INFINITI 149121LA5A Engine Evap Vapor Valve Service Port 2011-20 QX56 5.6L Hose

( Manufacturer Part Number: 149121LA5A ), ( Part Type: Valve Engine Hose ), ( Oe/oem Part Number: 149121la7a / 14912-1la7a ), ( Vintage Part: No ), ( Universal Fitment: Direct Replacement ), ( Finish: Undefined ), ( Country Of Origin: Japan )

Review INFINITI 2011 20 5.6l Engine Evap Vapor Valve Service Port Hose Oem fits QX80

The **Infiniti QX80/QX56 (Model Code: 149121LA5A, 2011 2020, 5.6L V8 Engine) EVAP Vapor Valve Service Port Hose** is a precision-engineered component designed to maintain the integrity and efficiency of the vehicle s evaporative emission control system (EVAP). This hose serves as a critical conduit within the EVAP system, connecting the **EVAP vapor valve** a key regulator of fuel vapors to the rest of the system, including the canister purge valve, fuel tank, and charcoal canister. Crafted from high-quality, durable materials, this hose is engineered to withstand the rigors of automotive operation, including exposure to engine heat, fuel vapors, and fluctuating temperatures, ensuring long-term reliability and leak-free performance.

The **service port hose** is specifically tailored to the **5.6L V8 engine** found in the Infiniti QX80 and QX56 models produced between 2011 and 2020, making it a direct-fit replacement for OEM applications. Its design incorporates reinforced walls and a flexible yet robust construction to accommodate movement and vibration without compromising structural integrity. The hose features a **secure, interference-fit connection** at both ends, ensuring a tight seal that prevents vapor leaks, which could trigger the **Check Engine Light (CEL)** or compromise emissions compliance. Additionally, the material composition is resistant to oil, fuel, and ozone degradation, extending its lifespan and reducing the risk of premature failure.

For maintenance and diagnostic purposes, this hose is equipped with a **service port**, allowing technicians to access the EVAP vapor valve for testing, cleaning, or replacement without disassembling the entire system. This accessibility simplifies troubleshooting procedures, such as checking for blockages, verifying proper vacuum flow, or recalibrating the system after repairs. Whether addressing a **failing EVAP system**, preparing for routine maintenance, or replacing a worn-out component, this hose ensures that the vehicle s emissions control system operates at peak efficiency, adhering to strict automotive standards and Infiniti s performance expectations. Its compatibility with the **QX80 and QX56** models underscores its importance in maintaining the vehicle s drivability, fuel economy, and environmental compliance.

### **Pros and Cons of Buying a 2011 2013 Infiniti QX80/QX56 with a 5.6L Engine (VIN: 149121LA5A)**

#### **Pros**

1. **Strong Engine and Performance**

The 5.6L V8 (VQ35DE) is a robust, naturally aspirated engine known for reliability when properly maintained. It produces **330 350 hp** and **346 lb-ft of torque**, offering strong towing capacity (up to **5,500 lbs** with a towing package) and a smooth driving experience. This makes it well-suited for families, SUV enthusiasts, or those needing a capable vehicle.

2. **Spacious and Comfortable Interior**

The QX80/QX56 features a **large cabin** with **seating for seven** (or five in the QX56), high-quality materials, and a **luxurious feel** comparable to premium sedans. The rear seats are roomy, and the cargo space is generous (up to **20.6 cu. ft.** behind the third row).

3. **Safety Features**

- **Stability control**

- **Traction control**

- **Anti-lock brakes (ABS)**

- **Multiple airbags**

- **Side curtain airbags** (in later models)

Some trims include **blind-spot monitoring** and **rear cross-traffic alert**, which are valuable for an SUV of this size.

4. **Reliability (When Maintained Properly)**

The VQ35DE engine is **less prone to major failures** compared to some turbocharged or diesel engines in similar vehicles. However, **oil consumption** is a known issue some owners report burning **1 quart per 1,000 2,000 miles**, which can be costly if not addressed. Regular oil changes and monitoring oil levels are critical.

5. **Resale Value and Brand Prestige**

Infiniti has historically held its value better than some domestic brands, and the QX80/QX56 carries a **luxury SUV reputation**. This can make it easier to sell or trade in later.

6. **Available Tech and Comfort Options**

- **Leather seats with heating/ventilation**

- **Power-adjustable seats**

- **Heated steering wheel**

- **Premium sound systems**

- **Backup camera** (on later models)

- **Navigation systems**

7. **Good Fuel Economy for a V8 SUV**

While not great (around **14 16 MPG city / 20 22 MPG highway**), it s **better than many full-size V8 SUVs** from competitors like Chevrolet or Ford.

8. **AWD Capability**

The **AWD models** provide excellent traction in snow and wet conditions, making them a practical choice for regions with harsh winters.

---

#### **Cons**

1. **High Maintenance Costs**

- **Oil consumption** is a major issue some owners spend **$500 $1,500/year** on oil changes and potential engine repairs if it s severe.

- **Transmission issues** (especially in early models) can arise, such as **rough shifting or failure** in the **6-speed automatic** (common in the QX80).

- **Timing chain stretch** can lead to **knocking noises and reduced performance** over time.

- **Suspension wear** (struts, bushings) is common due to the vehicle s size and weight.

2. **Rust and Body Issues**

The QX80/QX56 is **susceptible to rust**, particularly in the **wheel wells, rocker panels, and undercarriage**. A thorough inspection of the **underbody and frame** is essential before purchase.

3. **Poor Fuel Efficiency**

At **14 16 MPG city**, this SUV is **expensive to operate** compared to modern hybrids or smaller SUVs. Gas prices add up quickly.

4. **Outdated Tech and Infotainment**

The **infotainment system** (if equipped) can be **clunky and slow**, with limited connectivity options. Later models (2013 ) improved slightly, but it s still **not as advanced** as competitors like the Lexus RX or Cadillac Escalade.

5. **Comfort and Ride Quality**

- The **QX80 is heavier and less nimble** than smaller luxury SUVs.

- **Road noise** can be intrusive, especially on highways.

- **Seat comfort** varies some owners find the front seats firm, while others appreciate the support.

6. **Recall and Safety Concerns**

- Some models had **recalls for airbag issues** (Takata) and **transmission problems**.

- **Evaporative emission system (EVAP) leaks** (related to the **vapor valve service port hose**) can cause **check engine lights** and poor performance if not fixed.

7. **Depreciation**

While Infiniti holds value better than some brands, the QX80/QX56 has **depreciated significantly** since its peak. If you plan to keep it long-term, expect **lower resale value** than a Lexus or Toyota SUV.

8. **Parts and Repair Costs**

- **Infiniti dealership labor rates** are often **higher than independent shops**.

- **Aftermarket parts** may not always fit perfectly, leading to additional costs.

---

### **Key Considerations Before Buying**

1. **Service History is Critical**

- **Oil changes every 5,000 7,500 miles** (or as recommended) are **non-negotiable**.

- **Transmission fluid changes** (every 60,000 miles) help prevent failure.

- **Check for oil leaks** under the valve cover and around the **oil filter housing**.

2. **Inspect for Rust and Structural Damage**

- Look for **corrosion in the wheel wells, frame rails, and undercarriage**.

- A **pre-purchase inspection (PPI) by a mechanic** is **highly recommended**.

3. **Test the EVAP System (Vapor Valve Service Port Hose)**

- A **leak in the EVAP system** can cause **fuel efficiency drops and check engine lights**.

- The **hose should be intact**, and the **vapor valve should function properly**.

4. **Check Transmission and Drivetrain**

- Listen for **unusual noises** (grinding, whining) during acceleration.

- **Test the AWD system** (if equipped) to ensure it engages smoothly.

5. **Negotiate Based on Known Issues**

- If the car has **oil consumption problems**, **transmission wear**, or **rust**, **factor in repair costs** when pricing.

- Some buyers **offer $2,000 $5,000 less** than asking price for a used QX80/QX56 with these issues.

---

### **Final Recommendation**

You **prioritize space, towing capacity, and a comfortable ride** over fuel efficiency.

You **find a well-maintained example** with **full service records**, especially for **oil changes and transmission care**.

You **plan to drive it sparingly** (under **10,000 15,000 miles/year**) and **budget for potential repairs**.

You **prefer Infiniti s luxury feel** over a more modern or fuel-efficient alternative (e.g., Lexus RX, Toyota Sequoia, or a used Cadillac Escalade).

You **inspect it thoroughly** (or hire a mechanic to do so) and **are prepared for higher maintenance costs**.

You **cannot afford or do not want to deal with oil consumption and potential engine issues**.

You **need better fuel economy** consider a **hybrid (Toyota Highlander Hybrid) or a smaller diesel SUV (Ram 2500 Cummins)**.

You **find significant rust or transmission problems** these can turn into **expensive repairs**.

You **want modern tech** the infotainment and safety features are **outdated compared to newer luxury SUVs**.

---

### **Alternatives to Consider**

- **2012 2015 Lexus RX 350** (more refined, better resale, V6 engine)

- **2013 2016 Toyota Sequoia** (more reliable, better fuel economy than the QX80)

- **2014 Cadillac Escalade (Hybrid or diesel)** (more modern tech, better safety)

- **20

Details:

Warranty All parts including engines, transmissions, transfer cases, differentials, batteries come with 30 day warranty. Please verify it fits and is compatible with your specific model before purchasing. Shipping FREE SHIPPING available for most items within lower 48 states. Mileage: 167K MILES.

Donor vehicle: 2019 INFINITI QX80 LUXE 5.6L V8 AWD AUTOMATIC TRANSMISSION. This item has been previously used. Color: GRAY KAD-GRAPHITE SHADOW EXTERIOR / BLACK G-GRAPHITE INTERIOR.

part #: 149121la5a prices

• $30.35-$375.00

specifications emissyste:

• for models: Qx80
• for makes: Infiniti
• mpn: 149121la5a
• part type: Valve Engine Hose
• oe/oem part number: 149121la7a / 14912-1la7a
• vintage part: No
• universal fitment: Direct Replacement
• finish: Undefined
• country of origin: Japan

shipping emissyste:

• class: Standard
• transit: 4-9 Days
• service: Standard
• type: Fixed
• cost: $0.00

returns emissyste:

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

general emissyste:

• condition: Used
• Car Truck Parts Accessories > Exhaust Emission Systems > Other Exhaust Emission Parts

seller emissyste:

• city: Traverse City, Michigan
• rating: 99.9%
• # reviews: 95286

offer emissyste:

• quantity: 1
• availability: In Stock
• best offers: True
• started: May 18, 2026
• sold: 0
• options: Ship-to-home

payments emissyste:

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

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