INFINITI AY03111001 Infinity Left Cylinder Head Camshafts QX56 5.6L

( Manufacturer Part Number: AY03111001 ), ( Type: Cylinder Head Assembly ), ( Oe/oem Part Number: Oem ), ( Material: Aluminum )

Review INFINITI Infinity 5.6l Left Drivers Side Cylinder Head Camshafts fits QX80 2011–2015

The **Infiniti QX56/QX80 (2011-2015) 5.6L V8 (AY03111001) Left Cylinder Head Camshafts** are precision-engineered components designed to deliver optimal performance, reliability, and longevity for one of the most powerful and luxurious SUVs in its class. These high-performance camshafts are specifically tailored for the **VR38DETT 5.6-liter naturally aspirated V8 engine**, which powers the Infiniti QX56 and QX80, offering a seamless blend of torque, responsiveness, and smooth operation. Crafted from premium forged steel and meticulously machined to exacting tolerances, these camshafts feature **contoured lobes and optimized lift profiles** that enhance engine breathing, improve throttle response, and maximize power output while maintaining a refined, linear power delivery. The left cylinder head camshaft, in particular, plays a critical role in synchronizing the intake and exhaust events, ensuring balanced cylinder pressure and minimizing valve float at higher RPMs, which is essential for sustaining peak performance during spirited driving or extended highway cruising. Whether you're seeking a performance upgrade, a restoration project, or a replacement for worn components, these camshafts are engineered to meet the exacting standards of the original equipment manufacturer (OEM), providing a direct fit with minimal modifications required. Their robust construction and precision engineering make them ideal for both stock applications and those looking to fine-tune their engine s character, whether for daily driving, towing, or track use. With a focus on durability and performance, these camshafts are a trusted choice for enthusiasts and professionals alike who demand nothing less than excellence from their Infiniti s powerplant.

### **Pros and Cons of Buying a 2011-2015 Infiniti QX56/QX80 (AY03111001) with Left Cylinder Head Camshaft Issues**

1. **Strong V8 Engine (5.6L)** The 5.6L V8 is a robust powerplant, capable of producing around 370 400 horsepower and 379 lb-ft of torque, providing a smooth and responsive driving experience. It s a well-proven engine in Infiniti s lineup, known for reliability in its base form.

2. **Luxury and Comfort** The QX56/QX80 is a full-size luxury SUV with premium interior materials, advanced infotainment (if equipped with the latest systems), and a spacious cabin. The ride quality is refined, making it comfortable for long drives.

3. **Resale Value** Infiniti s luxury SUVs, especially the QX series, hold their value relatively well compared to some competitors, though not as strongly as Lexus or Cadillac.

4. **Potential for Modifications** The V8 platform allows for aftermarket tuning, exhaust upgrades, and other modifications, which could enhance performance if the engine is in good condition.

5. **Availability of Parts** As a relatively common luxury SUV, parts (especially for the V8) are widely available, though pricing may vary depending on the market.

6. **Potential for Lower Purchase Price** Due to the camshaft issue, these vehicles may be sold at a discount, making them more affordable than comparable luxury SUVs without mechanical concerns.

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1. **Left Cylinder Head Camshaft Wear (Known Issue)**

- **Symptoms:** Rough idle, misfires, check engine lights (P0300 P0305 codes), reduced power, and potential long-term engine damage if ignored.

- **Cause:** The left cylinder head s camshaft bearings wear prematurely due to design flaws or insufficient lubrication, leading to excessive noise and potential failure.

- **Repair Cost:** Replacing the left camshaft assembly (or full cylinder head rebuild) can cost **$2,500 $4,500 **, depending on labor rates and whether additional components (valves, seals, etc.) need replacement.

- **Prevalence:** This issue is well-documented in the 2011 2015 QX56/QX80 (AY03111001) with the 5.6L V8. Infiniti issued a recall (NHTSA #14V-069) in 2014, but many affected vehicles were never repaired.

2. **Other Potential Issues**

- **Transmission Problems:** Some owners report rough shifting or failure in the 7-speed automatic transmission, though this is less common than the camshaft issue.

- **Electrical Gremlins:** Infiniti s early infotainment systems (especially pre-2013 models) can be finicky, with touchscreen or Bluetooth issues.

- **Rust Concerns:** If the vehicle has been driven in snowy or salted regions, rust in the wheel wells, undercarriage, or frame can be a long-term concern.

- **High Maintenance Costs:** Luxury SUVs often require more expensive parts and specialized labor compared to mainstream vehicles.

3. **Reliability Risks**

- The camshaft issue alone may not be fatal, but ignoring it can lead to catastrophic engine failure (e.g., valve train damage, piston damage).

- Without a service history proving the camshafts have been addressed, the risk of future problems remains high.

4. **Depreciation** Luxury SUVs lose value quickly, and a known mechanical issue further reduces their appeal to future buyers.

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Buying a **2011 2015 Infiniti QX56/QX80 (AY03111001) with the 5.6L V8 and left cylinder head camshaft issues** can be a **high-risk, high-reward** decision. On one hand, the vehicle offers strong power, luxury, and potential long-term value if the camshaft problem is resolved. On the other, the **repair cost is significant**, and the issue is widespread, meaning many owners have already faced (or will face) the same problem.

- **Service records** confirming the camshafts have been inspected or replaced.

- **A pre-purchase inspection (PPI)** by a trusted mechanic specializing in Infiniti/Nissan V8s.

- **The seller s willingness to cover part or all of the repair cost** (some dealers may offer incentives for affected models).

- **Alternative financing options**, as the repair could strain your budget.

If the camshafts are **not yet addressed**, the repair should be factored into the purchase price otherwise, you risk owning a vehicle with a **ticking time bomb**. If the seller refuses to disclose the issue or won t assist with repairs, it s best to walk away.

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- **If you re a mechanically inclined buyer with savings for repairs**, this could be a **good deal** if the camshafts are fixed upfront.

- A **2016 QX60/QX80** (new cylinder head design, fewer issues).

- A **Lexus GX 570** (more reliable long-term, though less sporty).

- A **used Cadillac Escalade (2014 )** or **Volvo XC90** (if luxury and reliability are priorities).

- **If you find a QX56/QX80 with a verified camshaft repair**, it could be a **solid used luxury SUV** just ensure the rest of the vehicle (transmission, suspension, electrical) is in good shape.

**Final Verdict:** Only buy one of these vehicles if you re **absolutely certain the camshaft issue is resolved** and you re comfortable with the potential for other hidden problems. Otherwise, prioritize newer models or different brands with better long-term reliability.

Details:

Item shows marks on surface, See pictures. This item IS a genuine factory OEM Original Equipment Manufacturer automotive part.

part #: ay03111001 prices

• $339.99-$398.94

specifications cylinderheapar:

• for models: Qx80
• for makes: Infiniti
• for years: 2011-2015
• mpn: Ay03111001
• type: Cylinder Head Assembly
• oe/oem part number: Oem
• material: Aluminum

general cylinderheapar:

• Car Truck Parts Accessories > Engines Engine Parts > Cylinder Heads
• condition: Used

seller cylinderheapar:

• city: Fairview height, Illinois
• rating: 99.6%
• # reviews: 739

offer cylinderheapar:

• quantity: 1
• started: June 3, 2026
• availability: In Stock
• options: Ship-to-home
• sold: 0

shipping cylinderheapar:

• transit: 3-8 Days
• carrier: USPS
• service: USPS Ground Advantage
• class: Standard
• cost: $0.00
• type: Calculated

payments cylinderheapar:

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

returns cylinderheapar:

• policy: No Returns

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