BMW 337-30190 Throttle Body Ylysw

( Part Type: Throttle ), ( Ipn: 337-30190 ), ( Fitment Type: Direct Replacement ), ( Modified Item: No ), ( Manufacturer Warranty: Unspecified Length )

Review BMW Throttle Body Yly fits X5 2009

The **BMW 337-30190 2009 X5 Throttle Body (YLYSW)** is a precision-engineered component designed to optimize airflow and performance within the N54 twin-turbocharged inline-six engine found in the 2009 BMW X5 models. This throttle body is part of the **YLYSW** variant, which corresponds to the **N54B30** engine configuration, delivering a balance of power and efficiency for both daily driving and spirited acceleration. Crafted from high-quality materials, the throttle body features a **dual-vane design** that allows for precise control over throttle response, ensuring smooth and progressive power delivery while minimizing turbo lag. The internal components, including the **throttle blades, actuator motor, and position sensors**, are built to withstand the demands of high-performance applications, offering durability and reliability even under aggressive driving conditions. This throttle body is compatible with both **stock and aftermarket tuning setups**, making it an ideal choice for enthusiasts looking to enhance throttle response, reduce turbo spool time, or integrate with performance-oriented modifications. Its sleek, aerodynamic housing not only contributes to the engine bay s aesthetic but also ensures efficient airflow, reducing backpressure and improving overall engine efficiency. Whether used in a stock configuration or as part of a more extensive performance upgrade, this throttle body exemplifies BMW s commitment to engineering excellence, delivering both functionality and performance in a compact, high-tech package.

### **Pros and Cons of Buying a 2009 BMW X5 (337i, 30190, YLYSW) with a Throttle Body Issue**

#### **Pros**

1. **Strong Engine and Performance**

The 2009 BMW X5 337i is powered by a **3.0L inline-6 twin-turbo engine (N57)**, which delivers strong performance around **300 horsepower and 300 lb-ft of torque**. This engine is capable of handling daily driving and occasional spirited acceleration, especially with proper maintenance.

2. **Comfortable and Spacious Interior**

The X5 is known for its **luxurious cabin**, offering ample legroom, a high-quality infotainment system (with optional navigation), and premium materials. The seating is comfortable for long drives, and the ride quality is smooth, though it can be slightly soft compared to sportier SUVs.

3. **Reliability of the N57 Engine (With Proper Care)**

While the N57 has some known issues, it is generally **reliable if maintained correctly**. Regular oil changes (using high-quality synthetic oil, such as **BMW LL-04 or 5W-30**), timely valve cover gasket replacements, and keeping the turbochargers in good condition can extend its lifespan significantly.

4. **Good Resale Value**

BMW X5s hold their value relatively well compared to some competitors, especially in the luxury SUV segment. A well-maintained 2009 model can still fetch a decent price in the used market.

5. **Available Safety and Luxury Features**

The 2009 X5 comes with **standard features like stability control, multiple airbags, and a rearview camera (optional)**. Higher trims (like the **xDrive35i or M Sport**) include additional luxury and tech upgrades, such as **leather seats, heated/ventilated seats, and a premium sound system**.

6. **Potential for Modifications**

If you enjoy tuning, the N57 platform has a **strong aftermarket support**, allowing for upgrades like **turbocharger swaps, exhaust modifications, and ECU tuning** to improve performance.

7. **Durable Drivetrain Options**

The **xDrive system** (available in higher trims) provides **all-wheel drive capability**, which is beneficial for adverse weather conditions. The **6-speed automatic transmission** is generally smooth, though some owners report minor delays in shifting.

---

#### **Cons**

1. **Throttle Body Issue (YLYSW Code)**

- **Rough idle or stalling**

- **Check Engine Light (CEL) with codes like YLYSW (throttle position sensor circuit malfunction)**

- **Poor acceleration or hesitation**

- **Unresponsive throttle pedal**

The throttle body can **stick, develop carbon buildup, or fail entirely**, leading to drivability issues. **Replacement or cleaning is often required**, which can cost **$300 $800** depending on labor and parts.

2. **Oil Consumption and Valve Cover Gasket Leaks**

The N57 engine is notorious for **burning oil**, especially in higher-mileage examples. Some owners report **1 quart or more per 1,000 miles**, which can lead to **engine damage if ignored**. Additionally, **valve cover gaskets often leak**, requiring frequent replacements (every **50,000 100,000 miles**).

3. **Turbocharger and Oil System Reliability**

The **turbochargers** in the N57 can wear out prematurely, especially if oil changes are neglected. **Oil leaks from the oil filter housing gasket** are also common, leading to **low oil pressure and potential engine damage**. Replacing the **oil filter housing gasket and upgrading to a high-flow oil filter** is recommended.

4. **Transmission Issues (6HP26Z)**

Some owners report **rough shifting, delayed engagement, or even complete transmission failure** in the **6-speed automatic**. While not as common as engine issues, it s worth checking the service history for **transmission fluid changes** (should be done every **60,000 miles**).

5. **Electrical and Infotainment Glitches**

The **iDrive system** (especially in older models) can be **slow, unresponsive, or prone to freezing**. Bluetooth connectivity and **USB port issues** are also reported. Some owners have had to **reflash the software** or replace components.

6. **Higher Maintenance Costs**

- **Spark plugs** ( $500 $800)

- **Coil packs** ( $300 $600 each)

- **Oxygen sensors** ( $200 $400 each)

- **Water pump and thermostat** ( $500 $800)

can add up quickly.

7. **Depreciation and Long-Term Costs**

While the X5 retains value, **BMW s resale depreciation is steep**. If you plan to keep the car long-term, **budget for potential major repairs** (e.g., **engine rebuild, transmission replacement, or suspension work**).

8. **Suspension and Steering Wear**

The **shock absorbers, bushings, and control arms** wear out over time, leading to **rough rides and poor handling**. Replacing the **front and rear suspension** can cost **$1,500 $3,000**.

---

### **Conclusion**

The **2009 BMW X5 337i (30190, YLYSW throttle body issue)** is a **capable and comfortable luxury SUV**, but it comes with **significant maintenance concerns**, particularly around the **N57 engine s oil consumption, turbochargers, and throttle body**. If you are **willing to invest time and money in upkeep**, this car can be a **great daily driver with strong performance**. However, if you **prioritize low maintenance and long-term reliability**, there may be better alternatives.

### **Recommendation**

- **Get a pre-purchase inspection (PPI) from a BMW specialist** to confirm the extent of the throttle body issue and check for other hidden problems.

- **Verify maintenance records**, especially for **oil changes, valve cover gaskets, and turbo inspections**.

- **Budget for immediate fixes** (throttle body replacement/cleaning, oil system upgrades, and potential valve cover gasket replacement).

- **Consider a short-term lease or test drive** to ensure the car meets your expectations before committing.

- **Be prepared for higher long-term costs** this is not a "set-and-forget" vehicle.

- **Look for a newer N57 model (2010 2013) with more refined reliability improvements** (though later models still have oil consumption issues).

- **Mercedes-Benz ML350 (M271 engine)** More reliable but less powerful.

- **Audi Q5 3.0 TDI** Diesel option with better longevity if maintained.

- **Lexus RX 350** More reliable but less sporty.

- **If you love BMWs but want something newer**, look at a **2015 X5 with the N55 (naturally aspirated) or B58 (turbo) engine**, though these also have their quirks.

### **Final Verdict**

The **2009 BMW X5 337i with a throttle body issue can be a rewarding purchase for an experienced BMW owner who is prepared for maintenance**, but it is **not the best choice for someone seeking a hassle-free luxury SUV**. If you **inspect it thoroughly, address the throttle body issue immediately, and stay on top of maintenance**, it can be a **fun and capable vehicle**. Otherwise, consider a **more reliable alternative** or a **newer BMW model** with updated reliability fixes.

Details:

Shipping is via USPS or UPS. This 2009 Bmw X5 Throttle Body is in overall good condition. Most electronic parts are not plug and play. Compatible with.

Please also use the pictures to ensure a proper fit.

specifications throobo:

• for models: X5
• for makes: Bmw
• for years: 2009
• part type: Throttle
• ipn: 337-30190
• fitment type: Direct Replacement
• modified item: No
• manufacturer warranty: Unspecified Length

offer throobo:

• started: March 22, 2026
• quantity: 1
• availability: In Stock
• options: Ship-to-home
• sold: 0

shipping throobo:

• type: Fixed
• class: Expedited
• service: Expedited
• cost: $0.00
• transit: 3-6 Days

seller throobo:

• city: Las Vegas, Nevada
• # reviews: 80895
• rating: 99.2%

returns throobo:

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

payments throobo:

• wallet: Paypal
• credit card: Diners-club
• other

general throobo:

• condition: Used
• Car Truck Parts Accessories > Air Fuel Delivery > Throttle Bodies

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