HomeSuspension > Shocks and StrutsKYB 340100 Suspension Strut - Front Left
Part #: 503-0121

KYB 340100 Suspension Strut - Front Left

Excel-G
8 vehicles fit this part
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Excel-G
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Overview of KYB Excel-G Suspension Strut 340100

The KYB Excel-G Suspension Strut 340100 is engineered for reliable performance and precise fitment on select Infiniti models. Designed to restore original handling and control, this strut is compatible with Infiniti EX35, EX37, and QX50 vehicles, ensuring a tailored suspension upgrade.

  • Compressed length: 11.88 inches
  • Extended length: 13.83 inches
  • Stroke length: 1.95 inches
  • Upper mount type: 12x1.25
  • Internal rebound spring included
  • Right stop (R-stop) feature included
  • No dust cover or B-stop included

Detailed Product Features and Specifications

This KYB Excel-G strut (part number 340100) features a compressed length of 11.88 inches and an extended length of 13.83 inches, providing the precise stroke length of 1.95 inches necessary for optimal suspension travel. The upper mount type is specified as 12x1.25, ensuring compatibility with the mounting hardware on Infiniti EX35, EX37, and QX50 models. The strut includes an internal rebound spring, which helps maintain consistent damping performance and vehicle stability. Additionally, the right stop (R-stop) is incorporated to control the strut's extension, while the absence of a dust cover and B-stop indicates a design focused on core suspension functionality without additional protective components.

About the KYB Excel-G Product Line

The Excel-G line by KYB is designed to provide a balance between comfort and control by restoring original equipment ride quality. This product line focuses on delivering reliable damping performance with internal rebound springs to improve handling and reduce body roll. The Excel-G struts are engineered to meet or exceed OEM specifications, making them suitable replacements for factory-installed suspension components on compatible vehicles such as the Infiniti EX35, EX37, and QX50.

Common Applications and Problem Resolution

  • Restores factory ride quality and handling characteristics on Infiniti EX35, EX37, and QX50
  • Addresses excessive body bounce and poor road control
  • Reduces uneven tire wear caused by worn suspension components
  • Eliminates noise and vibration from failing struts
  • Improves vehicle stability during cornering and braking

Installation Notes and Tips

When installing the KYB Excel-G Suspension Strut 340100, ensure the upper mount type 12x1.25 matches the vehicle’s mounting hardware. It is recommended to replace struts in pairs to maintain balanced suspension performance. Since this strut does not include a dust cover, inspect the vehicle’s existing dust protection and replace if necessary. Proper torque specifications should be followed to secure the strut assembly, and alignment should be checked after installation to ensure optimal handling.

Quality Assurance and Warranty

KYB manufactures the Excel-G strut line to meet stringent quality standards, ensuring durability and consistent performance. The internal rebound spring design contributes to long-lasting damping efficiency. While specific warranty details for part number 340100 should be confirmed with the supplier, KYB typically offers limited warranties covering defects in materials and workmanship for their suspension components.

BrandBBB Industries
Part Number503-0121
PositionExcel-G
Inlet SizeM18X1.50
Input Shaft Diameter0.72
Input Shaft Diameter18.29
Input Shaft Spline Count26
Installation Kit IncludedYes
Manual or PowerElectric
New or RemanufacturedRemanufactured
Number of Mounting Holes4
Outlet SizeM16X1.50
Output Shaft Diameter1.25
Output Shaft Diameter31.75
Output Shaft Spline Count9
Pressure Port Thread SizeM18X1.50
Return Port Thread SizeM16X1.50
Turns Lock To Lock3.375

This part fits 8 vehicles. Search below:

YearMakeModelDrive TypePositionNotes
2015INFINITIQX50AWDFront LeftReplace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G
2014INFINITIQX50AWDFront LeftReplace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G
2013INFINITIEX37AWDFront LeftReplace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G
2012INFINITIEX35AWDFront LeftReplace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G
2011INFINITIEX35AWDFront LeftReplace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G
2010INFINITIEX35AWDFront LeftReplace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G
2009INFINITIEX35AWDFront LeftReplace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G
2008INFINITIEX35AWDFront LeftReplace suspension strut and coil spring assembly according to manufacturer's instructions.; Excel-G

* 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:

193213697846959

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