1. Cylinder Heads & Parts Engines Components For Sale
  2. sku: 11673266226092853
  3. GENESIS 306-59525BL

GENESIS 306-59525BL Driver Left Cylinder Head 3.8L

fits year: 2015–2017.

306-59525bl Genesis Driver Left Cylinder Head Sedan 3.8l Fits 15-16 658504

( Brand: Genesis ), ( Part Type: Driver Cylinder Head ), ( Conditions Options: Lh Head 3.8 ), ( Genuine Oem: Yes ), ( Ipn: 306-59525bl ), ( Placement: Driver/left )

Review GENESIS Driver Left Cylinder Head Sedan 3.8l fits 2015–2017

The **Genesis G70 (3.8L) Driver s Side Cylinder Head Driver Side (Part Number: 306-59525BL)** is a precision-engineered component designed exclusively for the 3.8-liter V6 engine found in the 2015 and 2016 model years of the Genesis G70, a luxury sedan renowned for its blend of performance, refinement, and cutting-edge technology. This high-performance cylinder head is crafted from durable cast iron, ensuring optimal heat dissipation and structural integrity under the demanding conditions of high-speed driving, aggressive acceleration, and prolonged highway travel. The driver s side head features a meticulously machined combustion chamber, precisely calibrated valve seats, and an integrated intake manifold interface, all of which contribute to efficient airflow and optimal engine breathing. The head is equipped with a robust valve train system, including high-quality valve springs, retainers, and rocker arms, which work in tandem to minimize valve float and maximize engine responsiveness, particularly at higher RPM ranges. This component is engineered to meet or exceed the stringent emissions and performance standards set by modern automotive regulations, ensuring both environmental compliance and peak mechanical efficiency.

The design of the **306-59525BL** incorporates advanced cooling technologies, such as strategically placed coolant passages and a reinforced gasket surface, to prevent overheating and maintain consistent performance even during extended periods of heavy load operation. The cylinder head is also compatible with the G70 s fuel-injected direct injection system, allowing for precise fuel delivery and combustion optimization, which enhances fuel economy and reduces harmful emissions. For added durability, the head is treated with a protective coating to resist corrosion, oxidation, and wear, making it well-suited for vehicles operating in diverse climates, from coastal regions with high humidity to arid environments where salt and dust can accelerate component degradation. Whether installed in a brand-new G70 or as a replacement for a worn or damaged head, this part ensures reliable operation, smooth power delivery, and the luxury driving experience that Genesis is known for.

When replacing or upgrading the cylinder head in a 2015 or 2016 Genesis G70, this **306-59525BL** driver s side unit offers a seamless fit with the engine bay s existing architecture, including the intake manifold, exhaust manifold, and associated wiring harnesses. It is compatible with the vehicle s electronic engine control unit (ECU) and supports the factory-installed turbocharger (where applicable) or naturally aspirated configurations, depending on the specific trim level. The part is backed by Genesis commitment to quality assurance, ensuring that it meets the same rigorous standards as the original equipment manufacturer (OEM) components, if not exceeding them in terms of performance and longevity. For mechanics and enthusiasts alike, this cylinder head represents a critical upgrade or replacement option that preserves the engine s performance characteristics while extending its operational lifespan, making it an indispensable part for maintaining the G70 s legendary driving dynamics.

### **Pros and Cons of buying a Genesis G70 3.8L (2015-2016) Left Cylinder Head (Part # 306-59525BL)**

#### **Pros:**

1. **Direct OEM Fitment** This is a genuine Genesis (Hyundai) part, ensuring compatibility with the 3.8L V6 engine in the 2015-2016 G70. It will integrate seamlessly with the factory components, reducing the risk of installation issues.

2. **High-Quality Materials** Hyundai/Kia parts are generally manufactured to strict quality standards, meaning the cylinder head should be durable and resistant to common wear issues like warping or cracking.

3. **Warranty Coverage** Purchasing from an authorized dealer or Hyundai-approved supplier may include a warranty, providing peace of mind against defects in materials or workmanship.

4. **Prevents Engine Damage** A failing cylinder head can lead to catastrophic engine failure (e.g., blown head gasket, coolant leaks, or compression loss). Replacing it proactively can save thousands in repair costs.

5. **Maintains Resale Value** Keeping the engine in good condition helps preserve the G70 s value, especially since the 3.8L V6 is a reliable powerplant when properly maintained.

6. **Easier to Source Gaskets & Hardware** Since this is an OEM part, finding compatible gaskets, bolts, and seals is straightforward, reducing the risk of mismatched components.

7. **No Modification Needed** Unlike aftermarket parts, this cylinder head will not require machining or adjustments unless there are pre-existing issues (e.g., warping) that need correction.

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#### **Cons:**

1. **High Cost** OEM cylinder heads are expensive, often ranging between **$800 $1,500 ** depending on the source (new vs. refurbished, dealer vs. online). This is a significant upfront investment.

2. **Long Installation Time** Replacing a cylinder head requires disassembling the engine, removing the intake manifold, valves, and other components. This is a **multi-day labor-intensive job**, especially for inexperienced mechanics.

3. **Potential Hidden Issues** Even a new OEM part may have internal defects (e.g., casting flaws, poor sealing surfaces) that only become apparent after installation. Inspecting the part for cracks, warping, or machining inconsistencies is crucial.

4. **Specialized Tools Required** Proper installation demands tools like a **cylinder head compressor, torque wrench, valve spring compressor, and a head gasket kit**. Renting or purchasing these adds to the cost.

5. **Risk of Improper Installation** If not installed correctly (e.g., incorrect torque specs, improper sealing, or misaligned valves), it can lead to **leaks, poor compression, or even engine damage**. This job is best left to a **certified Hyundai/Kia technician**.

6. **Limited Availability** Unlike common parts, cylinder heads may not be stocked at every auto parts store. You may need to order it, which could delay repairs.

7. **Potential for Aftermarket Alternatives** While OEM is ideal, **high-quality aftermarket cylinder heads** (e.g., from **Fel-Pro, Fel-Pro Performance, or Hyundai-approved remanufacturers**) can be **20 30% cheaper** with similar reliability if sourced carefully.

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### **Conclusion:**

Buying the **Genesis G70 3.8L (2015-2016) OEM cylinder head (306-59525BL)** is the **most reliable and long-term solution** if you want a **direct replacement with full warranty coverage**. However, the **high cost, labor intensity, and risk of installation errors** make it a significant undertaking.

If the cylinder head is failing due to **normal wear, coolant leaks, or a blown head gasket**, this is the **best choice** to restore engine health. However, if the issue is **minor (e.g., a single leaking valve cover gasket or a cracked intake manifold)**, a less expensive repair may suffice.

For those on a tighter budget, **a remanufactured OEM cylinder head** (from a reputable shop like **Hyundai Remanufacturing Services**) can offer **similar reliability at a lower cost**. Always **inspect the part for defects** before purchasing and **use a professional mechanic** for installation.

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### **Final Recommendation:**

- **If you can afford it and need a full replacement** **Buy the OEM part (306-59525BL) from an authorized dealer or Hyundai-approved supplier.** Ensure the part is **new (not used/refurbished unless verified)** and **inspect it for warping or cracks** before installation.

- **If budget is a concern** **Consider a remanufactured OEM cylinder head** (check for **Hyundai s reman program** or trusted third-party remanufacturers like **Fel-Pro Performance**).

- **If the issue is minor (e.g., head gasket leak, intake manifold crack)** **Repair only the damaged component** (e.g., replace the head gasket or manifold) instead of the entire cylinder head.

- **Always have a professional install it** This is **not a DIY job** unless you have **extensive engine experience**. Improper installation can lead to **expensive engine damage**.

**Best choice for longevity and peace of mind:** **New OEM cylinder head professional installation.**

**Best cost-effective alternative:** **Remanufactured OEM cylinder head trusted mechanic.**

Details:

Engines and transmission come with a standard 90-day warranty. GENESIS 15-16 SD, 3.8L, L. Glen Flora, WI 54526.

part #: 306-59525bl price

  • $439.00

specifications cylinderheapar:

  • for years: 2015-2017
  • brand: Genesis
  • part type: Driver Cylinder Head
  • conditions options: Lh Head 3.8
  • genuine oem: Yes
  • ipn: 306-59525bl
  • placement: Driver/left

general cylinderheapar:

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

shipping cylinderheapar:

  • cost: $0.00
  • type: Fixed
  • service: Flat Rate Freight
  • class: Freight

returns cylinderheapar:

  • paid by: Buyer
  • policy: Returns Accepted
  • time: 60 Days

payments cylinderheapar:

  • credit card: Visa
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  • wallet: Apple-pay

offer cylinderheapar:

  • quantity: 1
  • options: Ship-to-home
  • sold: 0
  • started: March 5, 2026
  • availability: In Stock

seller cylinderheapar:

  • rating: 99.5%
  • city: Glen Flora, Wisconsin
  • # reviews: 15687
for years: 2015-2017, part type: driver cylinder head, conditions options: lh head 3.8, genuine oem: yes, placement: driver/left,
manufacturer: genesis, category: auto parts > car truck parts accessories > engines engine parts > cylinder heads, sku: 11673266226092853,
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1 offer $439.00 USD
  • Used. Offer #1 priced at $439.00 + $0.00 shipping estimate = $439.00* total. Glen Flora, WI 54526. GENESIS 15-16 Sdn, 3.8L, L.FREE SHIPPING

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