fits model: Awd. make: Infiniti. year: 2016–2023.

( Manufacturer Part Number: 31020-4GA1E ), ( Type: Automatic Transmission ), ( Universal Fitment: No )
The **Infiniti Q50 3.0T (Part Number: 31020-4GA1E) Automatic Transmission (2016 2023)** is a high-performance, all-wheel-drive (AWD) powertrain module designed to deliver seamless, responsive, and efficient shifting for the sporty yet refined Q50 sedan. Engineered by Infiniti s advanced engineering team, this transmission is a key component of the Q50 s **3.0-liter turbocharged inline-4 (VQ30HR) engine**, producing a robust **306 horsepower and 306 lb-ft of torque**, which it efficiently channels through a **7-speed dual-clutch automatic transmission (7DCT250)**. The **4GA1E** designation signifies a sophisticated, electronically controlled system that integrates with the engine s turbocharged output to provide rapid, precise gear changes ideal for both spirited driving and smooth highway cruising. With its **AWD architecture**, this transmission ensures optimal power distribution between the front and rear axles, enhancing traction, stability, and handling in various road conditions, from wet surfaces to aggressive cornering. The **automatic transmission** features **shift-by-wire technology**, eliminating traditional mechanical linkages for more responsive and programmable shifting, while its **adaptive shift logic** continuously optimizes gear selection based on driving dynamics, throttle input, and load conditions. Built to Infiniti s rigorous standards, this transmission is engineered for durability, incorporating **high-strength materials, advanced cooling systems, and a robust drivetrain interface** to withstand the demands of daily driving as well as performance-oriented use. Whether navigating city streets, winding mountain roads, or merging onto highways, the **31020-4GA1E transmission** ensures a harmonious blend of power delivery, efficiency, and driving enjoyment, embodying Infiniti s commitment to performance, luxury, and cutting-edge automotive technology.
### **Pros and Cons of buying a Infiniti Q50 (2016 2023) with the 3.0L Turbocharged V6 (31020-4GA1E) and Automatic AWD**
#### **Pros**
1. **Strong Engine and Performance**
The 3.0L V6 turbocharged engine (31020-4GA1E) produces **306 320 horsepower** (depending on the year) and **300 311 lb-ft of torque**, delivering responsive acceleration and a smooth power delivery. It pairs well with the **7-speed automatic transmission**, offering crisp shifts and a sporty driving experience.
2. **All-Wheel Drive (AWD) Capability**
The AWD system enhances traction in various conditions, including wet or snowy roads, making it a practical choice for drivers who need extra stability without sacrificing performance.
3. **Refined and Comfortable Ride**
The Q50 is built on a **stiff unibody chassis** with well-tuned suspension, providing a balanced mix of comfort and sportiness. The cabin is quiet, with good sound insulation, making for a pleasant long-term driving experience.
4. **Modern Infotainment and Tech Features**
Later models (2018 ) come with **Apple CarPlay and Android Auto**, a **10.2-inch touchscreen**, and available **head-up display**. The **NissanConnect infotainment system** (though sometimes laggy) includes Bluetooth, USB ports, and wireless charging in newer trims.
5. **Sporty Handling and Driver Engagement**
The Q50 is designed for performance-oriented buyers, with features like **adaptive damping, a limited-slip differential (in some models), and available sport-tuned suspension**. The steering is precise, and the car handles well in both city and highway driving.
6. **Good Safety Ratings**
The Q50 has earned **IIHS Top Safety Pick (2018 2023)** for its strong crash test performance, including excellent front crash protection and available **ProPilot Assist semi-autonomous driving** (2019 ).
7. **Luxury and Styling**
The Q50 offers a **premium interior** with high-quality materials (especially in higher trims like **Q50 Touring or Q50 Premium**), ambient lighting, and available **heated/ventilated seats**. The exterior design is sleek and aggressive, appealing to those who want a sporty yet refined sedan.
8. **Reliability Compared to Competitors**
While no car is perfect, the **3.0L V6 turbo** in the Q50 has shown **fewer major reliability issues** compared to some rivals (e.g., BMW s N20 engine had known turbocharger problems). However, **oil consumption** has been a recurring complaint in some early models (2016 2017), which Nissan addressed in later years.
9. **Resale Value**
The Q50 holds its value **better than many luxury sedans**, particularly in the **Q50 Touring and Premium trims**, making it a smart long-term investment.
10. **Available Performance Upgrades**
The **Q50 Nismo** (a performance variant) offers **333 hp, a lower stance, and sport-tuned suspension**, making it a great option for enthusiasts who want extra power and handling.
---
#### **Cons**
1. **Oil Consumption (Early Models 2016 2017)**
Some owners reported **excessive oil consumption (up to 1 quart per 1,000 miles)** in the early 2016 2017 models. Nissan issued a **recall and software update** to mitigate this, but affected engines may still require **frequent oil top-ups**. Later models (2018 ) improved reliability in this area.
2. **Turbocharger and Valvetronic Issues**
The **3.0L turbo V6** has had reports of **turbocharger failures** and **Valvetronic actuator problems** (which control throttle response). These issues can be costly to repair, often requiring **engine rebuilds or replacements**.
3. **Infotainment System Lag and Glitches**
The **NissanConnect system** (especially in older models) can be **slow to respond**, with occasional **freezing or touchscreen issues**. While newer models (2019 ) have improvements, it s still not as smooth as competitors like BMW or Mercedes.
4. **Interior Quality Variability**
While the **higher trims (Touring, Premium)** have a **luxurious feel**, the **base models (Q50 S)** use **cheaper plastics and less refined materials**, making the cabin feel less premium.
5. **Fuel Economy Not Exceptional**
The **3.0L turbo V6** delivers **good power but not great fuel efficiency** expect **around 18 22 MPG city / 26 30 MPG highway** (AWD models will be slightly worse). This is **below competitors like the BMW 330i or Audi A4**.
6. **Limited Rear Legroom**
The Q50 has **tight rear legroom** (especially in the back seats), making it less ideal for **tall passengers or families**. The trunk is **decently sized (15.7 cu. ft.)**, but not as spacious as some rivals.
7. **Higher Maintenance Costs Than Japanese Alternatives**
While not as expensive as German luxury brands, **Infiniti s service costs** (especially for turbocharged engines) can be **higher than Toyota/Audi** due to **specialized parts and labor**.
8. **Some Noise Intrusion at High Speeds**
While the cabin is quiet at low speeds, **wind and road noise become noticeable at highway speeds**, though not as bad as some competitors.
9. **Limited Availability of Parts and Mechanics**
Infiniti dealerships are **less common than Toyota/Honda**, meaning **finding independent mechanics familiar with the Q50 may be harder** in some regions.
10. **Resale Depreciation (Compared to Luxury Brands)**
While better than most non-luxury sedans, the Q50 **does not hold value as well as BMW, Mercedes, or Lexus** over time.
---
### **Conclusion**
The **2016 2023 Infiniti Q50 with the 3.0L turbo V6 (31020-4GA1E) and AWD** is a **well-rounded performance sedan** that appeals to buyers who want **a sporty, refined, and capable luxury car** without the high price tag of German brands. It excels in **handling, power delivery, and long-term comfort**, making it a **great choice for enthusiasts who prioritize driving dynamics over pure luxury**.
However, **potential buyers should be aware of:**- **Oil consumption and turbocharger reliability** (especially in **2016 2017 models**).
- **Infotainment system quirks** (though improved in later years).
- **Higher maintenance costs** compared to Japanese alternatives.
**If you find a well-maintained example (especially 2018 ), with documented service records and no major engine issues, the Q50 is a fantastic buy.** It offers **more performance than a Camry or Accord** while still being **more practical and luxurious than a Mustang or Camaro**.
---
### **Final Recommendation**
**Buy if:**- You want a **sporty, AWD sedan** with **strong power and good handling**.
- You prioritize **driving enjoyment over pure luxury**.
- You **inspect the engine for oil consumption and turbo health** (especially in pre-2018 models).
- You re okay with **Infiniti s infotainment system limitations**.
- You prefer **better value than BMW/Audi** but still want a **premium feel**.
**Avoid if:**- You **need maximum fuel efficiency** (consider a hybrid or diesel alternative).
- You **require ultra-luxurious interiors** (higher trims help, but base models feel cheap).
- You **can t afford potential turbocharger or Valvetronic repairs**.
- You **prefer a more established luxury brand** with better resale.
**Best Years to Buy:**- **2018 2023** (improved reliability, better tech, refined engine tuning).
- **2017 (with full service history)** if you can verify no oil consumption issues.
**Final Verdict:**The **Infiniti Q50 is one of the best-loved performance sedans in its class**, offering **a perfect blend of sportiness, comfort, and practicality**. With **proper maintenance and due diligence**, it can be a **fantastic long-term purchase** for the right buyer.
The aluminum housing is solid with no cracks or damaged mounting ears. It is a clean factory original part, perfect for high-quality replacement. This transmission comes from a well-maintained donor vehicle with low, verified mileage of only 53,000 miles. It was thoroughly tested before removal and shifted smoothly through all 7 gears without any hesitation, slips, or abnormal noises.
Up for sale is a genuine OEM Factory 7-speed Automatic Transmission assembly removed from 2019 Infiniti Q50 equipped with the 3.0L Twin Turbo engine VR30DDTT.