NISSAN 52602 Engine Throttle Body 3.7L 182K

( Brand: Nissan ), ( Manufacturer Part Number: 52602 ), ( Custom Bundle: No ), ( Items Included: Throttle Valve ), ( Bore Diameter: Oem ), ( Make: Infiniti ), ( Year: 2009 2010 2011 2012 2013 2014 ), ( Manufacturer Warranty: 30 Day ), ( Fitment Type: Direct Replacement ), ( Type: Throttle Body )

Review NISSAN Infiniti 3.7l Engine Throttle Body Oem 182k Miles fits QX70 2009–2014

The **Nissan 52602 Throttle Body** is a precision-engineered component designed exclusively for the **2012, 2013, and 2014 Infiniti QX70** models equipped with the **3.7L V6 engine (VQ37VHR)**. This high-performance throttle body plays a critical role in regulating airflow into the engine, ensuring optimal throttle response, fuel efficiency, and overall drivability. Crafted from durable materials, including a robust **aluminum housing** and a **high-quality plastic throttle plate**, this part is built to withstand the demands of daily driving while maintaining smooth operation. The throttle body features a **mechanical cable linkage** for precise throttle control, allowing for seamless acceleration and a refined driving experience. Whether you're restoring a classic QX70 or upgrading an existing system, this **OEM-replacement throttle body** guarantees a perfect fit, matching the original specifications for reliability and performance. Its compatibility extends beyond basic repairs, making it an ideal choice for enthusiasts looking to enhance their vehicle s responsiveness or address issues like rough idling, stalling, or inconsistent throttle behavior. With its straightforward installation and long-lasting construction, this component is a must-have for anyone seeking to maintain or improve the performance of their Infiniti QX70 s engine bay.

### **Pros and Cons of Buying a Nissan/Infiniti QX70 (2012 2014) with a 3.7L Engine and Throttle Body Issues**

#### **Pros**

1. **Reliable Base Engine**

The 3.7L V6 (VQ37VHR) in the QX70 is a well-proven Nissan/Infiniti engine known for durability when maintained properly. It is less prone to catastrophic failure compared to some other V6s in its class, especially if the oil is changed regularly and the cooling system is intact.

2. **Good Fuel Economy for a V6 SUV**

The 3.7L engine typically achieves around **18 20 MPG city** and **24 26 MPG highway**, which is reasonable for a midsize SUV of its era. It performs better than many competing V8 or larger V6 engines in similar vehicles.

3. **Comfortable and Spacious Interior**

The QX70 offers a smooth ride, ample legroom, and a relatively quiet cabin compared to some competitors. The seating is comfortable for long drives, and the infotainment system (while dated) is functional for basic navigation and audio needs.

4. **All-Wheel Drive (AWD) Standard**

Most QX70 models come with AWD, which is beneficial for light off-road use, snow, or poor road conditions. This makes it more capable than many FWD SUVs of its time.

5. **Moderate Maintenance Costs (Compared to Some Competitors)**

While not cheap, the QX70 s maintenance costs are generally lower than those of luxury SUVs like the Lexus RX or Cadillac Escalade. Basic upkeep (oil changes, brakes, tires) is manageable for a used vehicle in this segment.

6. **Potential for Modifications**

The 3.7L engine has a strong aftermarket presence, allowing for upgrades like cold air intakes, performance exhausts, or even mild tuning. This can improve throttle response if the stock throttle body is a limiting factor.

7. **Affordable Used Market Price**

Due to its lack of luxury branding and some reliability concerns, the QX70 is often priced lower than comparable SUVs (e.g., Toyota Highlander, Honda Pilot). This makes it a budget-friendly option for a midsize AWD SUV.

---

#### **Cons**

1. **Throttle Body Issues (Common Problem)**

The most significant drawback of the 3.7L VQ37VHR engine in these years is **throttle body carbon buildup**, which can cause rough idling, hesitation, stalling, or poor acceleration. This issue is widespread and often requires professional cleaning or replacement of the throttle body (costing **$300 $600** depending on labor and parts).

- **Symptoms:** Check engine light (P0120, P0122, P0123), sluggish throttle response, stalling at stops.

- **Solution:** Cleaning the throttle body (DIY or shop) or replacing it if severely damaged. Some owners report success with **throttle body cleaners** (like CRC or Gunk), but deep carbon buildup may require mechanical cleaning.

2. **Transmission Problems (CVT or Automatic)**

- **CVT Models (2012 2014):** Nissan s early CVTs in the QX70 were prone to **overheating, slipping, and premature wear**, especially in stop-and-go traffic. Fluid changes are critical, but even with maintenance, CVTs can fail around **100,000 150,000 miles**.

- **Automatic (6-speed) Models:** Less common in the QX70 but generally more reliable than CVTs. However, any automatic transmission should be checked for smooth shifting and lack of grinding noises.

3. **Electrical and Infotainment Reliability**

The QX70 s infotainment system (especially in 2012 2013) has been criticized for **glitches, slow response, and occasional failure**. The radio and climate controls can be finicky, and some owners report issues with the **power windows or locks**.

- **Workaround:** A used aftermarket head unit (e.g., Pioneer or Kenwood) can improve functionality if the stock system is unreliable.

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

The QX70 s undercarriage and wheel wells are susceptible to **rust**, particularly in areas with salted roads. A thorough inspection of the **rocker panels, subframe, and wheel arches** is essential before purchase.

5. **Resale Value and Depreciation**

The QX70 has **poor resale value** compared to Toyota, Honda, or Lexus SUVs of the same era. If you plan to sell later, you may not recover much of your initial investment.

6. **Suspension Wear Over Time**

The QX70 s suspension (shocks, struts, bushings) tends to wear out around **80,000 100,000 miles**, leading to a **rougher ride** and reduced handling. Replacing worn suspension components can be costly.

7. **Limited Luxury Features**

Compared to competitors like the Lexus RX or Cadillac SRX, the QX70 lacks **premium materials, advanced safety tech (pre-collision braking, blind-spot monitoring), and refined ride quality**. It s more of a **practical, no-frills SUV** than a luxury vehicle.

8. **Recall History**

- **Throttle control issues** (P0120, P0122)

- **CVT fluid leaks**

- **Airbag system malfunctions**

- **Fuel pump failures**

---

### **Key Considerations Before Buying**

1. **Throttle Body Condition**

- **Must inspect:** Look for carbon buildup inside the throttle body (remove it and clean it if possible). If it s heavily fouled, factor in **$300 $600** for repair.

- **Test drive:** Listen for **hesitation, stalling, or rough idling**. A clean throttle body should have smooth, instantaneous throttle response.

2. **Transmission Health**

- **CVT models:** Check for **slipping, overheating, or delayed engagement**. Ensure the **CVT fluid has been changed recently** (every **60,000 miles**).

- **Automatic models:** Listen for **grinding or jerking** during shifts. A **transmission fluid check** is essential.

3. **Maintenance History**

- **Oil changes:** Must be done **every 5,000 7,500 miles** (synthetic oil recommended). A well-maintained engine can last **200,000 miles**, but neglect will lead to **rod bearing failure or oil sludge**.

- **Cooling system:** The 3.7L engine is **sensitive to overheating**. Check for **leaks, a functioning thermostat, and proper coolant levels**.

4. **Rust Inspection**

- **Check undercarriage, wheel wells, and frame rails** for rust. Minor rust can be sanded and sealed, but severe corrosion weakens structural integrity.

5. **Test Drive Focus Areas**

- **Acceleration:** Does the car pull smoothly, or does it hesitate?

- **Braking:** Listen for **squeaking or grinding** (worn pads/rotors).

- **Steering:** Should feel **firm but not overly stiff** (power steering fluid level check).

- **Suspension:** No **clunks over bumps** (indicates worn bushings or shocks).

6. **Budget for Potential Repairs**

- **Throttle body cleaning/replacement:** $300 $600

- **CVT fluid change:** $300 $500

- **Suspension replacement (shocks/struts):** $800 $1,500

- **Transmission issues (if severe):** $2,000 $4,000

- **Rust repair:** $200 $1,000 depending on extent

---

### **Final Recommendation**

You **prioritize reliability over luxury** and are willing to **budget for potential throttle body and transmission maintenance**.

The **throttle body is clean** (or you re prepared to clean/replace it).

The **transmission is in good condition** (no slipping, proper fluid levels).

The **vehicle has a full maintenance history**, especially **oil changes and cooling system upkeep**.

You **don t mind a dated infotainment system** and are okay with **basic safety features** (no advanced driver aids).

You **find a well-priced example** (aim for **under $8,000 $10,000** for a clean one).

**Avoid the QX70 if

Details:

This used item comes with a 30 Day Warranty Parts ONLY - NO Labor.

part #: 52602 prices

• $30.00-$108.08

specifications throobo:

• for models: Qx70
• for makes: Infiniti, Nissan
• for years: 2009-2014
• brand: Nissan
• mpn: 52602
• custom bundle: No
• items included: Throttle Valve
• bore diameter: Oem
• make: Infiniti
• year: 2009 2010 2011 2012 2013 2014
• manufacturer warranty: 30 Day
• fitment type: Direct Replacement
• type: Throttle Body

shipping throobo:

• class: Expedited
• type: Fixed
• cost: $0.00
• service: Expedited
• transit: 4-8 Days

offer throobo:

• started: April 30, 2026
• availability: In Stock
• quantity: 1
• sold: 0
• options: Ship-to-home
• best offers: True

general throobo:

• Car Truck Parts Accessories > Air Fuel Delivery > Throttle Bodies
• condition: Used

seller throobo:

• city: Homosassa, Florida
• rating: 99.2%
• # reviews: 7711

returns throobo:

• paid by: Seller
• policy: Returns Accepted
• time: 30 Days

payments throobo:

• other
• credit card: Diners-club
• wallet: Apple-pay

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