BMW 51717162123 Radiator Upper Deflector Shield Cover 1520

( Manufacturer Part Number: 51717162123 ), ( Type: Radiator Deflector Shield Cover ), ( Oe/oem Part Number: 7162123 / 7 162 123 / 7-162-123 ), ( Color: Black ), ( Placement On Vehicle: Front, Upper )

Review BMW Radiator Upper Deflector Shield Cover Oem #1520 fits E85 E86 Z4 2003–2008

The **BMW 51717162123 radiator upper deflector shield cover (part number 1520)** for the **E85 (Z4 1st generation, 2003 2008)** and **E86 (Z4 2nd generation, 2009 2016)** models is a precision-engineered component designed to enhance both the aerodynamic efficiency and structural integrity of your vehicle s front end. Crafted from high-quality, durable materials typically reinforced plastic or lightweight composite this deflector shield cover serves a dual purpose: it protects the radiator and surrounding components from debris, road grime, and minor impacts while also directing airflow to optimize cooling performance. Positioned directly above the radiator core, the shield cover helps reduce turbulence and air resistance, ensuring consistent thermal regulation under varying driving conditions, from high-speed cruising to stop-and-go city traffic. Its sleek, aerodynamic design integrates seamlessly with the vehicle s front bumper and grille, maintaining the Z4 s signature sporty yet refined aesthetic. For owners seeking to restore originality or upgrade their vehicle s front end, this part is a critical fitment, ensuring compatibility with the E85 s split grille (2003 2008) and the E86 s unified grille (2009 2016) configurations. Whether installed as part of a full radiator repair or a targeted restoration project, this shield cover is essential for preserving the Z4 s performance, reliability, and timeless design language.

### **Pros and Cons of Buying a BMW 5-Series (E85/E86) or Z4 Upper Radiator Deflector Shield Cover (Part Number: 1520)**

1. **Improved Aerodynamics and Cooling** The upper radiator deflector shield helps reduce drag and prevents airflow from lifting off the hood, ensuring better cooling for the engine and cabin. This is particularly useful for high-performance or heavily modified vehicles where overheating is a risk.

2. **Enhanced Durability** The deflector shield protects the radiator and surrounding components from debris, road grime, and minor impacts, reducing wear and tear over time.

3. **Better Engine Bay Organization** Some aftermarket versions include mounting brackets or additional features that help keep the engine bay cleaner and more structured.

4. **Potential Performance Boost** By maintaining optimal airflow, the deflector can contribute to slightly improved engine efficiency, especially in high-speed or aggressive driving conditions.

5. **Aesthetic Appeal** Depending on the model, some aftermarket deflectors offer a sleeker or more aggressive look, enhancing the vehicle s appearance.

6. **Compatibility with Modifications** If you ve added a cold air intake, larger radiator, or other under-hood modifications, the deflector helps optimize airflow for those upgrades.

7. **Easy Installation** Most deflector shields are designed for straightforward bolt-on installation, requiring minimal tools and expertise.

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1. **Potential for Airflow Restriction** While the deflector improves airflow over the hood, it may slightly disrupt airflow to the radiator itself if not properly fitted, leading to minor cooling inefficiencies in extreme conditions.

2. **Cost Considerations** Depending on whether you opt for an OEM replacement or an aftermarket version, prices can vary. Aftermarket parts may offer better features but could be more expensive than genuine BMW components.

3. **Installation Challenges** Some vehicles, especially those with aftermarket modifications, may require additional adjustments (e.g., wiring harnesses, sensors, or brackets) to ensure the deflector fits correctly without interfering with other components.

4. **Quality Variability** Lower-quality aftermarket deflectors may not be as durable as OEM parts and could warp or crack over time, especially in high-heat environments.

5. **Potential for Overheating in Extreme Conditions** In very hot climates or during prolonged high-load driving, an improperly installed deflector could contribute to slightly higher engine bay temperatures if airflow to the radiator is compromised.

6. **Compatibility Issues** Some aftermarket deflectors may not fit perfectly on older or heavily modified vehicles, requiring customization or additional parts to ensure a proper seal and function.

7. **Maintenance Overhead** The deflector may accumulate dirt or debris over time, requiring occasional cleaning to maintain optimal airflow and cooling efficiency.

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The upper radiator deflector shield cover (part number 1520) is a beneficial upgrade for BMW E85/E86 5-Series or Z4 owners, particularly those who prioritize aerodynamics, cooling efficiency, and engine bay protection. While it offers clear advantages in terms of performance and durability, potential drawbacks such as minor airflow restrictions or installation complexities should be carefully considered. If you re modifying your vehicle or driving in demanding conditions, the benefits often outweigh the cons. However, if you re looking for a simple, no-frills replacement, an OEM or high-quality aftermarket part is the best choice.

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- **For OEM Replacement:** If you prefer authenticity and reliability, opt for a genuine BMW part (1520) from a trusted dealer or online retailer. Ensure it matches your vehicle s exact specifications to avoid compatibility issues.

- **For Aftermarket Upgrades:** If you re open to aftermarket options, choose a reputable brand known for high-quality materials and precise engineering (e.g., BMS, Eibach, or other performance-focused manufacturers). Look for deflectors with reinforced mounting points and good customer reviews.

- **Installation:** If you re not experienced with under-hood modifications, have a professional install the deflector to ensure proper alignment and functionality. Pay special attention to airflow paths and clearance with other components.

- **Maintenance:** Regularly inspect the deflector for damage or debris buildup, and clean it as needed to maintain optimal performance.

Ultimately, the deflector is a worthwhile investment for most BMW enthusiasts, especially those who drive aggressively or have modified their vehicles. Prioritize quality and fitment to maximize its benefits.

Details:

No other parts are included unless pictured. Review photos carefully for condition. Please match all part numbers and photos with your original to ensure proper fitment. Good condition.

Removed from good running 2003 BMW Z4 2.5L 5 Speed Manual Transmission.

part #: 51717162123 prices

• $74.95-$112.05

specifications cartrimmouldings:

• for models: E85, E86, Z4
• for makes: Bmw
• for years: 2003-2008
• mpn: 51717162123
• type: Radiator Deflector Shield Cover
• oe/oem part number: 7162123 / 7 162 123 / 7-162-123
• color: Black
• placement on vehicle: Front, Upper

payments cartrimmouldings:

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

offer cartrimmouldings:

• options: Ship-to-home
• availability: In Stock
• quantity: 1
• started: May 8, 2026
• sold: 0

general cartrimmouldings:

• condition: Used
• Car Truck Parts Accessories > Exterior Parts Accessories > Body Moldings Trims

seller cartrimmouldings:

• rating: 100.0%
• city: Vancouver, Washington
• # reviews: 1917

shipping cartrimmouldings:

• carrier: FedEx
• class: Standard
• transit: 5-11 Days
• service: FedEx Ground / FedEx Home Delivery
• type: Fixed
• cost: $23.95

returns cartrimmouldings:

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

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