EIBACH 8259.320HA Rear Sway Bar Anti Roll E/r

( Brand: Eibach ), ( Manufacturer Part Number: 8259.320HA ), ( Part Type: Bar )

Review EIBACH Rear Sway Bar Lexus Anti Roll E/r fits IS300 2001–2005

The **Eibach 8259.320HA Rear Sway Bar for Lexus IS300 (2001 2005)** is a precision-engineered aftermarket component designed to elevate the handling dynamics of your Lexus IS300 by reinforcing its rear anti-roll bar system. Engineered by Eibach, a brand synonymous with performance tuning and suspension optimization, this sway bar is crafted to deliver a noticeable improvement in cornering stability, body control, and overall driving engagement without compromising the inherent comfort of the IS300 s ride. The **320HA** designation indicates a hardened steel construction, ensuring durability and resistance to fatigue under high-stress conditions, while the **8259** part number confirms its exact fitment for the rear axle of the 2001 through 2005 model years, including both the standard and sport-tuned variants of the IS300. Unlike stock sway bars, which prioritize a softer, more forgiving ride, this Eibach unit features a stiffer torsion rate, effectively reducing body roll during aggressive maneuvers while maintaining a neutral steering feel. This makes it an ideal choice for drivers seeking a balance between sporty responsiveness and practical daily usability, particularly those who enjoy spirited driving or track-day sessions. The sway bar s robust construction also minimizes flex, ensuring consistent performance even under sustained lateral forces, which is particularly beneficial for those who push their vehicle beyond factory specifications. Installation is straightforward, requiring only basic tools and a bit of mechanical know-how, though it s recommended to follow Eibach s guidelines or consult a professional to ensure proper alignment and torque specifications are met. Whether you re looking to sharpen your IS300 s cornering prowess, enhance its sport-tuned character, or simply future-proof your suspension against wear, the Eibach 8259.320HA rear sway bar stands as a reliable and high-performance upgrade that delivers measurable results without the need for extensive modifications.

### Pros and Cons of buying a Eibach 8259.320HA Rear Sway Bar for a Lexus IS300 (2001 2005)

1. **Improved Handling and Stability** A stiffer rear sway bar reduces body roll during cornering, making the IS300 feel more planted and responsive. This is particularly noticeable on twisty roads or when pushing the car harder.

2. **Better Weight Distribution** The Eibach sway bar is designed to be stronger than the stock unit, which can help reduce understeer in aggressive driving scenarios. This is beneficial for drivers who enjoy dynamic or sporty driving styles.

3. **Durability and Quality** Eibach is a well-respected brand in the aftermarket suspension industry, known for producing high-quality, long-lasting components. The 8259.320HA is a direct replacement with no compromises in material or construction.

4. **Easy Installation** The sway bar is a straightforward bolt-on upgrade. Most mechanics or experienced DIYers can install it in under an hour, though some may need to adjust the rear subframe bushings or lower control arms for optimal performance.

5. **Compatibility with Other Mods** If you ve already installed other performance upgrades (e.g., stiffer springs, lower coils, or sway bar links), this sway bar will complement those changes by further refining the car s balance.

6. **Maintains Stock Fitment** Unlike some aftermarket parts that require modifications, the Eibach sway bar fits directly where the stock unit was, ensuring no clearance issues with the chassis or suspension components.

7. **Cost-Effective Performance Upgrade** Compared to full suspension overhauls or more complex modifications, replacing the sway bar is a relatively inexpensive way to noticeably improve handling.

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1. **Potential for Oversteer** While the sway bar reduces body roll, it can make the rear end feel less forgiving in extreme conditions. If you re not used to a more aggressive rear bias, you might find the car feels less stable at the limits, especially on loose or uneven surfaces.

2. **Harshness on Rough Roads** A stiffer sway bar can transmit more road imperfections to the cabin, making bumps and potholes feel harsher. This is less noticeable on smooth roads but may be a drawback for daily driving on rough pavement.

3. **Limited Adjustability** Unlike some aftermarket sway bars that offer adjustable stiffness, the Eibach 8259.320HA is fixed in its stiffness. If you later decide you want a softer or stiffer setup, you ll need to replace it again.

4. **Possible Noise or Rattles** If the mounting points or bushings are worn, the new sway bar could introduce new noises (e.g., clunks or rattles) if not properly aligned or if the surrounding suspension components are degraded.

5. **Not a Substitute for Full Suspension Tuning** While this sway bar improves handling, it won t address issues like worn bushings, shocks, or alignment problems. If your suspension is otherwise worn, you may need additional work for the best results.

6. **Potential for Overmodding** If you re not careful, combining this sway bar with other stiffening mods (e.g., stiffer springs, lower coils, or sway bar links) could make the car feel too stiff or unstable, especially for casual driving.

7. **Stock Sway Bar Was Fine for Most Drivers** For the average driver who doesn t aggressively corner or push the IS300, the stock sway bar may already provide adequate stability. The upgrade is more noticeable to enthusiasts or those who frequently drive on winding roads.

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The Eibach 8259.320HA rear sway bar is a solid, no-nonsense upgrade for the Lexus IS300 (2001 2005) that delivers measurable improvements in handling and stability. It s particularly well-suited for drivers who enjoy sportier or more dynamic driving styles and are willing to trade a slight increase in road harshness for better cornering performance. However, it s not a magic fix it works best when paired with a well-maintained suspension and may not be necessary for those who primarily use the car for commuting or relaxed driving.

If you re looking to enhance the IS300 s performance without a full suspension rebuild, this sway bar is a practical and effective choice. Just be mindful of potential trade-offs in comfort and ensure the rest of your suspension is in good condition to avoid unintended side effects.

- You frequently drive on twisty roads or enjoy aggressive cornering.

- You ve already made other performance mods (e.g., stiffer springs, sway bar links) and want to refine the setup.

- You re comfortable with a slightly firmer ride and don t mind the minor increase in road noise.

- You plan to install it alongside other suspension upgrades (e.g., lower coils, bushings) for a balanced feel.

- You mostly drive on highways or in urban areas where comfort is prioritized.

- Your suspension is worn or misaligned, as the sway bar won t fully compensate for those issues.

- You re unsure about the car s handling characteristics and want to avoid a potentially harsher or less stable feel.

- You prefer a more gradual or adjustable approach to tuning (e.g., sway bar links or adjustable bars).

For most enthusiasts who want a noticeable handling upgrade without a major investment, the Eibach sway bar is a worthwhile addition. Pair it with proper alignment and suspension maintenance to ensure the best results.

Details:

Part: Eibach Rear Sway Bar. OEM used part removed from a running vehicle.Tested and inspected before removal.Part: ABS TRC COMPUTER CONTROL MODULE. PART NUMBER E/R 8259.320HA. Vehicle: 2001 2005 LEXUS IS300.

Part Number: 89540-53150. Suggested For You. Eibach Rear Sway Bar for Lexus IS300 2001 2005 Anti Roll E/R 8259.320HA. Product Specifics.

part #: 8259320ha price

• $200.00

specifications swabasus:

• for models: Is300
• for makes: Lexus
• for years: 2001-2005
• brand: Eibach
• mpn: 8259.320ha
• part type: Bar

shipping swabasus:

• service: USPS Ground Advantage, UPS Ground, FedEx Ground / FedEx Home Delivery
• class: Standard
• type: Fixed
• cost: $0.00
• carrier: USPS, UPS, FedEx
• transit: 3-6 Days

seller swabasus:

• rating: 100.0%
• city: Sacramento, California
• # reviews: 1

returns swabasus:

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

general swabasus:

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

offer swabasus:

• sold: 0
• availability: In Stock
• quantity: 1
• best offers: True
• started: May 29, 2026
• options: Ship-to-home

payments swabasus:

• other
• credit card: Discover
• wallet: Paypal

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