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Koni Special Active Shock Absorber - Rear - 8245-1423

Koni Special Active Shock Absorber - Rear - 8245-1423

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

Best current price£105.80from Demon Tweeks

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Demon TweeksKoni Special Active Shock Absorber - Rear
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£105.80
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eBayKoni Special Active Rear Shock Absorber (FSD) For Audi A4 & A5 - (8245-1407)
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Product Information

Full details

The Koni Special Active Shock Absorber (8245-1423) is an ideal upgrade for daily drivers and commuters seeking a balance between comfort and vehicle stability without the complexity of electronic systems. Utilizing Frequency Selective Damping (FSD) technology, these shocks automatically adjust to varying road conditions, providing a smoother ride on bumps while firming up during aggressive maneuvers. A key caveat is that these are passive mechanical units; they do not allow for manual driver-adjustable damping settings, meaning you cannot tune them to a specific stiffness preference.

All features

Model Part Number8245-1423
BrandKoni

Extended Product Information

FAQs

Do I need to wire these into my car's computer?

No. These are entirely mechanical, passive shock absorbers and do not require electrical connections or computer integration.

Will these change my vehicle's ride height?

No, these shock absorbers are designed to work with your vehicle's factory springs and are not intended to change the ride height.

Are these adjustable for stiffness?

No, the damping characteristics are automatically managed by the internal hydraulic valving based on road conditions.

Can I install these myself?

While technically possible for experienced mechanics, it is strongly recommended to have these installed by a professional to ensure safety, as suspension work involves handling high-tension springs.

How do these compare to factory shocks?

Koni Special Active shocks provide a more sophisticated ride quality by automatically adapting to road conditions, whereas standard factory shocks typically have a fixed damping rate.

Troubleshooting

Noticeable oil leak around the piston rod seal

The shock is failing and must be replaced; check for damaged rubber dust boots that may have allowed debris to score the seal.

Vehicle feels bouncy or unstable after installation

Verify that all mounting hardware is torqued to the vehicle manufacturer's specifications and ensure that the shock was correctly bled of air before installation.

Pros and Cons

Pros

  • Automatic, maintenance-free damping adjustment
  • Improved vehicle stability during cornering and braking
  • No electronic hardware or wiring required
  • Durable finish resistant to road salt and weather
  • Maintains ride comfort on rough surfaces

Cons

  • No manual damping or stiffness adjustment
  • Not suitable for dedicated track racing
  • Does not replace factory air-suspension components
  • Requires professional installation for safety

Setup, Compatibility & Care

The Koni 8245-1423 is designed as a direct-fit replacement for the rear suspension on compatible vehicle models. Because these units utilize passive technology, they do not require an ECU reset or diagnostic programming, making them simpler to install than active electronic shocks. Installation should be performed by a qualified technician using proper spring compressors and torque wrenches to ensure alignment and safety. Periodic maintenance involves visually inspecting the shock bodies for hydraulic leaks and ensuring the external protective coating remains intact. If you notice signs of corrosion due to extreme road conditions, cleaning the exterior with mild detergent and water can help prolong the finish, but avoid high-pressure washing directly into the seal areas.

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