INFINITI Engine Crankshaft Crank Shaft 303.IN1T17

( Manufacturer Part Number: QX50 ), ( Part Type: Engine Crankshaft Crank Shaft ), ( Conditions Options: 4, 3.7, At, Awd ), ( Genuine Oem: Yes ), ( Ipn: 303.in1t17 ), ( Descriptionpartcondition: The Pictures Are Of The Exact Part You Will Recieve. This Is A Hi ), ( Manufacturer Warranty: 60 Day )

Review INFINITI Engine Crankshaft Crank Shaft Oem fits QX50 303 2014–2017

The **Infiniti 303 (QX50) VQ30DEH1T (IN1T17) 3.0L V6 Engine Crankshaft** is a precision-engineered, high-performance component designed exclusively for the 2014 2017 Infiniti QX50 (and its sibling, the Nissan Rogue Sport) equipped with the advanced **VQ30DEH1T** inline-six engine. This crankshaft is a critical element of the drivetrain, responsible for converting the linear motion of the pistons into rotational force that drives the vehicle s transmission and wheels. Crafted from **high-grade forged steel**, this crankshaft is engineered to withstand the demanding stresses of modern automotive performance, delivering exceptional durability, smooth operation, and optimal power delivery across a wide RPM range.

The **IN1T17 VQ30DEH1T crankshaft** features a **five-main-bearing design**, which enhances rigidity and reduces vibration, ensuring a quieter, more refined ride while maintaining structural integrity under high loads. Its **counterweighted configuration** is meticulously balanced to minimize torsional forces, reducing engine strain and improving overall efficiency. The crankshaft s **precision-machined journals** and **optimized fillets** are designed to handle the torque output of the VQ30DEH1T engine, which produces approximately **271 horsepower and 222 lb-ft of torque** in its standard form, with potential for increased performance in tuned applications. The **nitrided or induction-hardened surfaces** on critical areas provide superior wear resistance, extending the component s lifespan even under aggressive driving conditions or aftermarket modifications.

This crankshaft is fully compatible with the **2014 2017 Infiniti QX50 (IN1T17 model year)** and its **2015 2017 Nissan Rogue Sport (IN1T17/IN1T18)** variants, ensuring an exact fit for engines equipped with the **VQ30DEH1T** powertrain. Whether replacing a worn-out original crankshaft or upgrading for enhanced performance, this aftermarket part is built to **OEM specifications**, guaranteeing seamless integration with the engine s rod bearings, timing system, and harmonic balancer. Its **high-quality construction** and **rigorous quality control** make it a reliable alternative to OEM components, offering the same level of performance without the premium pricing often associated with factory parts.

For enthusiasts and mechanics seeking a **direct replacement or performance upgrade**, this crankshaft is an ideal choice, combining **durability, precision engineering, and compatibility** to ensure optimal engine function. Whether used in stock applications or as part of a **tuned or turbocharged setup**, the **IN1T17 VQ30DEH1T crankshaft** delivers the strength and reliability needed to keep the Infiniti QX50 s powerful V6 running at its best for thousands of miles. Proper installation, along with the use of high-quality lubricants and maintenance, will further extend its service life, ensuring a smooth, powerful, and dependable driving experience.

### **Pros and Cons of Buying a Used Infiniti QX50 (2014 2017) with a 3.7L V6 (IN1T17) Engine and Crankshaft Issues**

#### **Overview**

The **2014 2017 Infiniti QX50** with the **3.7L V6 (IN1T17)** engine is a solid mid-size SUV, but like many vehicles, it has strengths and weaknesses especially regarding **crankshaft and engine longevity**. Below is a detailed breakdown of the key factors to consider before purchasing one with potential crankshaft concerns.

---

### **Pros of the 2014 2017 Infiniti QX50 (IN1T17 Engine)**

1. **Reliable Engine (When Well-Maintained)**

- The **3.7L V6 (IN1T17)** is a **Nissan/Infiniti V6** (shared with the Altima, Maxima, and Rogue) known for **good power (280 300 hp)** and **smooth operation** when properly maintained.

- **No major engine design flaws** compared to some competitors (e.g., the **3.5L V6 in the QX60**, which had timing chain issues).

- **Good fuel economy** for a V6 SUV ( 18 20 MPG city, 24 26 MPG highway).

2. **Comfortable & Spacious Interior**

- **Upscale cabin** with **high-quality materials** (especially in higher trims like **EX, Sport, or Platinum**).

- **Generous rear legroom** (better than many rivals like the Honda Pilot or Toyota Highlander).

- **Quiet ride** with **good sound insulation**, making it pleasant for long drives.

3. **Smooth Transmission Options**

- **6-speed automatic (CVT in earlier models, traditional auto in later years)** The **2016 models** came with a **6-speed automatic**, which is more refined than the CVT.

- **Responsive steering** and **well-tuned suspension** (adjustable dampers in higher trims).

4. **Safety & Standard Features**

- **Standard safety tech** (blind-spot monitoring, rear cross-traffic alert, lane departure warning in higher trims).

- **Good crash test ratings** (IIHS Top Safety Pick in some years).

- **Available tech** (Infotainment with **Apple CarPlay/Android Auto**, **NissanConnect** in some models).

5. **Resale Value & Brand Perception**

- **Infiniti has improved reliability** over the past decade, making used QX50s hold value better than some competitors.

- **Luxury SUV appeal** many buyers prefer Infiniti s **Japanese reliability** over German brands with higher maintenance costs.

6. **Moderate Maintenance Costs**

- **Cheaper to maintain than German luxury SUVs** (BMW X5, Mercedes GLK).

- **Common issues (like crankshaft wear) are often fixable** with **reasonable labor costs** (especially if done at a **Nissan/Infiniti dealership**).

---

### **Cons & Potential Issues (Especially with Crankshaft Concerns)**

1. **Crankshaft & Engine Wear (Main Concern)**

- **Some 2014 2017 QX50s with the IN1T17 engine** have reported **crankshaft wear or rod bearing failure**, particularly in **higher-mileage examples (100K miles)**.

- **Knocking or rattling from the engine** (especially under load or acceleration).

- **Blue smoke from exhaust** (indicating oil burning).

- **Check Engine Light (CEL) with codes P0010, P0011, P0012, P0016** (timing chain/crankshaft position sensor issues).

- **Reduced power or rough idle**.

- **Cause:** **Worn crankshaft journals or rod bearings** due to **oil sludge buildup** (common in **under-maintained engines**).

- **Repair Cost:** **$1,500 $3,500 ** (depending on whether just **crankshaft bearings** need replacement or if the **entire engine needs a rebuild**).

2. **CVT Transmission Issues (2014 2015 Models Only)**

- **Early models (2014 2015) used a CVT**, which has a **reputation for premature failure** (especially in **hot climates**).

- **Rough shifting or hesitation**.

- **Overheating transmission fluid**.

- **Slipping or no revving**.

- **Repair Cost:** **$2,500 $4,500** (transmission replacement).

- **Solution:** **2016 models switched to a 6-speed automatic**, which is **more reliable**.

3. **Oil Consumption & Sludge Buildup**

- Some owners report **excessive oil consumption** (1 quart per 1,000 miles in severe cases).

- **Oil sludge** can form if **oil changes are neglected**, leading to **engine damage**.

- **Prevention:** **Strict oil change schedule (every 5,000 7,500 miles)** with **high-quality synthetic oil**.

4. **Infotainment System Glitches**

- **Early models (2014 2015) had a clunky infotainment system** with **slow response and software bugs**.

- **2016 models improved** with **faster touchscreen and better connectivity**.

- **No major mechanical issues**, but **software updates may be needed**.

5. **Rear Seat Comfort & Cargo Space**

- **Rear seats are comfortable but not as spacious as competitors** (e.g., Toyota Highlander, Honda Pilot).

- **Cargo space is decent ( 36.6 cu. ft.) but not exceptional** compared to larger SUVs.

6. **Rust Concerns (Especially in Snowy Regions)**

- Some **2014 2015 models** had **rocker panel rust issues** (common in cold climates).

- **Check undercarriage and wheel wells** before buying.

---

### **Key Questions to Ask Before Buying a Used QX50 with Crankshaft Concerns**

1. **Has the engine had any major work?**

- Ask for **service records** especially **oil changes, timing chain inspections, and crankshaft bearing checks**.

- **If the seller says "no issues," get a pre-purchase inspection (PPI).**

2. **What are the symptoms of engine noise?**

- **Knocking, rattling, or ticking?** This could indicate **crankshaft or rod bearing wear**.

- **Has the seller replaced any engine components?** (e.g., **crankshaft bearings, rods, or timing chain**).

3. **What transmission does it have?**

- **2014 2015 CVT (riskier).**

- **2016 6-speed automatic (better).**

4. **How often were oil changes done?**

- **Every 5,000 7,500 miles?** (Critical for preventing sludge and crankshaft wear.)

- **Was synthetic oil used?**

5. **Has the vehicle been in an accident?**

- **Check for frame damage or misaligned parts**, which can lead to **premature wear**.

6. **What is the seller s justification for the price?**

- **If the price is too good to be true**, it may be hiding **major engine issues**.

---

### **Recommendation: Should You Buy One?**

**You find a well-documented example** with **full service records**, **no engine noise**, and **proper oil maintenance**.

**The seller provides a pre-purchase inspection (PPI) report** confirming **no crankshaft or transmission issues**.

**You re okay with a 6-speed automatic (2016 models)** and **avoid CVT models (2014 2015)**.

**You re prepared for potential repairs** (budget **$1,500 $3,500** for crankshaft work if needed).

**You prefer Infiniti s reliability over German luxury SUVs** (which have higher maintenance costs).

**The seller cannot provide service records** or **refuses a PPI**.

**You hear knocking, ticking, or rough engine noise** during test drives.

**The transmission is a CVT (2014 2015)** unless you re confident in its condition.

**The vehicle has high mileage (120K miles) with no proof of maintenance**.

**You re not comfortable with potential engine repairs** (crankshaft work is **expensive and labor-intensive**).

#### **Best Alternatives if You Want a Similar

Details:

It is stored in doors and ready to be shipped. Donor Vehicle - 2017 QX50. Warranty: All parts come with our standard 60 day warranty. Stock Number - 2530.

4 ,3.7,AT,AWD.

specifications cranshafengin:

• for models: Qx50, 303
• for makes: Infiniti
• for years: 2014-2017
• mpn: Qx50
• part type: Engine Crankshaft Crank Shaft
• conditions options: 4, 3.7, At, Awd
• genuine oem: Yes
• ipn: 303.in1t17
• descriptionpartcondition: The Pictures Are Of The Exact Part You Will Recieve. This Is A Hi
• manufacturer warranty: 60 Day

shipping cranshafengin:

• class: Standard
• cost: $0.00
• service: UPS Ground
• carrier: UPS
• transit: 2-7 Days
• type: Fixed

offer cranshafengin:

• options: Ship-to-home
• sold: 0
• best offers: True
• quantity: 1
• started: February 11, 2026
• availability: In Stock

returns cranshafengin:

• policy: Returns Accepted
• paid by: Buyer
• time: 60 Days

seller cranshafengin:

• rating: 99.6%
• city: Sauk Centre, Minnesota
• # reviews: 27063

payments cranshafengin:

• other
• wallet: Apple-pay
• credit card: Visa

general cranshafengin:

• condition: Used
• Car Truck Parts Accessories > Engines Engine Parts > Crankshafts

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