right tools can absolutely do it.
- Pros: You save on labor costs, which can be substantial. You also get the satisfaction of doing the work yourself.
- Cons: It’s physically demanding and time-consuming. You will need a spring compressor if you’re not using a quick-strut assembly. You’ll also need a good set of jack stands, a floor jack, and a full socket set. A torque wrench is non-negotiable to ensure everything is tightened to spec. A suspension lubrication service can be a simpler DIY entry point .
Professional Installation
If you’re not comfortable working with heavy, spring-loaded components or don’t have the space, leave it to the professionals.
- Pros: The job is done right, with the right tools and expertise. A professional shop will also perform a proper wheel alignment after the work, which is critical.
- Cons: It’s significantly more expensive. You’re paying for their time, expertise, and overhead.
Frequently Asked Questions (FAQ)
What is a quick strut assembly?
It’s a complete, pre-assembled unit containing the shock absorber, coil spring, upper mount, and bearing plate. It’s designed for a simpler, faster installation without needing a spring compressor .
How often should I replace my G37’s struts?
While there’s no set mileage, they typically need replacement around 50,000 to 75,000 miles. If your ride feels bouncy or your car dives under braking, it’s time to inspect them.
What’s better for a daily driver: quick struts or coilovers?
For a pure daily driver looking to restore the factory ride, quick struts are the best choice for their simplicity and cost-effectiveness. Coilovers are better suited for those who want a sportier feel, lowered ride height, and tunable damping .
How much does it cost to refresh my G37’s suspension?
Costs vary wildly depending on the parts you choose. A quick-strut kit can be found for a few hundred dollars, while a full set of high-end coilovers can cost over $2,000 .
The Verdict
Your G37’s suspension is the foundation of its driving character. Restoring it with a refresh is one of the most impactful upgrades you can perform. It brings back the sharp handling, comfortable ride, and confidence that makes this chassis so special. Choose the path that fits your budget and driving style—whether it’s an OE-level quick-strut swap or a full-on coilover transformation—and get ready to fall in love with your car all over again.
Have you done a suspension refresh on your G37? What setup did you go with? Share your thoughts in the comments below!
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