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

Brand Westar CK-7858
Position Rear
Bullet 1 All product are new, we do not sell re-manufactured units
Bullet 2 Designed to be a more reliable alternative to the oem air suspens
Bullet 3 Designed to be a significant cost savings over the oem style air
Fits BMW · 20 vehicles

New components only. Westar does not sell remanufactured units.

Reliable alternative. A more dependable choice than OEM air suspension.

Cost savings. Offers significant savings over OEM-style air suspension.

Cross-references Suncore 251BW-30-R for the same application. See all 1.

$178.01Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.

Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
Step 2 — Quantity
Order total $178.01
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.

Westar CK-7858 Rear Suspension Conversion Kit

Westar CK-7858 is an air spring to coil spring conversion kit for rear suspension service on select BMW X5 and BMW X6 models. It is built for owners replacing failing air suspension components with a more straightforward coil spring solution.

  • Fits 2007-2013 BMW X5, rear
  • Fits 2008-2014 BMW X6, rear
  • New product only; Westar does not sell remanufactured units
  • Engineered as a more reliable alternative to OEM air suspension
  • Built to deliver a lower-cost replacement path than OEM-style air suspension

Product Details

Westar CK-7858 is designed for rear suspension conversion on BMW X5 and BMW X6 applications where air suspension service is no longer the preferred repair path. Westar manufactures air suspension components to strict industry standards and uses quality materials in its production process. This part cross-references Suncore 251BW-30-R for the same application.

Common Repair Uses

  • Rear air suspension failure on a BMW X5
  • Rear air suspension failure on a BMW X6
  • Costly OEM air spring replacement needs
  • Repeated air suspension maintenance concerns
  • Conversion from air suspension to coil spring setup

Installation Notes

Verify rear fitment by model year before ordering. Compare the original suspension layout on the vehicle with the conversion kit application, and inspect related suspension components for wear during service. Professional installation is recommended for suspension work on BMW X5 and BMW X6 rear applications.

Quality Assurance

Westar states that its air suspension products are manufactured to strict industry standards, including ISO, QS, and TS standards. CK-7858 is supplied as a new part.

This part fits 20 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
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
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Suncore — 251BW-30-R