2007-2013 Infiniti EX 37 3.7i V6 (320 Hp) 4WD Automatic

The Infiniti EX37, produced between 2007 and 2013, represented Infiniti’s entry into the burgeoning luxury crossover segment. Positioned as a more sporting alternative to larger, more comfort-oriented SUVs, the EX37 aimed to deliver a blend of performance, style, and technology. This particular variant, the 3.7i V6 with 320 horsepower and a seven-speed automatic transmission coupled with all-wheel drive, was the primary configuration offered throughout its production run, serving as the flagship trim level. It was built on the Nissan FM platform, shared with the Nissan 370Z and other Infiniti models, emphasizing a rear-wheel-drive biased platform even with the availability of all-wheel drive.

Technical Specifications

Powertrain & Engine Architecture

The heart of the EX37 is the VQ37VHR 3.7-liter V6 engine. This engine, a member of Nissan’s highly regarded VQ family, is a naturally aspirated, 24-valve DOHC powerplant. The “VHR” designation stands for “Variable Valve Timing and lift with reduced friction.” This technology allows for optimized airflow and combustion efficiency across a wide range of engine speeds. The engine utilizes a multi-port fuel injection system and boasts a compression ratio of 11:1. The seven-speed automatic transmission, sourced from Jatco (a Nissan subsidiary), features adaptive shift control, attempting to learn the driver’s habits and adjust shift points accordingly. The transmission also includes manual shift mode, allowing for some driver control. The all-wheel-drive system is primarily rear-biased, sending most of the power to the rear wheels under normal driving conditions and automatically shifting power to the front wheels when traction is lost.

Driving Characteristics

The EX37 3.7i Automatic delivers brisk acceleration, with a 0-60 mph time typically around 6.2 seconds. The seven-speed automatic transmission provides smooth and relatively quick shifts, although it can sometimes feel hesitant during aggressive driving. Compared to a manual transmission equipped EX37 (which was not widely available in the US market), the automatic sacrifices some responsiveness. The rear-wheel-drive bias contributes to a more engaging driving experience than many other crossovers, offering a balanced feel in corners. The suspension is tuned for comfort, but it still manages to provide decent body control. The steering is precise and well-weighted, enhancing the overall driving experience. The gear ratios are optimized for both acceleration and highway cruising, providing ample power for merging and overtaking.

Equipment & Trim Levels

The EX37 came well-equipped even in its base form. Standard features typically included leather upholstery, power-adjustable front seats, a Bose premium sound system, a navigation system, a rearview camera, and automatic climate control. Optional extras included a panoramic sunroof, adaptive cruise control, lane departure warning, and a blind-spot monitoring system. Interior trim levels varied, with options for wood or aluminum accents. The EX37 Journey package added features like heated front seats, a power liftgate, and rain-sensing wipers. The Limited package offered even more luxury, including semi-aniline leather upholstery and a unique interior trim.

Chassis & Braking

The EX37 utilizes a fully independent suspension system, with a multi-link setup at all four corners. This provides a comfortable ride and good handling characteristics. The front suspension incorporates stabilizer bars to reduce body roll. The braking system consists of ventilated discs on all four wheels, providing ample stopping power. The ABS (Anti-lock Braking System) and Electronic Brake-force Distribution (EBD) are standard features, enhancing safety and stability. The chassis is relatively stiff, contributing to the vehicle’s overall rigidity and handling precision.

Market Reception & Comparison

Critics generally praised the EX37 for its sporty handling, powerful engine, and luxurious interior. However, some noted that the fuel economy was not particularly impressive for its class. Compared to competitors like the BMW X3 and Audi Q5, the EX37 offered a more aggressive driving experience and a more distinctive styling. The 1.8L and diesel variants available in European markets were not offered in the US. The EX37’s reliability was generally considered good, although some owners reported minor issues with the infotainment system and the automatic transmission. Fuel economy averaged around 17 mpg city and 24 mpg highway, which was typical for a V6-powered crossover of its size.

Legacy

The Infiniti EX37, while discontinued in 2013, remains a popular choice in the used car market. The VQ37VHR engine is known for its durability and relatively low maintenance costs. The seven-speed automatic transmission, while not without its quirks, has proven to be generally reliable. The EX37’s sporty handling and luxurious features continue to appeal to buyers looking for a crossover that offers a more engaging driving experience. Parts availability is generally good, and the vehicle’s relatively simple design makes it relatively easy to maintain. The EX37 paved the way for the QX30, Infiniti’s more recent entry into the compact luxury crossover segment, building on the foundation of sporty driving dynamics and upscale features.