HomeSuspension > Suspension, Springs and Related ComponentsWestar CK-7858 Air Spring to Coil Spring Conversion Kit - Rear
Part #: CK-7858

Westar CK-7858 Air Spring to Coil Spring Conversion Kit - Rear

Rear
⚙️ 20 vehicles fit this part
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Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$177.24Free Shipping
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🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
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✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: BMW, X5 and X6
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Reliable Air Spring to Coil Spring Conversion for BMW X5 and X6

The Westar CK-7858 Air Spring to Coil Spring Conversion Kit offers a durable and cost-effective solution for BMW X5 and X6 models experiencing air suspension issues. This kit replaces the original air suspension components with coil springs designed for improved reliability and long-term performance.

Key Features of the Westar CK-7858 Conversion Kit

  • All components are brand new; no re-manufactured parts included
  • Engineered as a more reliable alternative to OEM air suspension systems
  • Provides significant cost savings compared to OEM air spring replacements

Product Details and Benefits

The Westar CK-7858 conversion kit is specifically designed for BMW X5 and X6 vehicles, offering a practical alternative to the factory air suspension. By switching to coil springs, this kit eliminates common air suspension failures such as leaks and compressor issues. The new components ensure consistent ride height and handling characteristics while reducing maintenance needs. This conversion is ideal for owners seeking a dependable suspension upgrade without the higher costs associated with OEM air springs.

Common Issues Addressed by This Conversion Kit

  • Air spring leaks causing uneven ride height
  • Air compressor failures leading to suspension malfunctions
  • Expensive OEM air spring replacements
  • Unstable or inconsistent suspension performance
  • Frequent maintenance requirements of air suspension systems

Installation Notes and Tips

Installation of the Westar CK-7858 kit requires mechanical knowledge and appropriate tools. It is recommended to have the vehicle securely lifted and supported before beginning. Since this kit converts air suspension to coil springs, ensure all air suspension components are properly removed or disabled according to BMW service guidelines. Professional installation is advised to maintain vehicle safety and suspension integrity.

Quality Assurance and Warranty

Westar provides all new components in this conversion kit, ensuring quality and reliability. While specific warranty details are not provided, Westar products typically meet industry standards for durability and performance. Using new parts rather than re-manufactured units reduces the risk of premature failure and supports consistent suspension function.

BrandWestar
Part NumberCK-7858
Bullet 1All product are new, we do not sell re-manufactured units
Bullet 2Designed to be a more reliable alternative to the oem air suspens
Bullet 3Designed to be a significant cost savings over the oem style air

This part fits 20 vehicles. Search below:

YearMakeModelSubmodelPositionNotes
2014BMWX6Rear
2013BMWX5xDrive30iRear
2013BMWX6Rear
2012BMWX5xDrive30iRear
2012BMWX6Rear
2011BMWX5xDrive30iRear
2011BMWX6Rear
2010BMWX5xDrive30iRear
2010BMWX6Rear
2009BMWX53.0siRear
2009BMWX54.8i PremiumRear
2009BMWX5xDrive30iRear
2009BMWX6Rear
2008BMWX53.0siRear
2008BMWX54.8iRear
2008BMWX54.8i PremiumRear
2008BMWX6Rear
2007BMWX53.0siRear
2007BMWX54.8iRear
2007BMWX54.8i PremiumRear

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

251BW-30-R

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.