The 2018 Infiniti Q50 is a compact luxury sport sedan that blends strong turbocharged performance with a comfortable, tech-forward cabin. It’s a great fit for drivers who want a premium badge and quick acceleration without moving up to a larger, pricier luxury sedan. For 2018, the Q50 sits in the middle of its first-generation run (introduced for 2014) and benefits from the updated powertrain lineup that replaced the older 3.7L V6 with modern twin-turbo V6 options. In the market, it competes with sedans like the BMW 3 Series and Audi A4 by offering high horsepower for the money and available all-wheel drive.

- Twin-turbo V6 power: Most 2018 Q50 trims use a 3.0L twin-turbo V6, offered in 300 hp form (3.0t) and a higher-output 400 hp version on the Red Sport 400. This gives the Q50 standout straight-line performance in its class. - Available intelligent all-wheel drive: Rear-wheel drive is standard, with AWD available on many trims, making it appealing for drivers in snow-belt states who still want a sporty feel. - 7-speed automatic transmission: A 7-speed automatic is standard, tuned for quick acceleration and relaxed cruising. - Driver-assist and safety tech: Available features include forward emergency braking, blind spot intervention, and intelligent cruise control depending on trim and packages. - Infiniti InTouch dual-screen layout: The Q50 uses a dual display (upper and lower screens) for navigation, settings, and infotainment, with a premium audio option available on many models.

Shoppers researching 2018 Infiniti Q50 reliability often find it’s a strong value, but not without quirks. Here are 2018 Infiniti Q50 problems and 2018 Infiniti Q50 common issues that owners most frequently mention: - Turbo and boost-control concerns (3.0L twin-turbo models): Some owners report loss of power, underboost/overboost warnings, or turbo-related issues that can show up anywhere from roughly 30,000 to 80,000 miles. Not every car is affected, but consistent oil changes and avoiding extended oil intervals help reduce risk on turbocharged engines. - Serpentine belt and accessory belt wear/noise: A number of Q50 owners report squealing, chirping, or premature belt wear, sometimes in the 20,000–50,000 mile range depending on climate and driving. If ignored, a worn belt can lead to charging or cooling issues. - Infotainment glitches and dual-screen slowdowns: The InTouch system is a frequent complaint area, including lag, freezing, Bluetooth hiccups, and occasional reboots. These issues are usually annoying rather than disabling, but they can impact daily usability. - Steering feel/Direct Adaptive Steering complaints (if equipped): Some Q50s with Infiniti’s steer-by-wire system have owner feedback about numb steering feel or inconsistent feedback. It’s not always a “failure,” but it’s a common point of discussion during test drives, and software updates or calibration checks may be needed.