BMW 51917387934 Rear Gas Fuel Door Tank Filler Flap Cover 177.BM1O18 Lid

( Manufacturer Part Number: 51917387934 ), ( Part Type: Fuel Cover Lid Door Tank Filler Flap ), ( Conditions Options: Fuel Filler Door ), ( Genuine Oem: Yes ), ( Ipn: 177.bm1o18 ), ( Year: 2018 ), ( Descriptionpartcondition: Has Some Damage Deemed Non Material. Paint Code )

Review BMW Rear Gas Fuel Tank Filler Door Flap Cover Lid fits 540I G30 540 2017–2023

The **BMW 51917387934** is a precision-engineered replacement part designed specifically for the **2017 2023 5 Series G30 (F90) models**, serving as the **rear gas fuel tank filler door flap cover lid**. Crafted from high-quality, durable materials, this component ensures a seamless fit and optimal functionality while maintaining the vehicle s sleek, aerodynamic profile. The flap cover is meticulously designed to align perfectly with the bodywork, providing a clean, factory-like appearance that enhances both the aesthetic and structural integrity of the rear fuel filler area. Constructed with a robust yet lightweight material, it is resistant to warping, cracking, or deformation under normal operating conditions, ensuring long-lasting performance even in varying environmental conditions. The precise cutouts and alignment features guarantee a snug seal, preventing drafts, debris, and moisture from infiltrating the fuel system, thereby safeguarding the vehicle s internal components. Whether installed during routine maintenance or as part of a customization upgrade, this replacement part is engineered to meet BMW s exacting standards, delivering a perfect blend of form and function for owners seeking both reliability and a refined finish. Its compatibility with the G30 platform ensures an effortless installation process, allowing mechanics and DIY enthusiasts alike to restore or enhance the rear fuel filler area with confidence.

### **Pros and Cons of Buying a BMW 5 Series (G30) 540i (2017-2023) with a Replacement Fuel Tank Filler Door Flap Cover Lid (Part #51917387934)**

#### **Pros of purchasing a Replacement Part**

1. **Authentic Fit and Finish** This is an OEM (Original Equipment Manufacturer) or high-quality aftermarket part designed specifically for the BMW 540i (G30) model range. It ensures a seamless fit, matching the original aesthetics and functionality of the fuel filler door flap.

2. **Improved Durability** The original flap cover is prone to wear, especially in older vehicles or those exposed to harsh conditions (e.g., road salt, UV exposure). A replacement ensures the flap remains sturdy, reducing the risk of premature failure or misalignment.

3. **Prevents Further Damage** A failing fuel filler door flap can lead to water ingress, electrical issues (if sensors are involved), or even fuel leaks if the seal deteriorates. Replacing it proactively avoids costly repairs down the line.

4. **Enhanced Aesthetics** If the original flap is cracked, discolored, or misaligned, a new one restores the vehicle s appearance, contributing to a more polished look, especially important for high-end models like the 540i.

5. **Compatibility with Aftermarket Mods** Some aftermarket fuel tank modifications or performance upgrades may require a properly functioning filler door. A new flap ensures compatibility without voiding warranties or causing fitment issues.

6. **Ease of Installation** While some BMW parts can be tricky, this flap cover is relatively straightforward to replace, especially for those with basic mechanical experience. Many online guides and YouTube tutorials simplify the process.

7. **Long-Term Cost Savings** Replacing a worn-out flap is far cheaper than potential repairs to the fuel system, electrical components, or interior damage caused by water leakage.

---

#### **Cons of purchasing a Replacement Part**

1. **Cost** As an OEM or high-quality aftermarket part, this flap cover is not extremely cheap. Depending on the seller (BMW dealer, authorized parts supplier, or third-party retailer), prices can range from **$100 to $250 **, which may be a significant investment for a single component.

2. **Potential Counterfeit Parts** If purchasing from an untrusted seller (especially online marketplaces), there s a risk of receiving a **counterfeit or low-quality replica**. These may not fit properly, lack proper seals, or fail prematurely. Always buy from reputable sources with return policies.

3. **Labor Costs (If Not DIY)** If you re not comfortable performing the replacement yourself, labor costs at a BMW dealership or independent shop can add **$100 $200 **, increasing the total expense.

4. **Time-Consuming Installation** While not overly complex, removing the old flap and installing the new one requires disassembling parts of the fuel filler housing, which may take **1 3 hours** depending on your skill level.

5. **Possible Additional Wear** If the surrounding fuel filler housing or seals are degraded, replacing just the flap may not fully resolve the issue. You might need to address other components (e.g., gaskets, hinges) simultaneously.

6. **Limited Availability of Genuine Parts** While this part is widely available, some BMW dealerships may mark up OEM parts significantly. Aftermarket options (e.g., from **Akebono, Dorman, or local BMW specialists**) can be more affordable but may not always match the exact finish.

7. **Potential for Misalignment** If not installed correctly, the new flap may not latch properly, leading to a loose or improperly sealed fuel filler door, which could cause functional issues.

---

### **Conclusion**

Replacing the fuel tank filler door flap cover on a **BMW 540i (G30, 2017 2023)** is a **practical and often necessary maintenance task** that prevents minor issues from escalating into major problems. The benefits **improved durability, aesthetics, and functionality** outweigh the drawbacks for most owners, especially those who prioritize long-term reliability.

- **Buy from a trusted supplier** (BMW Authorized Parts, reputable aftermarket brands, or well-reviewed online retailers).

- **Consider DIY installation** to save on labor costs.

- **Inspect surrounding components** (seals, hinges) to ensure the flap functions correctly after replacement.

### **Final Recommendation**

- The current flap is cracked, warped, or not sealing properly.

- You notice water ingress or electrical issues near the fuel filler.

- You want to maintain the vehicle s resale value and appearance.

**Avoid delaying the replacement** a failing flap can lead to more expensive repairs. If budget is a concern, prioritize this fix over cosmetic upgrades, as it directly impacts the vehicle s functionality.

For the best value, compare **OEM vs. aftermarket options**, check seller reviews, and proceed with installation if confident. If unsure, consult a BMW specialist for guidance.

Details:

Paint code: Schwartz II / Jet Black 668 , 51 91 7 387 934, 7387934, 51-91-7-387-934. Suggested Fitment. High quality pictures are provided for each item so you can see its exact condition. Mileage: 90000.

As part of our commitment to a more sustainable future when make sense, we attempt re-use packaging materials when possible for shipping purposes. Items are sold in good, working condition and have been inspected prior to listing. Item Condition. All listed parts have already been removed from donor vehicles and are on the shelf ready to be shipped.

Notes: Fuel Filler Door BLK668 Has some damage - deemed non material. Stock Number: 1805. Fitment Compatibility.

part #: 51917387934 prices

• $69.94-$119.00

specifications fueltanksysteme:

• for models: 540i, G30, 540
• for makes: Bmw
• for years: 2017-2023
• mpn: 51917387934
• part type: Fuel Cover Lid Door Tank Filler Flap
• conditions options: Fuel Filler Door
• genuine oem: Yes
• ipn: 177.bm1o18
• year: 2018
• descriptionpartcondition: Has Some Damage Deemed Non Material. Paint Code

payments fueltanksysteme:

• credit card: Mastercard
• wallet: Paypal
• other

seller fueltanksysteme:

• city: San Marcos, California
• # reviews: 743
• rating: 100.0%

offer fueltanksysteme:

• options: Ship-to-home
• sold: 0
• quantity: 1
• availability: In Stock
• started: May 9, 2026

shipping fueltanksysteme:

• service: Standard
• transit: 4-9 Days
• class: Standard
• cost: $0.00
• type: Fixed

general fueltanksysteme:

• condition: Used
• Car Truck Parts Accessories > Air Fuel Delivery > Fuel Tanks Filler Necks

returns fueltanksysteme:

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

Bmw 51917387934 Is Similar To:

• 0280142150 Bosch Tank Breather Valve Purge Bmw Ferrari Audi (29.9% similar) This is the oem bmw fuel purge valve out of a 1995 325IS. If for some reason an item arrives damaged or is not working as described, please directly. It is important that if you are happy with your service and products, leave us a 5 start positive rating. You can also day or night. Will fit all ...(October 3rd, 2018)
• 10844 Stant Bmw Gas Cap (20.4% similar) Brand new in box Stan gas cap for bmw 3 series...(December 23rd, 2017)
• 1182156 1 182 156 Oem Bmw Fuel Vapor Expansion Tank Gas (23.1% similar) Hello everyone. Please understand that hardware fasteners bolts, nuts, etc. With mounting screws. This part is oem factory bmw in good, clean condition. Are not automatically included with all parts, but when available, we include any good hardware and or extras that can refer to this in the ...(October 12th, 2018)
• 1183755 Bmw Fuel Tank Filler Neck (40.7% similar) The item was pulled from a 2000 bmw 328I with 199,736 miles...(February 1st, 2019)
• 1183890 Bmw Coupe Fuel Expansion Tank Vent Pipe (31.1% similar) May not fit all vehicles within stated year range, due to possible variations. Please refer to pictures for item condition...(September 10th, 2018)
• 1184438 Bmw Fuel Filler Neck Gas Cap (36% similar) Any defects may be noted in the but buyer should closely inspect photos prior to purchase. Likewise, any fitment details are merely a suggestion, it can not always be 100 accurate because of differences in model, trim, engine and drive train, etc. Some normal wear and scuffs may not be visible in ...(July 8th, 2018)
• 1184447 1 184 447 Bmw Fuel Gas Expansion Tank Vapor Reservoir Oem (28.2% similar) Part: 1184447 prices...(October 28th, 2018)
• 1184668 Bmw Fuel Gas Cap Green Oem (29.4% similar) Bmw fuel gas cap green oem...(March 7th, 2018)
• 13907595191 1390-7595191 1390-7-595-191 Oem Bmw Gas Fuel Tank Pump Sender Hose Pipe Line (41.2% similar) We typically reply within the hour. Warranty only covers damaged or defective parts...(October 23rd, 2018)
• 13907838441 Bmw Fuel Tank Breather Pipe (31.6% similar) The engine and or transmission must be in original condition as listed photos. All new parts under 'performance parts' carry their own manufacturers guarantee. Engines transmissions: if an engine or transmission is defective with in the 30-DAY guarantee, please for return directions. Please e-mail ...(April 11th, 2018)
• 14467646 Qr Parts Fuel Pump For Bmw Electric Module 723650677124 (34.5% similar) Please for any questions. Some manufacturers require that you register your product to activate its warranty. The manufacturers warranty shall be exclusive remedy for any such product defect or failure. Each warranty gives you specific rights, and may have other rights which vary from state...(May 25th, 2018)