HomeSuspension > Shocks and StrutsKYB KG9004 Suspension Strut - Rear
Part #: KG9004

KYB KG9004 Suspension Strut - Rear

Gas-a-just, Rear
7 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$77.41Free Shipping
Free ShippingNo Cost to Continental U.S.
Free Returns*Wrong fit? No cost
60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
Gas-a-just, Rear
Fitment: BMW, 320i
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Overview of KYB Gas-a-just Suspension Strut KG9004

The KYB Gas-a-just suspension strut KG9004 is engineered for precise fitment on BMW 320i models. Designed to restore original handling and ride quality, this strut offers reliable performance with key features tailored to suspension needs.

  • Compressed length: 14.21 inches
  • Extended length: 21.57 inches
  • Stroke length: 7.36 inches
  • Lower mount type: E2(10x45)
  • Upper mount type: S1
  • Includes dust cover for protection
  • Equipped with B-stop and R-stop bumpers
  • No internal rebound spring

Detailed Product Features and Specifications

The KYB Gas-a-just KG9004 suspension strut is designed with a compressed length of 14.21 inches and an extended length of 21.57 inches, providing a stroke length of 7.36 inches. This ensures smooth suspension travel and consistent damping performance. The lower mount uses an E2(10x45) type, while the upper mount is an S1 type, matching the original equipment specifications for the BMW 320i. The inclusion of a dust cover helps protect the strut shaft from debris and contaminants, extending the service life of the component. Additionally, the strut features both B-stop and R-stop bumpers to prevent over-compression and over-extension, safeguarding the suspension system during operation. Notably, this model does not include an internal rebound spring, which aligns with the design requirements for this vehicle application.

About the KYB Gas-a-just Product Line

The Gas-a-just line from KYB focuses on gas-charged struts that provide consistent damping and improved ride control. This product line is engineered to meet or exceed original equipment standards, offering a balance of comfort and handling. The KG9004 strut is part of this line, delivering reliable performance specifically calibrated for the BMW 320i suspension system.

Common Applications and Problem Solving

  • Restores factory ride height and suspension travel on BMW 320i
  • Reduces excessive body roll and improves handling stability
  • Eliminates noise and vibration caused by worn or damaged struts
  • Prevents suspension bottoming out with integrated bump stops
  • Protects suspension components from premature wear due to dust and debris

Installation Notes and Tips

When installing the KYB Gas-a-just KG9004 suspension strut, ensure compatibility with BMW 320i models by verifying mount types and dimensions. Use proper tools to avoid damage to the dust cover and mounting points. It is recommended to replace struts in pairs to maintain balanced suspension performance. After installation, a professional wheel alignment is advised to optimize handling and tire wear.

Quality Assurance and Warranty

KYB manufactures the Gas-a-just KG9004 strut to meet strict quality standards, ensuring durability and consistent performance. This part is backed by KYB's limited warranty, covering defects in materials and workmanship under normal use. Refer to KYB's official warranty documentation for specific terms and conditions.

BrandKYB
Part NumberKG9004
PositionGas-a-just, Rear
B-stopY
Compressed Length14.21
Dust Cover IncludedY
Extended Length21.57
Lower Mount TypeE2(10X45)
R-stopY
Stroke Length7.36
Upper Mount TypeS1

This part fits 7 vehicles. Search below:

YearMakeModelPositionNotes
1983BMW320iRearRecommended OEM Replacement; (E21); The KYB replacement unit comes with a new dustcover / bumper assembly.; Gas-a-just
1982BMW320iRearRecommended OEM Replacement; (E21); The KYB replacement unit comes with a new dustcover / bumper assembly.; Gas-a-just
1981BMW320iRearRecommended OEM Replacement; (E21); The KYB replacement unit comes with a new dustcover / bumper assembly.; Gas-a-just
1980BMW320iRearRecommended OEM Replacement; (E21); The KYB replacement unit comes with a new dustcover / bumper assembly.; Gas-a-just
1979BMW320iRearRecommended OEM Replacement; (E21); The KYB replacement unit comes with a new dustcover / bumper assembly.; Gas-a-just
1978BMW320iRearRecommended OEM Replacement; (E21); The KYB replacement unit comes with a new dustcover / bumper assembly.; Gas-a-just
1977BMW320iRearRecommended OEM Replacement; (E21); The KYB replacement unit comes with a new dustcover / bumper assembly.; Gas-a-just

* 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:

G51007

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