BMW 51-13-7-497-208 Air Flaps Upper

( Manufacturer Part Number: 51-13-7-497-208 ), ( Part Type: Flap ), ( Genuine Oem: Yes ), ( Manufacturer Warranty: 1 Year ), ( Universal Fitment: Direct Replacement ), ( Parts Included: Only Part Reference 0 On The Diagram Is Included ), ( Replaces Part Number: 51137473506 )

Review BMW Genuine Air Flaps Upper

The **BMW 51-13-7-497-208 Air Flaps Upper** is a precision-engineered component designed specifically for the BMW 5 Series (E39) air intake system, serving as a critical part of the vehicle s engine bay ventilation and cooling mechanism. Crafted from high-quality, durable materials, this upper air flap is engineered to ensure optimal airflow regulation while maintaining structural integrity under the demanding conditions of high-performance driving. Its sleek, aerodynamic design integrates seamlessly with the surrounding components, contributing to both the vehicle s functional efficiency and aesthetic appeal. The flap operates within the air intake manifold, working in tandem with the lower air flap (part number 51-13-7-496-208) to control the intake of air into the engine, thereby influencing throttle response, fuel efficiency, and overall engine performance. Constructed with meticulous attention to detail, this component features precise cutouts and mounting points to guarantee a snug fit, minimizing air leaks and maximizing airflow precision. Whether used in original equipment applications or as a high-quality replacement for maintenance or restoration projects, this air flap exemplifies BMW s commitment to engineering excellence, ensuring reliable operation and longevity in even the most rigorous driving conditions.

### **Pros and Cons of Buying a BMW 5 Series (F10/F11/F12/F13) with the "Air Flaps Upper" (Part Number: 51 13 7 497 208) A Rear Spoiler/Clamshell Spoiler**

This part refers to the **upper rear clamshell spoiler** (also called the "air flap" or "active spoiler") found on BMW 5 Series models (F10 F13) with the **M Sport or M Performance Package** or certain high-end trims. Below is a detailed analysis of its pros, cons, and a final recommendation.

---

### **Pros of Installing or Retaining the Upper Rear Spoiler**

1. **Aerodynamic Efficiency and Stability**

- The clamshell spoiler helps reduce lift at high speeds, improving stability and handling, especially on highways or during aggressive driving. This is particularly noticeable in **M5 or M540i models**, where the spoiler is factory-installed for performance tuning.

- On non-M models, it can still contribute to a slight reduction in drag, though the effect is less pronounced.

2. **Visual Appeal and Branding**

- The spoiler is a **distinctive feature** of BMW s sportier trims, enhancing the car s aggressive stance. For enthusiasts, it adds to the **premium, performance-oriented aesthetic** of the 5 Series.

- On older models (F10/F11), it can make the car look more modern if retrofitted, though this is subjective.

3. **Potential Resale Value Boost**

- If the car is in **M Sport or M Performance trim**, the spoiler is a **factory-installed feature** that buyers often associate with performance. Keeping it intact may slightly improve resale value for these models.

- On non-M models, a retrofitted spoiler could appeal to buyers looking for a sportier look, but this is less guaranteed.

4. **Protection Against Debris**

- The spoiler provides some **shielding for the rear window and trunk area**, reducing the risk of minor damage from road debris (e.g., gravel, small branches).

5. **Compatibility with Aftermarket Upgrades**

- If you plan to add **aftermarket performance parts** (e.g., cold air intakes, exhaust systems, or suspension upgrades), the spoiler can complement the overall sporty look.

- Some owners pair it with **lowered suspension** or **wide-body kits** for a more aggressive stance.

6. **Minimal Maintenance Requirements**

- Unlike soft-top convertibles or complex aerodynamic systems (e.g., active rear wings on high-end BMWs), this spoiler is **relatively low-maintenance**. It requires only occasional cleaning to prevent dirt buildup.

---

### **Cons of Installing or Retaining the Upper Rear Spoiler**

1. **Cost of Replacement or Retrofit**

- **New OEM spoilers** (e.g., from BMW or authorized dealers) can cost **$800 $1,500 **, depending on the model year and region.

- **Aftermarket replicas** (e.g., from brands like **BBS, Eibach, or custom fabricators**) may be cheaper (**$300 $800**) but risk **poor fitment, poor-quality materials, or incorrect aerodynamics**.

- **Installation labor** (if not DIY) adds **$200 $500**, depending on the shop.

2. **Potential for Poor Fitment or Damage**

- If the spoiler is **not properly aligned**, it can cause **wind noise, vibration, or even structural issues** (e.g., stress on the rear hatch or trunk lid).

- **Cheap aftermarket spoilers** may not match the factory design, leading to **aesthetic mismatches** or **aerodynamic inefficiencies**.

- **Accidental damage** (e.g., from a parking lot mishap or road debris) can be costly to repair, especially if the original part is no longer available.

3. **Weight Addition**

- The spoiler adds **significant weight** to the rear of the car, which can slightly **degrade fuel economy** and **affect handling dynamics** (especially in lighter models like the 520i).

- On **M5 or high-performance models**, the weight is less noticeable due to the car s already heavy chassis.

4. **Limited Practical Benefits for Non-Performance Models**

- On **non-M 5 Series models** (e.g., 520i, 523i), the aerodynamic benefits are **minimal** compared to the cost. The spoiler is more of a **cosmetic upgrade** than a functional one.

- If you don t drive aggressively or at high speeds, the **real-world impact on stability is negligible**.

5. **Potential for Increased Wind Noise**

- If the spoiler is **not sealed properly**, it can create **turbulence and wind noise** at highway speeds, detracting from the driving experience.

- Some owners report **hissing or rattling** if the spoiler is not perfectly aligned with the body.

6. **Compatibility Issues with Modifications**

- If you plan to **lower the car** (e.g., with coilovers), the spoiler may **interfere with clearance** or look out of place.

- **Wide-body kits or roof rails** can also create **aesthetic clashes** with the factory spoiler.

7. **Resale Value Impact (If Not Original)**

- If you **retrofit a non-OEM spoiler**, it may **diminish resale value** for buyers who prefer factory specifications.

- Some **BMW purists** prefer keeping the car as close to stock as possible, which could be a drawback if you sell later.

---

### **Conclusion and Recommendation**

#### **When Should You Buy/Retain the Upper Rear Spoiler?**

- **Keep the factory spoiler** it s a **performance-related feature** that enhances aerodynamics and looks. Retrofitting a non-OEM version is unnecessary unless you re going for a **custom build**.

- **Consider a high-quality aftermarket spoiler** (e.g., **BBS, Eibach, or a custom fabricator**) if you re willing to invest in aesthetics. Ensure it s **properly fitted** to avoid wind noise or handling issues.

- **Avoid cheap knockoffs** they often look tacky and may not fit well.

- The spoiler provides **marginal aerodynamic benefits**, so it s worth keeping or installing if you prioritize **stability and performance tuning**.

- **Retain the factory spoiler** if it s an M model. For non-M models, **skip the retrofit** unless you re targeting a niche buyer who appreciates sporty modifications.

#### **When Should You Skip It?**

- The weight and minor drag increase may not be worth it for daily commuters.

- If you mostly drive in city traffic, the spoiler is **mostly cosmetic**.

- The cost of a **new or high-quality aftermarket spoiler** may not justify the expense unless you re building a **custom performance car**.

- The spoiler may **not complement** other changes, leading to an **unbalanced look**.

---

### **Final Recommendation**

- **For M5/M540i Owners:** **Keep the factory spoiler** it s a performance feature, not just cosmetic.

- **Skip it unless you re modifying the car for a sportier look** and can afford a **well-made aftermarket version**.

- **Avoid cheap spoilers** they often look worse than no spoiler at all.

- **For Daily Drivers:** **The spoiler is unnecessary** unless you love the look and don t mind the minor trade-offs.

- **For Enthusiasts Building a Project Car:** **A high-quality spoiler can enhance the aesthetic**, but ensure it s **properly installed** to avoid handling issues.

- If you want the look without the cost, consider **removing the factory spoiler** (if present) and **adding a subtle aftermarket rear diffuser or lower body kit** instead.

- If you must have the spoiler, **stick to OEM or a reputable aftermarket brand** (e.g., **BBS, Eibach, or a BMW specialist**) to ensure fitment and quality.

Ultimately, the decision depends on **your budget, driving habits, and aesthetic preferences**. If you value **performance and authenticity**, the spoiler is worth it. If you re looking for **cost

Details:

Visit or call 947 210 4030. Parts must be resalable and in the original packaging. Or Visit . Genuine BMW Parts.

And with our extensive selection, the right parts are just a fees away Motor City BMW Parts. In stock orders ship within 24 hours. #248 594 7849. Electrical parts are not returnable.

Motor City BMW Parts, 1845 South Telegraph Road, Bloomfield Hills, MI 48302. Shipping Carrier substitutions may be made at our determination in an attempt to reduce shipping cost the customer.

part #: 51137497208 price

• $413.54

specifications ocoosys:

• for makes: Bmw
• mpn: 51-13-7-497-208
• part type: Flap
• genuine oem: Yes
• manufacturer warranty: 1 Year
• universal fitment: Direct Replacement
• parts included: Only Part Reference 0 On The Diagram Is Included
• replaces part number: 51137473506

offer ocoosys:

• started: April 22, 2026
• availability: In Stock
• quantity: 2
• sold: 0
• options: Ship-to-home

general ocoosys:

• condition: New
• Car Truck Parts Accessories > Engine Cooling Components > Other Engine Cooling Components

returns ocoosys:

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

shipping ocoosys:

• carrier: UPS
• type: Fixed
• service: UPS Ground
• cost: $35.49
• class: Standard
• transit: 3-9 Days

payments ocoosys:

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

seller ocoosys:

• city: Bloomfield Hills, Michigan
• rating: 99.3%
• # reviews: 949

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