1. Sway Bars Suspension Steering For Sale
  2. sku: 15045171466167632
  3. BMW 686596901

BMW 686596901 Rear Stabilizer Sway Bar Anti Roll MD644

fits model: 640i, G32, Gt. make: Bmw. year: 2017–2020.

686596901 Bmw 17-20 640i Gt G32 2018 Rear Stabilizer Sway Bar Anti Roll

( Manufacturer Part Number: 686596901 ), ( Part Type: Stabilizer Bar ), ( Oe/oem Part Number: 17 18 19 20 2017 2018 2019 2020 ), ( Country Of Origin: Germany ), ( Ipn: Md644 08.04.2026 297 ), ( Manufacturer Warranty: 1 Month )

Review BMW Rear Stabilizer Sway Bar Anti Roll fits 640I G32 GT 2017–2020

The **BMW 686596901 Rear Stabilizer Sway Bar (Anti-Roll Bar) for the 2018 6 Series (G32) 640i GT** is a precision-engineered suspension component designed to enhance stability, handling, and overall driving dynamics for this luxurious grand tourer. Crafted from high-grade, heat-treated steel, this aftermarket stabilizer bar is built to meet or exceed OEM specifications, ensuring a perfect fit and reliable performance. The G32 640i GT, known for its blend of sporty agility and refined comfort, benefits significantly from an upgraded rear sway bar, which reduces body roll during aggressive cornering, sharp lane changes, or high-speed maneuvers. This component is particularly advantageous for enthusiasts who seek a more engaged, responsive ride without sacrificing the 6 Series signature plushness. The stabilizer bar features a robust mounting system with reinforced bushings and mounting brackets, designed to withstand the stresses of spirited driving while maintaining durability over time. Whether installed as part of a full suspension upgrade or as a standalone performance enhancement, this sway bar delivers measurable improvements in lateral grip, tire contact, and overall vehicle control, making it an ideal choice for those who demand both luxury and performance from their BMW. Its compatibility with the 2018 model year ensures seamless integration with the factory suspension geometry, allowing for optimal tuning and fine-tuning of the vehicle s handling characteristics.

### Pros and Cons of Buying a BMW 686596901 Rear Stabilizer Bar (2018 6 Series 640i GT/G32)

#### **Pros:**

1. **Improved Handling Stability** A rear stabilizer bar reduces body roll during cornering, making the car feel more planted and responsive, especially in aggressive driving or high-speed maneuvers. This is particularly beneficial for the G32 (AWD) model, where rear-wheel bias can lead to oversteer if not properly managed.

2. **Enhanced Comfort on Rough Roads** While a stiffer sway bar may make the ride slightly firmer, it can reduce excessive lean in uneven terrain, improving predictability and reducing driver fatigue over long drives.

3. **Better Performance in Dynamic Driving** For enthusiasts who enjoy track-like conditions or spirited driving, a rear stabilizer bar can help maintain traction and reduce the risk of uncontrolled slides, especially in the 640i s powerful setup.

4. **Compatibility with Other Modifications** If you ve already installed other performance upgrades (e.g., stiffer suspension, sport exhaust, or ECU tuning), a rear sway bar can complement those changes by further refining the car s balance.

5. **Easy Installation** The 686596901 part is a direct replacement for the OEM rear stabilizer bar, meaning it should fit without major modifications. Installation typically requires basic tools and can be done in a few hours with some mechanical experience.

6. **Cost-Effective Upgrade** Compared to full suspension overhauls or track-focused modifications, a sway bar is a relatively inexpensive way to noticeably improve handling dynamics.

7. **Maintains Original Aesthetics** Unlike aftermarket parts that may alter the car s appearance, this is a functional upgrade that doesn t require cosmetic changes.

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#### **Cons:**

1. **Potential Ride Quality Trade-Off** A stiffer rear sway bar can make the ride feel less plush, especially on bumpy roads or in city driving. If you prioritize comfort over sportiness, this may be noticeable.

2. **Minimal Impact on Severe Oversteer** While it helps with body roll, a sway bar alone won t eliminate oversteer issues caused by excessive power delivery or poor tire grip. Other modifications (e.g., ECU tuning, differential adjustments) may still be needed for full control.

3. **Wear on Bushings and Mounts** Over time, the sway bar s mounting points (bushings) can wear out, leading to rattles or reduced effectiveness. This is a common issue with aftermarket sway bars unless high-quality bushings are used.

4. **Limited Benefit for Front-Heavy Loads** The 6 Series (especially the G32) is front-heavy due to its engine placement. A rear sway bar alone won t compensate for this weight bias; a front sway bar or weight distribution adjustments might be more effective.

5. **Potential for Improper Fitment** If the part isn t installed correctly (e.g., incorrect torque on bolts or misalignment), it could cause handling issues or even damage to the suspension components.

6. **Not a Substitute for Full Suspension Tuning** For serious track use or aggressive driving, a sway bar is just one piece of the puzzle. A full suspension setup (adjustable dampers, coilovers, etc.) would yield better results.

7. **Quality Variability** While the 686596901 is an OEM-style part, aftermarket versions may vary in quality. Cheaper alternatives might use subpar materials, leading to premature failure or poor performance.

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### **Conclusion:**

The **BMW 686596901 rear stabilizer bar** is a worthwhile upgrade for owners of the 2018 6 Series 640i GT/G32 who want to enhance handling stability, reduce body roll, and improve confidence in dynamic driving. It s particularly useful for those who enjoy spirited driving but don t want to invest in a full suspension overhaul. However, it s not a magic fix for oversteer or poor weight distribution, and it may slightly compromise ride comfort.

If your primary goal is **better cornering feel and reduced lean**, this part will deliver noticeable improvements. If you re looking for **track-level performance or a significantly firmer ride**, consider pairing it with other modifications (e.g., front sway bar, sport suspension, or ECU tuning).

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### **Recommendation:** - **Buy it if:**

- You drive aggressively or enjoy track days.

- You ve noticed excessive body roll in corners.

- You want a cost-effective way to refine the car s handling before investing in more extensive upgrades.

- You re comfortable with a slightly firmer ride in exchange for better stability.

- **Avoid it if:**

- You prioritize comfort over sportiness and rarely drive on twisty roads.

- You plan to use the car primarily for daily commuting or highway driving.

- You haven t addressed other handling issues (e.g., soft suspension, poor tire grip).

- You re on a tight budget and can t afford to replace worn bushings later.

**Final Verdict:** For the average enthusiast driving a 640i GT/G32, this is a **highly recommended upgrade** that offers a good balance of performance and practicality. Pair it with proper installation and consider complementary mods (like a front sway bar or sport dampers) for even better results. Always source the part from a reputable supplier to ensure quality.

Details:

Please see the photo for details. Color: Royal Burgundy Red Metallic C25. Mileage: 24676 ml. Check my other listings.

BMW 640I Drive Gran Truism 2018. Engine: 3.0L. Having profound knowledge in cars you can be assured our competency and accuracy. Transmission: AT.

Contact phone number of the receiving person;. E-mail address to send a confirmation;. Refer to photos for more details. Company name and address;.

part #: 686596901 price

  • $106.00

specifications swabasus:

  • for models: 640i, G32, Gt
  • for makes: Bmw
  • for years: 2017-2020
  • mpn: 686596901
  • part type: Stabilizer Bar
  • oe/oem part number: 17 18 19 20 2017 2018 2019 2020
  • country of origin: Germany
  • ipn: Md644 08.04.2026 297
  • manufacturer warranty: 1 Month

seller swabasus:

  • rating: 99.9%
  • city: Philadelphia, Pennsylvania
  • # reviews: 6392

general swabasus:

  • Car Truck Parts Accessories > Steering Suspension > Sway Bars, Links Bushings
  • condition: Used

shipping swabasus:

  • type: Fixed
  • carrier: UPS
  • cost: $0.00
  • class: Standard, Expedited
  • service: Standard, UPS 2nd Day Air
  • transit: 4-7 Days

offer swabasus:

  • options: Ship-to-home
  • started: April 17, 2026
  • best offers: True
  • availability: In Stock
  • quantity: 1
  • sold: 0

returns swabasus:

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

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for models: 640i, g32, gt, for makes: bmw, for years: 2017-2020, part type: stabilizer bar, oe/oem part number: 17 18 19 20 2017 2018 2019 2020, country of origin: germany, manufacturer warranty: 1 month,
category: auto parts > car truck parts accessories > steering suspension > sway bars, links bushings, sku: 15045171466167632,
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1 offer $106.00 USD
  • Used. Offer #1 priced at $106.00 + $0.00 shipping estimate = $106.00* total. BMW 640I Xdrive Gran Turismo 2018.FREE SHIPPING

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