The 2018 Infiniti Q50 Review: The Sweet Spot for Modern Sport Sedan Value
There’s a moment on a winding road when the 2018 Q50 feels absolutely perfect—the twin-turbo V6 pulls eagerly toward the redline, the chassis grips with confidence, and you realize this Japanese luxury sedan delivers 90% of the driving thrill at roughly 60% of the price of its German rivals.
The 2018 Infiniti Q50 represents something rare in the automotive world: a meaningful refresh that actually improved the car without screwing up what made it special. This was the year Infiniti listened to feedback, refined the controversial bits, and created a sport sedan that hits a genuine sweet spot for value-conscious buyers who still want legitimate performance and luxury credentials. If you’re shopping the used market for a premium sedan that won’t empty your wallet, the 2018 Q50 deserves a serious look.
TL;DR
The 2018 Infiniti Q50 took everything interesting about the original and made it better. The exterior got sharper, the interior gained nicer materials, and the steering wheel-mounted paddle shifters finally made sense . But the real story is under the hood. The 3.0-liter twin-turbo V6—available in either 300 or 400 horsepower tunes—is an absolute gem that landed on the Ward’s 10 Best Engines list . The base 2.0-liter turbo four is adequate for commuters, but the Red Sport 400 is the one enthusiasts crave. Yes, the dual-screen INFINITI InTouch™ system still feels dated, and the trunk space is merely okay . But here’s the thing: you can buy a low-mileage 2018 Q50 Red Sport 400 for thousands less than a comparable BMW 340i or Audi S4, and that’s a compelling argument.
Key Takeaways
- Engine Options Matter: The 3.0-liter twin-turbo V6 (VR30) is the star—smooth, powerful, and responsive. The 400-horsepower version in the RED SPORT 400 transforms the car completely .
- The Refresh Worked: New front and rear fascias, updated LED lighting, and interior stitching gave the Q50 a welcome shot of visual energy .
- ProPILOT Assist™ Arrives: 2018 introduced a bundled driver-assistance suite that includes Intelligent Cruise Control, Active Lane Control, and Forward Emergency Braking—genuinely useful tech for road trips .
- Infotainment Remains Flawed: The dual-screen setup still lacks Wireless Apple CarPlay® and Android Auto™, and the graphics feel last-generation . Budget accordingly if you’re particular about connectivity.
- Steering Feel Is… Complicated: The available Direct Adaptive Steering (steer-by-wire) remains polarizing. Many owners prefer the standard electric power steering for its more natural feel .
- Reliability Looks Solid: J.D. Power gives the 2018 Q50 an “Average” quality and reliability rating, with owners particularly praising acceleration and ease of entry . However, some high-mileage examples have reported engine issues, so service history is critical .
- Cargo Space Is Mediocre: With only 9–14 cubic feet of trunk space depending on configuration, packing for a family road trip requires strategy .
Understanding the 2018 Infiniti Q50: Performance Meets Practicality
The 2018 model year marked a turning point for the Q50. Infiniti’s best-selling vehicle got a meaningful update that touched the exterior, interior, and technology packages . Let’s dig into what makes this year so special.
The Heart of the Beast: Powertrain Choices
This is where the 2018 Q50 genuinely shines. Infiniti offered four distinct powertrain options, but the headline act is undoubtedly the VR-series 3.0-liter V6 twin-turbo .
- 2.0-liter Turbo Four: Produces 208 horsepower and 258 lb-ft of torque . It’s perfectly adequate for daily commuting and returns decent fuel economy, but enthusiasts will want more. One owner noted it has “adequate horsepower for running on the highway and passing but gets me great gas mileage on my trips” .
- 3.0-liter Twin-Turbo V6 (300 hp): This is the sweet spot for most buyers. With 300 horsepower and 295 lb-ft of torque, it provides genuine thrills without the Red Sport’s price premium .
- RED SPORT 400: The one enthusiasts crave. A remarkable 400 horsepower and 350 lb-ft of torque from the same 3.0-liter block . It’s genuinely quick and transforms the Q50 into a legitimate sports sedan contender.
- Hybrid: Combines a 3.5-liter V6 with an electric motor for 360 net horsepower . It’s quick and efficient but adds complexity and eats into trunk space.
All engines pair with a 7-speed automatic transmission. For 2018, Infiniti finally moved the optional magnesium paddle shifters from the steering column to the steering wheel itself—a small change that makes manual mode vastly more enjoyable .
Driving Experience: Comfort or Sport?
Here’s the thing about the Q50—it’s genuinely talented, but it doesn’t shout about it. The standard Rack Electronic Power Steering provides linear, predictable feel . The optional Direct Adaptive Steering remains controversial; some love the customization, others find it numb .
The Dynamic Digital Suspension (standard on Red Sport 400, optional on Sport) lets you adjust shock absorber firmness via the Drive Mode Selector . In Sport+ mode, the car tightens up noticeably, delivering flat cornering and responsive handling. In Standard mode, it settles into a comfortable cruiser.
“Keep it pointed straight and the steering wheel tracks well, the ride is comfortable on smooth pavement, and the seven-speed automatic executes nearly seamless upshifts,” noted Car and Driver. “Get a little frisky, though, and you’ll notice that the steering is imprecise and uncommunicative and that the ride is jittery over uneven pavement” .
Translation: The Q50 is a fantastic grand tourer that can hustle when asked, but it’s not quite as sharp as a BMW 3 Series at its absolute limit.
Living with the Cabin: Refined but Familiar
The 2018 interior updates brought nicer materials and more differentiation between trims. The instrument panel gained faux leather with double stitching, and new wood trim appeared on the dashboard . Heated and Ventilated Leather Seats are available on higher trims, and the Bose® Performance Series Audio System (with 16 speakers in top trims) transforms the cabin into a concert hall .
The RED SPORT 400 gets unique red stitching, quilted seat inserts, and aluminum trim instead of wood—a nice touch that makes it feel special .
But let’s be honest about the tech. The dual-screen INFINITI InTouch™ setup remains the car’s weakest link. The graphics are dated, the interface can be frustrating, and there’s no Wireless Apple CarPlay® and Android Auto™ . The upper screen (8.0 inches) displays navigation and isn’t touch-sensitive—it’s controlled by a finicky joystick. The lower screen (7.0 inches) handles audio, climate, and apps via touch . It works, but it’s not competitive with modern systems.
“The Q50 is ostensibly a luxury model, but it never feels truly luxurious, although higher trims add more comfort features.” — Car and Driver
Timeline: The Evolution of the Q50
The 2018 model represents the mature phase of the Q50’s development. Here’s the quick history:
- 2014: First-generation Q50 debuts, replacing the G37. Introduces Direct Adaptive Steering and dual-screen INFINITI InTouch™.
- 2016: VR-series 3.0-liter twin-turbo V6 arrives, replacing the aging VQ37VHR. Red Sport 400 joins the lineup.
- 2018: Significant refresh—new front/rear fascias, updated LED lighting, interior stitching upgrades, steering wheel-mounted paddle shifters, and ProPILOT Assist™ technology bundle .
- 2020+: Minor updates continue, but the fundamental platform remains, with increasing emphasis on safety tech and connectivity upgrades in later years.
Real-World Impact: Common Issues and Ownership Tips
The 2018 Q50 has proven reasonably reliable, but no used car is perfect. Here’s what owners and experts report.
The Infotainment Achilles’ Heel (Still)
Remember how the 2014 model had glitchy infotainment? The 2018 version improved stability, but it’s not flawless. One owner reported, “The car is great everything about it but the entertainment system is garbage. It’s costing me over 3 grand to replace it. It just stop working. And from doing my research the company knows that this a PROBLEM” .
This is a recurring theme. The INFINITI InTouch™ system can fail, and replacement costs are substantial. If you’re shopping a used 2018 Q50, verify that all screens function properly and that the system responds reasonably quickly.
Engine Concerns: Mostly Good, But Watch for Issues
The VR-series engine is generally robust, but there are cautionary tales. One Canadian owner reported a catastrophic failure at just 18,000 miles: “2 cylinders are not functioning/misfiring. On inspection at the Infiniti dealership they found broken ‘bearing material in the lower oil pan.’ The warranty has just expired and they gave a quote of about CA$28,000 to replace the engine” .
Another owner experienced timing chain failure at 107,000 miles . These appear to be outliers rather than common failures, but they underscore the importance of a thorough pre-purchase inspection and service history verification.
Run-Flat Tires: Love-Hate Relationship
Multiple owners complain about the Bridgestone run-flat tires. They ride harshly, are expensive to replace, and there’s no spare tire . “Those run flat tires ride very hard and are not cost effective for owners,” noted one reviewer .
Pro tip: When the run-flats wear out, consider switching to conventional performance tires and carrying a mobility kit or compact spare. The ride quality improvement is substantial.
Cargo Space and Practicality
The trunk offers between 9 and 14 cubic feet depending on configuration . That’s below average for the class. The hybrid model sacrifices even more space to the battery pack. J.D. Power owners specifically noted “amount of trunk/hatch space” as a dislike .
For road trips, pack light or utilize the rear seats for overflow. The Panoramic Moonroof (available on higher trims) adds an airy feel that partially compensates for the snug quarters.
Comparison: Protecting Your Q50 Investment
One way to enhance your ownership experience is with quality interior accessories. Here’s a look at popular options for keeping your Q50’s cabin pristine.
| Product Type | Best For | Installation Difficulty | Key Material | Price Range |
|---|---|---|---|---|
| WeatherTech FloorLiners | Maximum all-weather protection against snow, mud, and spills | Easy (Custom-fit) | High-Density Tri-Extruded Polyethylene | $180 – $260 (Front Row) |
| Husky Liners WeatherBeaters | Durable, rubber-like protection with a lower profile | Easy (Custom-fit) | Thermoplastic Elastomer (TPE) | $160 – $240 (Front Row) |
| Infiniti Cargo Tray | Protecting trunk carpet from spills and wear | Very Easy (Drop-in) | Molded Plastic with raised edges | $90 – $130 |
| Z1 Motorsports Aluminum Pedal Covers | Enhancing the sporty feel of the driver-focused cockpit | Moderate (May require drilling) | Brushed Aluminum with Rubber Grip | $80 – $120 |
| Infiniti Rear Bumper Protector | Preventing scratches when loading cargo | Easy (Adhesive-backed) | Stainless Steel or Carbon Fiber-look film | $60 – $100 |
Note: Price ranges are estimates and can vary based on retailer and specific model fitment.
2018 Infiniti Q50 Owner Satisfaction Ratings
Based on verified owner reviews aggregated from Cars.com, here’s how 2018 Q50 owners rate their cars across key categories.
FAQ: Your Questions About the 2018 Infiniti Q50 Answered
Q: What is Infiniti ProPILOT Assist™?
A: It’s a driver assistance system that combines Intelligent Cruise Control with Active Lane Control to keep you centered and at a safe distance on highways . The 2018 Q50 introduced this bundled technology package.
Q: How does Infiniti Intelligent AWD work?
A: It’s an on-demand system that normally sends power to the rear wheels. When it detects slippage, it can instantly transfer torque to the front wheels for maximum traction in rain or snow .
Q: Is the 2018 Infiniti Q50 reliable?
A: J.D. Power rates it “Average” for quality and reliability . Most owners report positive experiences, but there are isolated reports of infotainment failures and, rarely, engine issues . Service history matters.
Q: Does the 2018 Q50 support Apple CarPlay or Android Auto?
A: No. This is a common complaint. The 2018 model lacks Wireless Apple CarPlay® and Android Auto™ entirely . You’ll need to use Bluetooth or USB connections for phone integration.
Q: What’s the difference between the 3.0t and Red Sport 400?
A: The Red Sport 400 produces 400 horsepower versus the standard 3.0t’s 300 horsepower . It also includes unique exterior styling, red interior stitching, quilted seats, and standard Dynamic Digital Suspension.
Q: How much trunk space does the 2018 Q50 have?
A: Between 9 and 14 cubic feet, depending on configuration . The hybrid model has less due to battery placement. It’s below average for the class.
Q: Is the 2018 Q50 good for daily driving?
A: Yes, especially with the 3.0t engine. The ride is comfortable in standard mode, the seats are supportive, and the safety features are comprehensive . Just know that rear seat space is tight and trunk capacity is modest.
Q: What kind of fuel economy does it get?
A: Combined EPA ratings range from 19–27 MPG depending on engine and drivetrain . The four-cylinder is most efficient; the Red Sport 400 is predictably thirstier.
The Verdict: Is the 2018 Infiniti Q50 the Sweet Spot?
The 2018 Infiniti Q50 represents a compelling used luxury sedan value precisely because it’s not trying to be something it isn’t. It delivers genuine performance—especially in Red Sport 400 trim—wrapped in a sharp, refreshed design with a cabin that finally feels appropriately premium. The technology lags behind competitors, and the trunk is tight, but the driving experience remains engaging and the ownership costs are reasonable.
Here’s the bottom line: if you prioritize driving feel, value, and distinctive styling over the latest infotainment gadgets, the 2018 Q50 deserves a spot on your shopping list. Find one with the 3.0t engine, verify the service records, and enjoy 90% of the German experience for significantly less money.
What’s your favorite thing about the Q50? Are you team Red Sport 400 or does the 3.0t hit the sweet spot for you? Share your thoughts in the comments below.
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