INFINITI G37 Parts Guide — VQ37VHR Engine, Body Styles and Maintenance

The INFINITI G37 is one of the great driver's cars of the modern era — a sports sedan and coupe that earned its reputation through a combination of the outstanding 3.7L VQ37VHR engine, rear-wheel drive balance, and sharp chassis dynamics that competitors in its class could not match. The VQ37VHR's combination of high-revving performance and long-term durability has made the G37 a favorite among enthusiasts who maintain them well past 150,000 miles. INFINITI of Akron stocks genuine OEM G37 parts for all body styles and model years 2008 through 2013 with nationwide shipping.

G37 Body Style Guide — Three Distinct Configurations

The G37 was produced in three body styles that share the VQ37VHR engine and V36 platform but use different exterior body components throughout. This is the most common source of fitment errors on G37 parts orders.

G37 Coupe (V36 Chassis, 2008–2013)

The two-door G37 coupe uses unique exterior body panels including the hood, front fenders, doors, rear quarter panels, rear bumper cover, and trunk lid. The coupe's shorter wheelbase and lower roofline distinguish it visually and mechanically from the sedan. Trim levels include Journey (base) and Sport, with Sport adding the Brembo front brake package and upgraded suspension. The coupe is the most popular G37 body style among enthusiasts.

G37 Sedan (V36 Chassis, 2009–2013)

The four-door G37 sedan shares the V36 platform with the coupe but uses completely different exterior body panels. No body components interchange between coupe and sedan despite sharing the chassis. The sedan was available in base, Journey, X AWD, and Sport trim levels. The Sport sedan uses Brembo front brakes and upgraded suspension identical in specification to the Sport coupe, with the same specific OEM part numbers.

G37 Convertible (CV36 Chassis, 2009–2013)

The two-door G37 convertible uses a retractable hardtop system with unique rear quarter panels, trunk structure, and top mechanism. The convertible body is significantly reinforced compared to the coupe for open-top structural rigidity, making the chassis structure unique to this body style. The retractable hardtop mechanism, top motors, hydraulic lines, and associated components are convertible-exclusive. Mechanical components including the VQ37VHR engine and suspension are shared with the coupe.

The Key Interchange Rule

Mechanical components — VQ37VHR engine and all its associated components, front and rear suspension geometry and components, drivetrain, and braking system architecture — are consistent across all three body styles. Body panels, glass, interior, and convertible-specific structural components are body-style exclusive. When ordering, specify your body style for any exterior, interior, or structural component. Engine, suspension, and brake parts can typically be ordered by year and trim without specifying body style.

The VQ37VHR Engine — Everything You Need to Know

The VQ37VHR is a 3.7L naturally aspirated V6 producing 328 horsepower in the G37. It uses Variable Valve Event and Lift technology to vary both valve timing and lift continuously — a system requiring precise sensor feedback. The engine is designed for sustained high-rpm operation with a 7,500 rpm redline that puts meaningful thermal stress on components compared to lower-revving engines of similar displacement.

Four Catalytic Converters

This is the most important G37 exhaust fact: the VQ37VHR uses four catalytic converters in a two-bank arrangement. Many owners and even some shops are surprised to discover this. The system works as follows:

• Pre-catalytic converter, bank 1 — Small converter positioned close to the right side exhaust manifold to reach operating temperature quickly after cold start.
• Pre-catalytic converter, bank 2 — Identical function on the left side cylinder bank.
• Main catalytic converter, bank 1 — Larger downstream converter handling primary emissions reduction for bank 1.
• Main catalytic converter, bank 2 — Larger downstream converter for bank 2.

All four converters carry different OEM part numbers and are not interchangeable with each other. A P0420 code (bank 1 efficiency) and a P0430 code (bank 2 efficiency) indicate different converters failing — having both codes simultaneously means two converters need replacement. Confirm with your shop exactly which position or positions have failed before ordering.

High-Rev Maintenance Requirements

The VQ37VHR rewards proper maintenance and OEM parts more than most engines because its high-rev operating range creates greater stress on key components:

• Spark plugs — Must be OEM iridium plugs with the correct heat range specification. Higher combustion temperatures at high rpm make heat range critical. Non-OEM plugs cause misfires at high rpm that do not appear at idle.
• Oxygen sensors — Must accurately measure exhaust chemistry across the full rpm range from idle to redline. OEM sensors maintain calibration at both low and high-rpm operation.
• Mass air flow sensor — The VQ37VHR's VVEL system adjusts valve lift based on MAF sensor data. Aftermarket MAF sensors with different calibration curves affect VVEL function and fuel delivery across the rpm range.
• Engine oil — The VQ37VHR requires 5W-30 full synthetic with regular changes. High-rpm operation accelerates oil degradation more quickly than lower-revving engines.

Sport Package Guide — Brembo Brakes and Suspension

G37 Sport Package models are among the most satisfying configurations to own and maintain correctly, but they require Sport-specific parts for brake and suspension service:

Brembo Front Brake System

Sport Package G37 coupe and sedan models use Brembo four-piston front calipers with larger diameter front rotors. This system uses completely different OEM pad and rotor part numbers from the standard single-piston front brakes. Installing standard G37 brake pads in Brembo calipers results in the pads not fitting correctly in the caliper bridge — a safety issue. Always confirm Brembo or standard brake equipment before ordering any front brake component. You can identify Brembo calipers by the Brembo logo cast into the caliper body, visible through the wheel spokes.

Sport Suspension

Sport Package suspension uses front strut assemblies and rear shock absorbers with different spring rates and damper valving from base trim components. These components carry different OEM part numbers. Installing base suspension components on a Sport G37 produces noticeably softer handling that changes the character of the car significantly. Confirm your trim when ordering struts or shock absorbers.

OEM G37 Parts Availability

Despite the G37 ending production in 2013, Nissan actively maintains the OEM parts catalog for this model. The G37's strong enthusiast ownership base and the VQ37VHR engine's use across multiple platforms mean demand for G37 parts remains consistent. Common wear items, engine components, suspension parts, and brake components are in regular stock. Some lower-volume body panels and trim pieces for the convertible body style may require 3–7 business days from the distribution center. INFINITI of Akron maintains the most commonly ordered G37 parts in stock for fast shipping.

Shop All G37 Parts

Browse the complete genuine OEM INFINITI G37 parts catalog: INFINITI G37 OEM Parts — Coupe, Sedan and Convertible. Specify your body style, model year, and trim at checkout for confirmed fitment.

Frequently Asked Questions