How Long Do Infiniti G37 Last

So, you're wondering about the lifespan of your Infiniti G37. It's a valid concern, especially as your car ages. The G37 is known for its sporty handling, powerful engine, and overall luxurious feel, but like any vehicle, it has its quirks and potential maintenance needs as it racks up the miles. Let's dive into what you can expect from your G37 and how to keep it running strong for years to come.

The Lifespan of a G37: Expectations vs. Reality

Generally, a well-maintained Infiniti G37 can easily last 200,000 miles or more. I've personally seen them go well past that. However, the lifespan isn't just about miles; it's about how those miles were accumulated and how well the car was treated along the way. A G37 that spent its life doing hard pulls and aggressive driving will likely require more repairs and maintenance sooner than one that was driven responsibly.

Think of it this way: Mileage is just a number. The condition of the engine, transmission, suspension, and other critical components is what truly dictates how much life is left. A G37 with 150,000 miles and meticulous maintenance records might be a better buy than one with 100,000 miles and a history of neglect.

Common Issues and Solutions: Keeping Your G37 Alive

Alright, let's get down to the nitty-gritty. Here are some common issues you might encounter as your G37 ages, along with potential solutions:

1. Oil Consumption

This is probably the most discussed issue among G37 owners, particularly those with the VQ37VHR engine. Oil consumption can increase with mileage, and in some cases, it can become significant.

Possible Causes:

• Worn piston rings: This is a common culprit, especially in higher-mileage engines.
• Valve stem seals: Over time, these seals can dry out and crack, allowing oil to leak into the combustion chamber.
• PCV valve: A malfunctioning PCV valve can create excessive crankcase pressure, leading to oil being forced past seals.

Solutions:

• Regular oil changes: Use a high-quality synthetic oil and stick to the recommended service intervals (or even shorten them slightly).
• Check PCV valve: A simple replacement can sometimes make a difference. You can usually do this yourself with basic tools. The PCV valve is typically located on the valve cover.
• Consider a thicker oil: Switching to a slightly thicker oil (e.g., from 5W-30 to 10W-30) can sometimes help reduce oil consumption, especially in older engines.
• Engine rebuild: In severe cases of oil consumption due to worn piston rings, an engine rebuild might be necessary. This is a significant expense, ranging from $3,000 to $6,000 depending on the extent of the work.

2. Timing Chain Tensioners

The VQ37VHR engine uses timing chains, which are generally very durable. However, the timing chain tensioners can sometimes fail, leading to a rattling noise, especially on startup.

Possible Cause:

• Worn timing chain tensioners: The tensioners rely on oil pressure to maintain proper chain tension. Over time, they can wear out and lose their ability to keep the chain tight.

Solutions:

• Replace timing chain tensioners: This is a more involved repair that requires removing the front cover of the engine. It's best left to a qualified mechanic. The cost can range from $800 to $1500, including parts and labor.
• Listen for the noise: A slight rattle on cold start is common, but a persistent or loud rattling noise warrants immediate attention.

3. Gallery Gaskets

The G37's engine uses gallery gaskets to seal oil passages within the engine. These gaskets can fail over time, leading to a loss of oil pressure.

Possible Cause:

• Deteriorated gallery gaskets: The original gaskets were made of paper and are prone to failure due to heat and age.

Solutions:

• Replace gallery gaskets: The updated metal gaskets are a much better long-term solution. This is a labor-intensive job that requires significant disassembly of the engine. The cost is typically in the $1,500 to $3,000 range.
• Monitor oil pressure: Keep an eye on your oil pressure gauge. If you notice a sudden drop in oil pressure, pull over immediately and have the car towed to a mechanic.

4. Suspension Components

As your G37 ages, the suspension components will inevitably wear out.

Possible Causes:

• Worn bushings: Rubber bushings in the control arms, sway bars, and other suspension components can dry out and crack, leading to sloppy handling and noise.
• Worn shocks and struts: These components lose their damping ability over time, resulting in a bouncy ride and reduced handling performance.
• Ball joint failure: Ball joints are critical for steering and suspension movement. Worn ball joints can cause play in the steering and a clunking noise.

Solutions:

• Replace worn bushings: You can replace individual bushings or replace the entire control arm. Replacing the entire control arm is often easier and faster. Prices vary depending on the component, but expect to pay around $100-$300 per control arm plus labor.
• Replace shocks and struts: Replacing the shocks and struts will restore the car's original ride quality and handling. A complete set of shocks and struts can cost around $400-$800, plus labor.
• Replace ball joints: Worn ball joints are a safety concern and should be replaced immediately. Ball joint replacement can cost around $200-$400 per ball joint, including labor.
• Regular inspections: Have your suspension inspected regularly by a qualified mechanic.

5. Electrical Issues

Like many modern cars, the G37 has a complex electrical system. Electrical issues can sometimes arise, especially as the car ages.

Possible Causes:

• Wiring harness damage: Rodents, heat, and vibration can damage wiring harnesses, leading to shorts and other electrical problems.
• Sensor failures: Sensors throughout the car monitor various parameters, and they can fail over time.
• Battery issues: A weak or failing battery can cause a variety of electrical problems.

Solutions:

• Inspect wiring harnesses: Look for signs of damage, such as frayed wires or rodent chewing.
• Scan for diagnostic trouble codes (DTCs): Use an OBD-II scanner to check for any stored DTCs. This can help pinpoint the source of the problem.
• Replace faulty sensors: Replace any sensors that are known to be faulty.
• Test and replace the battery: Have the battery tested to ensure it's in good condition. Replace the battery if it's weak or failing.

Extending the Life of Your G37: Proactive Maintenance is Key

The best way to ensure your G37 lasts a long time is to be proactive with maintenance. Here are some tips:

• Follow the manufacturer's recommended service intervals: Pay attention to the maintenance schedule in your owner's manual.
• Use high-quality fluids and parts: Don't skimp on maintenance items like oil, filters, and brake pads.
• Address minor issues promptly: Don't let small problems turn into big ones.
• Keep the car clean: Regular washing and waxing will help protect the paint and prevent rust.
• Drive responsibly: Avoid excessive speeding, hard braking, and other abusive driving habits.

Tools You Might Need

If you're planning on tackling some of the maintenance tasks yourself, here are some essential tools you'll need:

• OBD-II scanner: To read and clear diagnostic trouble codes.
• Socket set: A comprehensive socket set with metric sizes.
• Wrench set: A set of open-end and box-end wrenches.
• Torque wrench: To tighten fasteners to the correct torque specifications.
• Jack and jack stands: To safely lift the car.
• Pliers: Various types of pliers, including needle-nose and adjustable pliers.
• Screwdrivers: A set of Phillips and flat-head screwdrivers.

Final Thoughts

The Infiniti G37 is a well-built and reliable car that can last a long time with proper care. By addressing common issues promptly and following a proactive maintenance schedule, you can enjoy your G37 for many years and many more miles. Don't be afraid to seek out advice from other G37 owners or consult with a trusted mechanic. With a little bit of effort, you can keep your G37 running like new.