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KONI Special Active Shock Absorber - Rear - 8245-1357

KONI Special Active Shock Absorber - Rear - 8245-1357

The Koni Special Active Shock Absorbers control suspension movement through automatic hydraulic da...

Best current price£113.05from Demon Tweeks

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Demon TweeksKoni Special Active Shock Absorber - Rear
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£113.05
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eBayKoni Special Active Rear Shock Absorber (FSD) Fits BMW 1 Series, (8245-1357)
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Product Information

Full details

The KONI Special Active Shock Absorber (8245-1357) is designed for drivers who want to upgrade their vehicle's handling without sacrificing ride comfort. By utilizing advanced Frequency Selective Damping (FSD) technology, these dampers automatically adjust to road conditions to minimize body roll and improve stability during aggressive maneuvers. While this system offers a significant performance boost over standard replacement shocks, it is a passive mechanical design, meaning it does not offer the on-the-fly electronic adjustments found in active high-end track-focused suspension systems.

All features

Model Part Number8245-1357
BrandKONI

Extended Product Information

FAQs

Do I need electronic sensors to use KONI Special Active shocks?

No. These shocks are entirely passive and mechanical, so they do not require any electronic integration or sensors.

Can I use these shocks for track racing?

While they significantly improve handling, they are designed for performance street driving. For dedicated track use, KONI offers other product lines better suited for constant high-intensity track conditions.

How long do these shock absorbers typically last?

Longevity depends on road conditions and driving style, but they are built for durability and are engineered to match or exceed the lifespan of high-quality original equipment shocks.

Will these shocks make my ride feel stiffer?

They will feel firmer during maneuvers, but because of the FSD technology, they often provide a more controlled and comfortable ride than standard stiff sport shocks.

Can I install just one shock absorber?

No. Shock absorbers must always be replaced in pairs (axle sets) to ensure balanced handling and safety.

Troubleshooting

Noticeable oil leak at the base of the shock

The internal seal has failed; the unit must be replaced as it cannot be repaired.

Excessive noise or clunking over bumps

Check all mounting bolts and bushings for proper torque and signs of wear.

Vehicle feels floaty despite the upgrade

Verify that the shock absorber is the correct part number for your specific vehicle sub-model and check for secondary suspension issues like worn sway bar links.

Pros and Cons

Pros

  • Improved handling and stability without harsh ride quality
  • Completely passive system avoids electronic failure points
  • Reduces body roll during cornering and braking
  • Durable coating resists corrosion from road elements
  • Seamlessly adapts to changing road textures

Cons

  • Not adjustable for track-specific setups
  • Requires professional installation for optimal safety
  • Higher initial cost compared to standard replacement shock absorbers

Setup, Compatibility & Care

Installation of the 8245-1357 should be performed by a qualified mechanic, as it involves the removal and replacement of existing rear suspension components. Always ensure the mounting hardware is tightened to the manufacturer's specified torque settings. Since these are high-performance hydraulic units, avoid using an impact wrench on the piston rod during assembly, as this can damage the internal seals. For long-term care, regularly inspect the protective dust boots to ensure they are not torn or missing, as debris entering the seal area can accelerate wear. Keep the area around the shock absorber clean of excessive road grime to maximize the lifespan of the protective surface treatment.

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