MASERATI 306.MA1X07 Driver Left Cylinder Head Quattropo M139 4.2L V8

( Model: QUATTROPO ), ( Conditions Options: Sedan, Natasp ), ( Genuine Oem: Yes ), ( Ipn: 306.ma1x07 ), ( Year: 2007 ), ( Manufacturer Warranty: 60 Day ), ( Type: Cylinder Head )

Review MASERATI Driver Left Cylinder Head 4.2l V8 Cyl fits QUATTROPORTE 2003–2008

The **Maserati 306.ma1x07 Quattroporte M139 Driver-Side Cylinder Head (4.2L V8, 2003 2008)** is a meticulously engineered component designed to deliver the unmistakable blend of Italian craftsmanship and high-performance reliability that Maserati is renowned for. This cylinder head, integral to the iconic 4.2-liter V8 engine (designated M139), embodies the precision and power that define the Quattroporte s legendary driving experience. Crafted from high-grade aluminum alloy, the head is engineered to optimize airflow and combustion efficiency, ensuring peak performance while maintaining the engine s signature balance of torque and responsiveness. The design incorporates dual overhead camshafts (DOHC) per bank, each driving four valves per cylinder two intake and two exhaust via rocker arms, allowing for a high-lift, high-flow configuration that maximizes horsepower and smoothness. The valve train is supported by robust hydraulic lifters, eliminating the need for manual adjustment and ensuring consistent performance under demanding conditions. The head features a sophisticated intake manifold system, often paired with the engine s signature throttle body and fuel injection setup, to deliver a precise and dynamic air-fuel mixture. Additionally, the exhaust ports are meticulously contoured to enhance scavenging, reducing backpressure and further boosting engine output. This cylinder head is a critical component in the M139 s ability to produce around **400 horsepower and 300 lb-ft of torque**, making it a cornerstone of the Quattroporte s exhilarating acceleration and spirited handling. Whether restoring a classic model or upgrading an existing engine, this part ensures that every rev of the 4.2L V8 resonates with the refined power and elegance that Maserati enthusiasts demand. Built to exacting standards, it represents the pinnacle of automotive engineering a testament to the brand s legacy of luxury, performance, and uncompromising quality.

### **Pros and Cons of Buying a Maserati Quattroporte (M139, 4.2L V8, 2003 2008, Left-Hand Drive, Driver-Side Cylinder Head Issue)**

#### **Pros**

1. **Luxury and Prestige**

The Maserati Quattroporte is an iconic Italian grand tourer known for its refined interior, handcrafted details, and timeless design. Owning one carries significant prestige, appealing to enthusiasts who value exclusivity and craftsmanship.

2. **Strong Engine and Performance**

The 4.2L V8 (M139) is a robust powerplant capable of producing around **370 400 hp** (depending on tuning and modifications). It delivers a smooth, linear power delivery with a deep, resonant exhaust note. The manual transmission (if available) enhances engagement, while the automatic offers smooth shifts.

3. **Classic Grand Tourer Comfort**

The Quattroporte is built for long-distance cruising with a plush, well-suspended ride. The interior features high-quality materials (leather, wood trim, aluminum accents), ergonomic seating, and a spacious cabin, making it comfortable for both daily use and weekend drives.

4. **Timeless Design**

The M139 generation (2003 2008) retains the classic Maserati aesthetic with sharp lines, a long hood, and a commanding presence. Its design hasn t dated as poorly as some contemporaries, making it visually appealing even today.

5. **Potential for Modifications**

The V8 platform is well-supported by aftermarket tuners (e.g., **Maserati Performance, SuperSpeed, or custom engine builders**). Upgrades like **turbocharging, cylinder head work, or exhaust tuning** can significantly boost power while maintaining reliability if done correctly.

6. **Resale Value (For Well-Maintained Examples)**

While not as strong as a Ferrari or Lamborghini, a **low-mileage, well-documented Quattroporte** (especially with a clean title) retains decent value. Restored examples can appreciate over time, particularly if demand for classic Maseratis grows.

7. **Driving Dynamics**

The Quattroporte handles well for its size, with a **rear-wheel-drive layout, stiff suspension, and precise steering**. While not as nimble as a sports car, it offers engaging cornering and a balanced driving experience, especially with minor suspension tuning.

8. **Italian Engineering Legacy**

Maserati s engineering heritage is evident in the build quality, attention to detail, and mechanical sophistication. The M139 engine, though not as advanced as modern units, is a well-proven powerplant with a loyal following.

---

#### **Cons**

1. **Driver-Side Cylinder Head Issue (M139-Specific)**

The **most critical concern** with this engine is the **driver-side cylinder head**, which is prone to **warping, cracking, or failure** due to poor cooling and stress. Symptoms include:

- **Misfires** (especially on startup or under load)

- **White smoke from the exhaust** (indicating coolant entering the combustion chamber)

- **Overheating** (due to restricted coolant flow)

- **Engine knocking or ticking** (from improper valve timing)

- **Oil leaks** (from cracked head gaskets or cracked heads)

- **Blown head gaskets** (leading to coolant in oil or oil in coolant)

- **Seized valves or bent pushrods** (in severe cases)

- **Replacing the driver-side cylinder head** can cost **$3,000 $6,000 ** (labor-intensive, requires special tools).

- **Full engine rebuild** (if the block is damaged) can exceed **$10,000 $15,000**.

- **Preventative measures** (like **head cooling modifications, upgraded water pump, or thermostat upgrades**) can help but don t guarantee long-term reliability.

**This is the #1 reason many buyers avoid this engine.**

2. **High Maintenance Costs**

- **Transmission (ZF 5HP24A automatic)** Prone to **slippage, delayed shifts, or solenoid failures** (rebuilds cost **$3,000 $5,000**).

- **Suspension (air suspension on later models)** Leaks, compressor failures, or electrical gremlins.

- **Electrical system** Maseratis are notorious for **faulty sensors, wiring issues, and infotainment glitches**.

- **Brakes** Carbon-ceramic or high-performance rotors wear out quickly and are costly to replace.

- **Exhaust & emissions** Catalytic converters and oxygen sensors fail frequently, requiring **$500 $1,500 per converter**.

3. **Reliability Concerns**

- **Rod bearing wear** (if oil changes are skipped).

- **Water pump failure** (leading to overheating).

- **Timing chain stretch** (can cause valve train issues).

- **Fuel system issues** (injectors clogging, fuel pump failures).

- **Clutch (if manual)** Expensive to replace ( $3,000 $4,000).

4. **Fuel Economy & Running Costs**

- **MPG is poor** ( 12 15 city, 16 18 highway).

- **High-performance tires, premium fuel, and frequent maintenance** add up.

- **Insurance is expensive** (luxury sports sedans are costly to insure).

5. **Depreciation & Market Saturation**

- The Quattroporte has **high depreciation** compared to its value.

- Many examples are **poorly maintained**, leading to a flooded market with **cheap, unreliable options**.

- **Restored examples command a premium**, but finding one with **full service records is rare**.

6. **Driving Experience Limitations**

- **Not a performance machine** 0 60 mph in **5.5 6.5 seconds** (stock) is decent but not exciting.

- **Rear-wheel bias** can make it **understeer-heavy**, requiring driver adjustment.

- **Manual transmission is rare** (most are automatics), which some purists dislike.

7. **Parts Availability & Scarcity**

- **Original parts are expensive and hard to find** (especially for older models).

- **Aftermarket support exists but is inconsistent** (some components may not fit perfectly).

- **Replica parts (from China) are cheap but often low-quality**.

8. **Potential for Hidden Damage**

- **Accident history** (even minor) can lead to **structural rust, frame damage, or suspension issues**.

- **Salvage titles or flood damage** are common in this market **always verify history**.

- **Electrical fires** (from wiring or battery issues) have been reported in some examples.

---

### **Ending Conclusion & Recommendation**

#### **Who Should Buy This Car?**

- You **prioritize luxury, comfort, and prestige** over raw performance.

- You are **prepared for high maintenance costs** and have **budgeted for the cylinder head repair** (or plan to modify it proactively).

- You **enjoy classic Italian grand tourers** and don t mind occasional mechanical quirks.

- You **find a well-documented, low-mileage example** (under **80,000 miles**) with **full service records**.

- You are **willing to invest in restomod projects** (engine upgrades, suspension tuning, interior refresh).

- You **have experience with high-end European cars** and understand their quirks.

#### **Who Should Avoid This Car?**

- You **cannot afford the cylinder head repair** (or any major engine work).

- You **expect a reliable, low-maintenance luxury car** this is **not a plug-and-chug machine**.

- You **don t have access to a Maserati specialist** for repairs.

- You **find a car with a history of neglect** (check for **overheating, misfires, or oil leaks**).

- You **prefer modern tech** the infotainment and electronics are **outdated and finicky**.

- You **don t enjoy mechanical projects** this car **requires constant attention**.

#### **Final Recommendation**

If you **find a pristine example** (under **60,000 miles**, with **full service records**, and **no cylinder head issues**), it can be a **fantastic investment** both as a **daily driver** and a **collector s item**. However, **budget at least $10,000 $15,000 for repairs**

Details:

These extra attached parts are not covered by any warranty. Donor Vehicle: model: QUATTROPO. Many electronic modules and components require programming. Stock #: 259404.

Video: Go to YouTube and search for: Playground PAR 259404 Part Detail: Placement. Warranty covers the base component and none of other attached parts. Parts are not covered for external fluid leaks. Major components are stamped and may have heat sensitive tabs attached to indicated overheating that would void warranty.

Miles: 59000 - N/A or Unknown. Maserati Quattroporte M139 Driver Left Cylinder Head 4.2L V8 8 Cyl Fits 03-08: Review photos this is your actual part.

part #: quattropo prices

• $142.37-$275.79

specifications cylinderheapar:

• for models: Quattroporte
• for makes: Maserati
• for years: 2003-2008
• model: Quattropo
• conditions options: Sedan, Natasp
• genuine oem: Yes
• ipn: 306.ma1x07
• year: 2007
• manufacturer warranty: 60 Day
• type: Cylinder Head

shipping cylinderheapar:

• cost: $49.99
• class: Economy
• transit: 3-5 Days
• service: Economy
• type: Fixed

general cylinderheapar:

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

payments cylinderheapar:

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

returns cylinderheapar:

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

seller cylinderheapar:

• city: Port Washington, Wisconsin
• # reviews: 11056
• rating: 99.4%

offer cylinderheapar:

• best offers: True
• sold: 0
• started: March 17, 2026
• quantity: 1
• options: Ship-to-home
• availability: In Stock

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