FORD BM51-A237W21-RRW Left Rear Auto Up Down Power Window Switch

( Manufacturer Part Number: BM51-A237W21-RRW ), ( Type: Door Handle ), ( Shape: Rectangular ), ( Manufacturer Warranty: 1 Year ), ( Color: Black ), ( Features: Easy Installation ), ( Material: Plastic ), ( Vintage Part: No ), ( Placement On Vehicle: Rear Left )

Review FORD Left Rear Auto Up Down Power Window Switch Oem fits FOCUS 2012–2018

The **Ford BM51-A237W21-RRW 12-18 Focus Left Rear Auto Up/Down Power Window Switch** is a high-quality, factory-specification electrical component designed exclusively for the **2013 2018 Ford Focus** models, ensuring seamless integration with the vehicle s power window system. This **left-rear auto-up/down window switch** is engineered with precision to deliver smooth, responsive operation, allowing drivers and passengers to effortlessly control the rear window via a simple press-and-hold mechanism. Constructed from durable, corrosion-resistant materials, this switch is built to withstand the rigors of daily use while maintaining long-term reliability, even in varying environmental conditions. The **12V electrical compatibility** ensures seamless integration with the vehicle s existing wiring harness, eliminating the need for complex modifications or additional adapters. Featuring a **robust, ergonomic design**, the switch includes a **clear, tactile feedback mechanism** that confirms engagement, reducing the risk of accidental activation. Whether replacing a worn-out original component or upgrading an aftermarket installation, this switch delivers the same **factory-level performance** as OEM parts, ensuring a perfect fit and optimal functionality. Ideal for both professional auto technicians and DIY enthusiasts, this switch is a straightforward, no-fuss solution for restoring or enhancing the convenience of your Ford Focus s power window system.

**Pros and Cons of buying a Ford Part Number: BM51-A237W21-RRW (12V Focus Left Rear Auto Up/Down Power Window Switch)**

1. **Compatibility** This part is designed specifically for the Ford Focus, ensuring a proper fit and function without modification. It is a direct replacement for the original equipment manufacturer (OEM) window switch, which reduces the risk of compatibility issues.

2. **Auto-Up/Down Functionality** The switch includes the auto-up and auto-down features, which are convenient for users who frequently use this function. This can enhance the overall driving experience by making window adjustments quicker and more intuitive.

3. **Power Window Operation** As a power window switch, it is designed to work seamlessly with the vehicle s electrical system, providing smooth and reliable operation when paired with the correct motor and wiring.

4. **Quality and Durability** Ford parts, even aftermarket or remanufactured ones, are generally built to meet or exceed OEM standards. This switch should be durable and resistant to wear over time, especially if it is a genuine or high-quality aftermarket replacement.

5. **Easy Installation** Since it is a direct replacement, installation typically involves unplugging the old switch, removing the trim panel, and connecting the new switch. This process is straightforward for those with basic mechanical skills or can be done by a professional.

6. **Cost-Effective** Replacing a faulty window switch is often more economical than repairing or replacing the entire window motor or regulator. This part is relatively inexpensive compared to the labor costs associated with more complex repairs.

7. **Widespread Availability** Ford parts, including window switches, are widely available through auto parts stores, online retailers, and dealerships. This makes it easier to source the part quickly, even if you need to order it.

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1. **Potential Counterfeit Parts** Purchasing from untrusted sellers (especially online marketplaces) may result in receiving a counterfeit or low-quality part. Counterfeit parts may not function correctly, could fail prematurely, or may not fit properly, leading to further issues.

2. **Wiring or Electrical Issues** If the vehicle s wiring harness or electrical system is damaged or corroded, replacing just the switch may not resolve the problem. You might need to inspect or repair the wiring to ensure the new switch works properly.

3. **Compatibility with Modified Vehicles** While this part is designed for the Ford Focus, modifications such as aftermarket window regulators or motors may require additional adjustments or compatible parts. Always verify compatibility if your vehicle has been altered.

4. **Learning Curve for Installation** Although the installation is generally simple, some users may find it challenging, especially if they are not familiar with working on their vehicle s electrical system. Improper installation could lead to short circuits or damage to the switch.

5. **Limited Lifespan** Like all mechanical or electrical components, this switch may wear out over time, particularly if the vehicle is frequently used or exposed to harsh conditions (e.g., extreme temperatures, moisture, or road salt).

6. **Price Variability** Prices for this part can vary significantly depending on the seller, brand, and whether it is a genuine Ford part, a remanufactured part, or a third-party aftermarket option. Higher prices do not always guarantee better quality.

7. **Potential for Recalls or Defects** Even OEM or high-quality aftermarket parts can have defects or recalls. Always check for recalls or warranty coverage before purchasing, especially if buying from a dealership or authorized seller.

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The Ford BM51-A237W21-RRW power window switch is a practical and reliable replacement part for the Ford Focus, offering auto-up/down functionality and seamless integration with the vehicle s electrical system. Its ease of installation, cost-effectiveness, and widespread availability make it an attractive option for those looking to repair a faulty window switch. However, potential buyers should be cautious of counterfeit parts, ensure compatibility with their vehicle, and address any underlying wiring issues to avoid further problems. Purchasing from a reputable seller and verifying the part s authenticity will help maximize its performance and longevity.

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If you are replacing a faulty rear left power window switch on your Ford Focus, I recommend the following steps to ensure a successful purchase and installation:

1. **Verify Compatibility** Double-check that this part number corresponds exactly to your vehicle s model and year. Cross-reference with your vehicle s manual or a trusted online database to avoid mismatches.

2. **Purchase from a Trusted Source** Buy the part from a well-known auto parts retailer (e.g., RockAuto, AutoZone, O Reilly Auto Parts, or a Ford dealership) or a reputable online seller with positive reviews. Avoid suspiciously low prices that may indicate counterfeit goods.

3. **Inspect the Part Upon Arrival** Carefully examine the packaging and the part itself for signs of damage, wear, or inconsistencies. Ensure the part is labeled correctly and matches the description.

4. **Address Underlying Issues** Before installation, inspect the wiring harness, connectors, and window motor for any signs of damage, corrosion, or wear. Clean or repair these components as needed to prevent future failures.

5. **Follow Installation Instructions Carefully** Refer to a repair guide or video tutorial specific to your vehicle model. Take your time during installation to avoid damaging the trim or electrical connections.

6. **Test the Switch After Installation** Once installed, thoroughly test the window switch to ensure it operates smoothly in all directions (up, down, auto-up, and auto-down). If issues persist, consult a professional mechanic to diagnose potential wiring or motor problems.

7. **Consider Genuine or High-Quality Aftermarket Parts** If budget allows, opt for a genuine Ford part or a well-reviewed aftermarket brand (e.g., Dorman, Bosch, or ACDelco) to ensure reliability and longevity.

By following these recommendations, you can confidently replace your Ford Focus s rear left power window switch and restore proper functionality to your vehicle.

Details:

Used OEM part. Switch operates smoothly. Buyer pays return shipping. Normal wear from age and use.

No major cracks or damage. Ford Focus Left Rear Door. Ships fast and well protected. Original Ford factory part not aftermarket.

Mounting tabs intact. Part Number: BM51-A237W21-RRW. Compatibility. This is the desirable auto up / down one-touch express switch allowing window to fully raise or lower with a single press instead of holding button.

Item has not been cleaned and remains in original condition. Please review all photos for exact condition. OEM left rear door power window switch with bezel removed from a Ford Focus.

part #: bm51a237w21 prices

• $13.59-$85.21

specifications cardoorhandleei:

• for models: Focus
• for makes: Ford
• for years: 2012-2018
• mpn: Bm51-a237w21-rrw
• type: Door Handle
• shape: Rectangular
• manufacturer warranty: 1 Year
• color: Black
• features: Easy Installation
• material: Plastic
• vintage part: No
• placement on vehicle: Rear Left

shipping cardoorhandleei:

• transit: 3-8 Days
• cost: $15.25
• service: USPS Ground Advantage
• carrier: USPS
• class: Standard
• type: Calculated

payments cardoorhandleei:

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

seller cardoorhandleei:

• city: West Haven, Connecticut
• rating: 99.6%
• # reviews: 751

general cardoorhandleei:

• condition: Used
• Car Truck Parts Accessories > Interior Parts Accessories > Window Cranks, Grab Handles Door Pulls

returns cardoorhandleei:

• policy: No Returns

offer cardoorhandleei:

• options: Ship-to-home
• started: February 4, 2026
• best offers: True
• quantity: 1
• sold: 0
• availability: In Stock

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