Infiniti G37 | History, Reliability & Buying Guide

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Infiniti G37: A Comprehensive Buyer's Guide

The Infiniti G37, a successor to the popular G35, solidified Infiniti's position as a major player in the luxury sport sedan/coupe market. Introduced in 2008, it offered a compelling blend of performance, style, and technology. It competes with rivals like the BMW 3 Series, Mercedes-Benz C-Class, and Lexus IS. This guide provides a detailed overview to help you make an informed purchase.

Generations and Model Years

Second Generation (V36 Chassis): 2007-2013 (G37: 2008-2013)

2007 (G35 Sedan): Although technically a G35, the 2007 model introduced a revised VQ35HR engine, setting the stage for the G37. Key upgrades included increased horsepower and a higher redline.

2008 (G37 Coupe): Introduction of the G37 Coupe with the new 3.7-liter VQ37VHR engine. More aggressive styling and improved performance compared to the G35 Coupe.

2009 (G37 Sedan): The 3.7-liter VQ37VHR engine made its way to the G37 Sedan. Minor interior and exterior styling updates.

2010: Minor equipment changes. Introduction of the G37 Convertible.

2011: Revised exterior styling, including a new front fascia and grille. Minor interior upgrades.

2012: Minimal changes from the 2011 model.

2013: Final year of the G37. Limited changes from the previous year. This year also saw the introduction of the Q50, the G37's successor, though the G37 was still sold concurrently.

Reliability and Common Issues

The G37 is generally considered a reliable vehicle, particularly compared to some of its European competitors. However, like any car, it has its share of potential problems. Careful inspection and a thorough pre-purchase inspection are crucial.

VQ37VHR Engine Concerns:

Oil Consumption: The VQ37VHR engine is known to exhibit oil consumption issues, especially in earlier model years (2008-2010). Regular monitoring of oil levels and using the correct oil viscosity (5W-30 is typically recommended) is essential. Some owners have reported needing to add oil between changes. This can be a major issue if neglected, leading to premature engine wear.

Timing Chain Tensioner: A less common, but potentially serious issue, is related to the timing chain tensioner. A failing tensioner can cause timing chain rattle, especially on cold starts. Ignoring this can lead to significant engine damage. Listen for any unusual noises from the engine bay, particularly a rattling sound that disappears once the engine warms up.

Gallery Gasket Leakage: The gallery gaskets, which seal the oil galleys in the engine block, can sometimes leak. This can lead to a loss of oil pressure and potentially engine damage if left unattended. This is a more involved repair.

Transmission Issues:

Automatic Transmission Slipping/Rough Shifting: While generally reliable, the automatic transmission (particularly the 5-speed in earlier models) can experience slipping or rough shifting, especially in higher-mileage examples. Regular transmission fluid changes are critical to prevent issues. Consider a transmission flush and filter change as part of preventative maintenance.

Manual Transmission Grinding: For models equipped with a manual transmission, listen for grinding noises during shifts, particularly into second or third gear. This could indicate worn synchronizers.

Other Common Issues:

Wheel Bearings: Wheel bearing failure is a relatively common issue, especially on vehicles driven in areas with harsh road conditions. Listen for a humming or grinding noise that changes with vehicle speed.

Brake Rotors: The G37's brakes are powerful but can be prone to rotor warping, especially with aggressive driving. Inspect the rotors for signs of warping (pulsating brake pedal) and consider upgrading to aftermarket rotors and pads for improved performance and longevity.

Interior Trim and Electronics: Check for wear and tear on the interior trim, particularly the leather seats and dashboard. The navigation system (if equipped) can sometimes experience issues. Test all electronic features to ensure they are functioning correctly. The navigation system is outdated by modern standards.

Power Window Motors: Power window motors can sometimes fail.

Rust (in specific regions): Depending on the climate where the car was originally driven, rust can be a concern, particularly in areas with heavy salt use during winter. Inspect the undercarriage, wheel wells, and door panels for signs of rust.

Driving Experience

The Infiniti G37 offers a sporty and engaging driving experience, thanks to its powerful V6 engine, responsive handling, and well-weighted steering. The G37 is known for its raw, connected feel to the road.

Pros:

Powerful VQ37VHR Engine: Provides excellent acceleration and a thrilling exhaust note.

Sporty Handling: Well-balanced chassis and responsive steering make it fun to drive on twisty roads.

Attractive Styling: The G37 boasts a sleek and aggressive design that still looks good today.

Available Manual Transmission: Appeals to driving enthusiasts who prefer a more engaging driving experience.

Luxurious Interior: The interior is well-appointed with comfortable seats and quality materials (although some trim pieces can be prone to wear).

Cons:

Fuel Economy: Fuel economy is not the G37's strong point, particularly with the VQ37VHR engine. Expect lower MPG compared to some of its competitors.

Ride Quality: The ride can be firm, especially on models with the sport suspension package. This can be a tradeoff for the improved handling.

Road Noise: Road noise can be noticeable, particularly on the highway.

Outdated Technology: The infotainment system and technology features are dated compared to newer vehicles.

Potential for Oil Consumption: As mentioned above, this is a potential concern with the VQ37VHR engine.

Buying Advice

Years to Consider:

2011-2013: These years offer improved styling, minor interior upgrades, and potentially fewer issues with oil consumption compared to earlier models.

Manual Transmission Models: If you enjoy driving, a manual transmission G37 offers a more engaging and rewarding experience. These models tend to hold their value better.

Sport Models: Models with the sport package typically feature upgraded brakes, suspension, and styling elements.

Years to Potentially Avoid (or Inspect Carefully):

2008-2010: These model years may be more prone to oil consumption issues. A thorough inspection is crucial.

High Mileage Examples: Pay close attention to the maintenance history of high-mileage G37s. Regular maintenance is essential for longevity.

Pre-Purchase Inspection Checklist:

Oil Consumption: Check the oil level and look for any signs of oil leaks. Ask the seller about oil consumption habits. A compression test can also provide valuable information.

Timing Chain Noise: Listen for any unusual noises from the engine bay, particularly a rattling sound that disappears once the engine warms up.

Transmission Performance: Test the transmission thoroughly for smooth shifting and no slipping.

Brake Condition: Inspect the brake rotors for warping and the brake pads for wear.

Wheel Bearings: Listen for a humming or grinding noise that changes with vehicle speed.

Rust: Inspect the undercarriage, wheel wells, and door panels for signs of rust.

Electronics: Test all electronic features to ensure they are functioning correctly.

Maintenance Records: Review the maintenance records to ensure that the vehicle has been properly maintained.

Professional Inspection: Consider having a qualified mechanic perform a pre-purchase inspection to identify any potential problems.

By following these guidelines, you can increase your chances of finding a well-maintained and reliable Infiniti G37 that will provide years of driving enjoyment.
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