ACURA 10004R9PA00 Left Front Cylinder Head 306-59600 3.5L

( Manufacturer Part Number: 10004R9PA00 ), ( Items Included: One Broken Solenoid ), ( Vintage Part: No ), ( Interchange: 306-59600d ), ( Type: Cylinder Head Assembly ), ( Ipn: 306-59600 ), ( Manufacturer Warranty: 1 Month ), ( Id: 15f3faba-e949-4b7a-b262-538088a5fc9c ), ( Country Of Origin: Japan )

Review ACURA 3.5l Left Front Cylinder Head Oem fits TLX 2015–2020

The **Acura 10004R9PA00** is a high-performance, precision-engineered cylinder head designed exclusively for the **2015 2020 Acura TLX (3.5L V6)** with the **Type R engine**, ensuring optimal performance, reliability, and longevity for this sport-tuned powertrain. Crafted from **high-grade cast aluminum** with a **sand-cast finish**, this cylinder head is engineered to deliver superior heat dissipation, structural integrity, and efficiency, making it a critical component for maintaining peak engine performance. The head features a **dual overhead camshaft (DOHC) design** with **four valves per cylinder (2 intake, 2 exhaust)**, allowing for precise airflow control and enhanced combustion efficiency, which is essential for the TLX s sporty driving dynamics. The **intake ports** are generously sized to maximize airflow into the combustion chambers, while the **exhaust ports** are optimized for optimal scavenging, reducing backpressure and improving exhaust gas flow. The head is equipped with **hydraulic valve lifters** for smooth operation and minimal wear, ensuring consistent valve lash and reducing the risk of mechanical stress on the camshafts. Additionally, the **valve guides and seats** are precision-machined to accommodate the **stainless steel valves** used in the Type R engine, providing durability against high-temperature corrosion and wear. The **spark plug bores** are precisely drilled to ensure proper alignment and sealing with the spark plugs, contributing to reliable ignition and consistent combustion. This cylinder head is fully compatible with the **Acura TLX s fuel injection system**, including the **multi-point fuel injection (MPI)** setup, allowing for precise fuel delivery and optimal air-fuel ratios. Whether used in a **restoration project, performance upgrade, or replacement due to wear**, the **10004R9PA00** is a meticulously crafted component that upholds the TLX s reputation for refined yet aggressive performance. Built to meet **OEM specifications**, it ensures a seamless fit with the engine block, intake manifold, and exhaust system, making it an ideal choice for enthusiasts seeking both reliability and high-performance capabilities.

### **Pros and Cons of Buying a Used Acura TLX (2015-2020) with a Replaced Left Front Cylinder Head (Part Number: 10004R9PA00, 3.5L Engine)**

#### **Pros of Purchasing This Vehicle**

1. **Reliable 3.5L V6 Engine**

- The 3.5L J35 engine in the TLX is a well-regarded powertrain known for durability, especially when properly maintained. With a cylinder head replacement, the engine has likely been addressed for potential issues like warping, leaks, or internal wear.

2. **Proven Aftermarket Support**

- The J35 engine has a strong aftermarket presence, meaning parts (including cylinder heads, gaskets, and sensors) are widely available. This makes repairs and maintenance more accessible than on some less common engines.

3. **Potential for Long-Term Reliability**

- If the cylinder head replacement was done correctly (with proper sealing, torque specs, and quality gaskets), the engine should run smoothly without immediate issues. Many J35 engines last well beyond 200,000 miles with basic maintenance.

4. **Good Driving Dynamics**

- The TLX offers a comfortable, well-balanced ride with responsive handling, especially in the 3.5L V6 trim. The AWD option (if present) provides better traction in adverse conditions.

5. **Acura s Reputation for Build Quality**

- Acura vehicles are generally built to higher standards than many domestic brands, with solid interior materials and refined engineering. The TLX, in particular, has a premium feel compared to some competitors.

6. **Cost-Effective for a Premium SUV**

- Compared to luxury brands like Lexus or BMW, the TLX offers a more affordable entry into the premium SUV market without sacrificing too much in terms of comfort or features.

7. **Resale Value**

- Acura holds its resale value relatively well, especially for well-maintained models. A properly serviced TLX with a fresh cylinder head could retain value better than a neglected vehicle with unknown engine issues.

8. **Availability of Replacement Parts**

- Since the cylinder head is a common failure point in some J35 engines, the fact that it has been replaced suggests the seller has addressed a known weakness. This reduces the risk of sudden engine failure.

---

#### **Cons of Purchasing This Vehicle**

1. **Potential Hidden Engine Issues**

- While the cylinder head has been replaced, other engine components (valves, camshafts, oil pump, or timing chain) could still be worn or failing. A thorough inspection (including compression test, leak-down test, and oil analysis) is essential to confirm the engine s health.

2. **Cost of the Cylinder Head Replacement**

- Replacing a cylinder head on a J35 engine typically costs between **$1,500 and $3,000** (parts and labor). If the seller hasn t provided records or receipts, there s no guarantee the work was done correctly or that the engine is fully restored.

3. **Possible Transmission Concerns**

- The TLX s 9-speed automatic transmission (in later models) can be finicky and may require frequent fluid changes. Some owners report transmission hesitation or rough shifts, which could add unexpected repair costs.

4. **Electrical or Sensor Failures**

- Acura vehicles, like many modern cars, rely heavily on sensors and electronics. Common issues include faulty mass airflow sensors, oxygen sensors, or turbocharger wastegate sensors (if equipped with a turbo). These can lead to check engine lights and reduced performance.

5. **Rust and Structural Concerns**

- Depending on the region where the vehicle was driven, rust in the wheel wells, subframe, or suspension components could be an issue. A thorough inspection of the undercarriage is necessary.

6. **Depreciation and Market Saturation**

- The TLX is a popular used vehicle, meaning competition in the market can drive prices up. You may need to pay more than you d like for a vehicle with unknown maintenance history.

7. **Potential for AWD-Specific Issues**

- If the vehicle is AWD, the transfer case and differentials require extra attention. AWD systems can be more complex and expensive to repair than FWD models.

8. **Maintenance Costs Over Time**

- While the J35 engine is durable, it does require regular maintenance (timing belt/replacement every 105,000 miles, spark plugs, oil changes, etc.). Neglecting these can lead to costly failures.

9. **Resale Value Depends on Condition**

- If the vehicle has been poorly maintained or has a history of neglect, its resale value will suffer. A fresh cylinder head helps, but other factors (mileage, accident history, service records) matter just as much.

10. **Turbocharger Risks (If Equipped)**

- Some 2016-2020 TLX models come with a turbocharged version of the J35 engine. Turbochargers are more prone to failure (exhaust leaks, wastegate issues, or turbo spool problems) and can be expensive to repair.

---

### **Conclusion and Recommendation**

Buying a **2015-2020 Acura TLX with a replaced left front cylinder head (10004R9PA00)** can be a **good investment** if approached with caution. The cylinder head replacement is a **positive sign**, as it indicates the seller has addressed a known weakness in the J35 engine. However, **this is not a "fix-all" solution** other engine components, transmission health, and overall vehicle condition must be thoroughly inspected.

1. **Verify the Cylinder Head Replacement**

- Ask for **service records** proving the head was replaced by a reputable shop. Ensure the work was done with **OEM or high-quality gaskets** and proper torque specs.

- Check for **leaks** around the head gasket area (oil, coolant, or vacuum leaks).

2. **Run Diagnostic Tests**

- A **compression test** and **leak-down test** should confirm the engine is sealing properly.

- A **scan tool** should show no active or pending codes (especially related to the cylinder head or turbo, if equipped).

3. **Inspect the Transmission**

- Check for **smooth shifting**, no hesitation, or unusual noises. A **fluid analysis** can reveal if the transmission has been neglected.

4. **Check for Rust and Structural Damage**

- Inspect the **wheel wells, subframe, and suspension** for rust or corrosion. A **lift inspection** (if possible) is ideal.

5. **Test Drive and Listen for Issues**

- Pay attention to **engine noise, turbo spool-up (if applicable), and transmission behavior**.

- Test **AWD engagement** (if equipped) to ensure it switches smoothly.

6. **Consider a Pre-Purchase Inspection (PPI)**

- A **mechanic or Acura dealership** should perform a **detailed inspection** for **$150-$300**. This is a small price to pay to avoid a **$3,000 engine repair** later.

7. **Negotiate Based on Findings**

- If the inspection reveals **minor issues**, use them to negotiate a **lower price**. If major problems are found, reconsider the purchase.

---

**Proceed with caution but confidence.**

- **If the vehicle has clean service records, a properly documented cylinder head replacement, and passes all inspections, it can be a reliable buy.**

- **If the seller cannot provide maintenance history or the inspection reveals hidden issues, walk away or negotiate aggressively.**

- **Budget for potential future repairs** (transmission fluid changes, timing belt replacement, suspension work).

- **Consider a newer model (2021 ) if available**, as later TLX versions have minor refinements and improved reliability in some areas.

**Best Case:** A well-maintained TLX with a fresh cylinder head can be a **solid used SUV** with **low long-term risk**.

**Worst Case:** A neglected example with **hidden engine or transmission issues** could become a **money pit**.

**Final Verdict:** **Worth considering if thoroughly vetted, but not a "set-and-forget" purchase.** Always prioritize **transparency from the seller** and **professional verification** before buying.

Details:

Buyer will need to replace the transmission oil filter, put a new pan gasket on, flush and add manufacturer specific fluids. Most items are shipped the same-day as purchase. In some cases the Transmission Control Computer module is internal and incorporated with valve body, which may require body to be replaced. ACURA TLX 15-20 3.5L, LH front.

Quick shipping. Depending on the age of vehicle and other circumstances they will rust show signs corrosion. Some external sensors or solenoids may need to be replaced. Transmission lines will need flushed, along with the transmission oil cooler needs replaced if equipped, this to be done so contaminants from bad not ruin your replacement.

Block, Cylinder Heads, Timing Cover, Oil Pan, Flywheel. Axle seals, front and drive shaft seals will also need to be replaced. Search for more parts ACURA TLX. Transmissions must be shipped to a commercial address with dock and forklift or the closest shipping terminal.

Warranty period begins the day after delivery. Free shipping, if offered, applies only to commercial addresses with proper equipment dock and forklift unload. Picture in the listing may not be of actual item sold; it a stock picture only. Buyer pays return shipping if wrong color ordered.

Transfer cases will not be included with transmissions from 4x4 or All Wheel Drive vehicles. Engines must be shipped to a commercial address with dock and forklift or the closest shipping terminal.

part #: 10004r9pa00 prices

• $239.99-$1041.10

specifications cylinderheapar:

• for models: Tlx
• for makes: Acura
• for years: 2015-2020
• mpn: 10004r9pa00
• items included: One Broken Solenoid
• vintage part: No
• interchange: 306-59600d
• type: Cylinder Head Assembly
• ipn: 306-59600
• manufacturer warranty: 1 Month
• id: 15f3faba-e949-4b7a-b262-538088a5fc9c
• country of origin: Japan

returns cylinderheapar:

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

seller cylinderheapar:

• rating: 99.6%
• # reviews: 24890
• city: Erie, Pennsylvania

payments cylinderheapar:

• wallet: Paypal
• credit card: Mastercard
• other

offer cylinderheapar:

• options: Ship-to-home
• quantity: 1
• best offers: True
• availability: In Stock
• started: April 2, 2026
• sold: 0

general cylinderheapar:

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

shipping cylinderheapar:

• type: Fixed
• cost: $0.00
• service: Standard
• transit: 2-6 Days
• class: Standard

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