Everything you need to know before buying or avoiding a used Infiniti Q50 — model-by-model reliability data, common problems, safety ratings, engine specs, and expert buying advice all in one place.
The Infiniti Q50 is a compact luxury sports sedan manufactured by Infiniti — the premium automotive division of Nissan Motor Co. Launched for the 2014 model year as the direct successor to the beloved Infiniti G37, the Q50 was designed to compete head-to-head with the BMW 3 Series, Mercedes-Benz C-Class, Audi A4, and Lexus IS in the highly competitive entry-level luxury sedan segment.
Built on the FM (Front Midship) platform shared with the Nissan GT-R, the Q50 offers a near-ideal front-to-rear weight distribution and a rear-wheel-drive (or available all-wheel-drive) character that made it a driver-focused alternative to front-wheel-drive-based rivals.
The name “Q50” follows Infiniti’s renewed alphanumeric naming convention introduced in 2014, where “Q” denotes a car (sedan or coupe) and “50” indicates the displacement class. The Q50 was produced from 2014 through the 2024 model year, at which point Infiniti announced its discontinuation as the brand pivoted toward SUV-focused offerings and electrification.
Infiniti Q50 = a rear-wheel-drive (or AWD) compact luxury sedan produced from 2014 to 2024 by Infiniti (Nissan’s premium brand), featuring a twin-turbocharged V6 engine, sport-tuned suspension, and a driver-focused character in the tradition of the legendary G35/G37.
Understanding when each major change happened is key to buying the right Q50. Here is a complete chronological history of every significant update.
When shopping for a used Infiniti Q50, these are the model years that deliver the best combination of reliability, features, safety, and value. These recommendations are based on NHTSA complaint data, J.D. Power scores, RepairPal ratings, and real owner feedback.
The 2019–2021 model years represent the “sweet spot” for used Q50 buyers — they offer the most features, best safety equipment, and lowest complaint rates, while being 3–6 years old with reasonable depreciation. A well-maintained 2021 Q50 Red Sport 400 with under 50,000 miles is arguably the best used performance luxury sedan value under $35,000.
These model years have the highest number of NHTSA complaints, most recalls, poorest J.D. Power scores, and most expensive repair histories. Avoid them unless you can verify all recalls have been completed and the price is significantly discounted.
The 2014–2016 Infiniti Q50’s Direct Adaptive Steering (DAS) system — Infiniti’s steer-by-wire technology — was infamous for lagging, random failures, and a “disconnected” feel that some owners described as dangerous at highway speeds. Even after all recalls were completed, many 2014 units retained a fundamentally flawed steering character. Avoid the 2014 model entirely.
The table below combines data from NHTSA, J.D. Power, RepairPal, CarComplaints.com, and real owner reports to give you the most accurate picture of each model year’s reliability.
| Year | NHTSA Complaints | J.D. Power Score | Reliability Score | Major Issues | Verdict |
|---|---|---|---|---|---|
| 2014 | 140+ | 72/100 | Steering, brakes, driveshaft, airbags | AVOID | |
| 2015 | 118+ | 74/100 | Steering, brakes, infotainment | AVOID | |
| 2016 | 40 | 79/100 | Turbo failures, early DAS bugs | CAUTION | |
| 2017 | 18 | 82/100 | Minor electrical gremlins | GOOD BUY | |
| 2018 | 15 | 84/100 | Occasional turbo noise | GOOD BUY | |
| 2019 | 11 | 86/100 | Minor software updates needed | EXCELLENT | |
| 2020 | 8 | 87/100 | Very few reported | EXCELLENT | |
| 2021 | 5 | 89/100 | Virtually none | BEST YEAR | |
| 2022–24 | 4–7 | 88/100 | Very few, minor | EXCELLENT |
Knowing the most common Infiniti Q50 problems helps you inspect any used Q50 with confidence. Here are the most frequently reported issues across all model years.
Infiniti’s steer-by-wire system was revolutionary on paper but problematic in practice. DAS failures caused random steering lag, a “disconnected” feel, and in some cases complete steering loss. Multiple NHTSA investigations were opened. Infiniti eventually made DAS optional or removed it. This is the single biggest reason to avoid early Q50s.
Warped front brake rotors causing groaning, vibration, and reduced braking performance were the most common complaint on CarComplaints.com for 2014 and 2015 models. The issue appears to stem from undersized rotors relative to the car’s weight. Many owners had to replace rotors prematurely at 15,000–25,000 miles.
When Infiniti introduced the new 3.0T twin-turbo V6, early production units in 2016 experienced premature turbocharger failures. The turbos would make a whining or grinding noise before failing, sometimes as early as 60,000–80,000 miles. Later 2017+ units were improved, but any used 3.0T should receive a pre-purchase inspection specifically targeting turbo health.
The Q50’s dual-screen infotainment was innovative but buggy in early years. Owners reported random screen freezes, spontaneous reboots, unresponsive touchscreens, and Bluetooth connectivity drops. Infiniti pushed several software updates, and by 2019 the system had largely been stabilized.
A safety recall was issued for the 2014 Q50 regarding a potential driveshaft fracture that could cause loss of drive or sudden stopping. This is a safety-critical recall — always verify a 2014 unit’s VIN to ensure this was remedied.
A subset of 2014–2015 Q50s experienced faulty airbag sensor warnings and in some cases, airbags that may not deploy correctly in a collision. This was addressed by a recall but remains something to verify via a VIN check on any early Q50.
Always run a free NHTSA VIN check at nhtsa.gov before buying any Q50. Verify all outstanding recalls have been completed. On post-2016 turbocharged models, have a mechanic perform a turbo boost pressure test and listen for turbo whine. Check that the infotainment responds normally, and that the steering doesn’t feel unusually vague or laggy.
The Infiniti Q50 used several different engines across its production run. Understanding which engine is which helps you choose the right car — and avoid known problem variants.
| Engine | Years Available | Power Output | Transmission | Reliability | Notes |
|---|---|---|---|---|---|
| 3.7L V6 (VQ37VHR) | 2014–2015 | 328 hp / 269 lb-ft | 7-speed Auto | Average | Naturally aspirated, smooth but thirsty; paired with troubled DAS steering |
| 2.0T Turbo 4-Cyl | 2014–2019 | 208 hp / 258 lb-ft | 7-speed Auto | Average | Mercedes-sourced engine; decent economy but lacks character |
| Hybrid (3.5L + Motor) | 2014–2018 | 360 hp combined | 7-speed Auto | Average | Quick but complex; battery replacement costly after 100k miles |
| 3.0T Twin-Turbo V6 (300 hp) | 2016–2024 | 300 hp / 295 lb-ft | 7-speed Auto | Good | Best all-around engine. Avoid early 2016; prefer 2017+ for reliability |
| 3.0T Red Sport 400 Twin-Turbo | 2016–2024 | 400 hp / 350 lb-ft | 7-speed Auto | Good | 0–60 in ~4.5 sec. Same reliability caveats as 300 hp version |
For daily driving comfort: the 3.0T 300 hp in a 2019–2021 model is the perfect balance. For performance enthusiasts: the 3.0T Red Sport 400 in a 2019+ year is a remarkable value — 400 hp for the price of a base German luxury sedan. Avoid the 2.0T if possible; it lacks the character the Q50 is known for.
Safety is a top priority for any car buyer. Here’s a comprehensive look at how safe the Infiniti Q50 is, including crash test ratings and standard safety features by year.
The Q50 received 5-star overall ratings from NHTSA across most model years. The IIHS also awarded the Q50 “Good” scores in frontal, side, and roof crush tests. The headlight system received mixed marks in earlier years but improved in 2019+.
| Safety Feature | 2014–2016 | 2017–2018 | 2019–2021 | 2022–2024 |
|---|---|---|---|---|
| Forward Emergency Braking | Optional | Optional | ✅ Standard | ✅ Standard |
| Blind Spot Warning | Optional | Optional | Optional | ✅ Standard (Luxe+) |
| Lane Departure Warning | Optional | Optional | Optional | ✅ Standard (Luxe+) |
| Adaptive Cruise Control | Optional | Optional | Optional | ✅ Standard (Luxe+) |
| Around View Monitor (360°) | Optional | Optional | ✅ Standard (most) | ✅ Standard |
| Rear Cross-Traffic Alert | Optional | Optional | Optional | ✅ Standard (Luxe+) |
| Backup Collision Intervention | Optional | Optional | ✅ Standard | ✅ Standard |
| Apple CarPlay / Android Auto | ❌ No | ❌ No | Wired (2020) | ✅ Wireless |
Yes, the Infiniti Q50 is a safe car — especially post-2019 models with standard Forward Emergency Braking. The 2014–2015 models, however, had documented safety recalls (driveshaft, airbag sensor, DAS steering) that make them inherently riskier propositions unless all recalls are confirmed complete.
Follow this checklist when inspecting and purchasing any used Infiniti Q50 to avoid costly surprises.
One of the Infiniti Q50’s biggest advantages over its German rivals is its lower cost of ownership. Here’s what to expect.
| Service Item | Interval | Estimated Cost |
|---|---|---|
| Oil Change (synthetic) | Every 5,000–7,500 miles | $80–$140 |
| Brake Pad Replacement | Every 30,000–50,000 miles | $200–$400 per axle |
| Brake Rotor Replacement | Every 50,000–70,000 miles | $250–$500 per axle |
| Air Filter | Every 15,000–20,000 miles | $30–$60 |
| Spark Plugs (3.0T) | Every 60,000 miles | $200–$400 |
| Transmission Service | Every 60,000–100,000 miles | $150–$300 |
| Turbocharger Replacement | As needed (60,000–120,000 miles risk) | $1,500–$3,500 |
| Annual Maintenance Average | Per year | ~$640 (RepairPal estimate) |
At ~$640/year average maintenance cost, the Infiniti Q50 costs roughly 30–40% less to maintain annually than comparable BMW 3 Series or Mercedes C-Class models. This is a significant real-world advantage for budget-conscious luxury car buyers.
| Model | Reliability | Performance | Value | Practicality | Best For |
|---|---|---|---|---|---|
| Infiniti Q50 (2019–21) | ⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ | ⭐⭐⭐ | Performance value seekers |
| BMW 3 Series (F30/G20) | ⭐⭐⭐ | ⭐⭐⭐⭐⭐ | ⭐⭐⭐ | ⭐⭐⭐⭐ | Driving dynamics purists |
| Mercedes C-Class (W205) | ⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐ | ⭐⭐⭐⭐ | Interior luxury focus |
| Lexus IS 300/350 | ⭐⭐⭐⭐⭐ | ⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐ | Maximum long-term reliability |
| Audi A4 (B9) | ⭐⭐⭐ | ⭐⭐⭐⭐ | ⭐⭐⭐ | ⭐⭐⭐⭐ | Tech and all-weather buyers |
| Genesis G70 | ⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐⭐ | ⭐⭐⭐ | New-generation value rival |
Here are the most commonly asked questions about the Infiniti Q50 best and worst years, reliability, buying decisions, and ownership.
