HomeSuspension > Suspension, Springs and Related ComponentsUnity 15-521001 Air Suspension Spring - Rear Left
Part #: 15-521001

Unity 15-521001 Air Suspension Spring - Rear Left

Rear Left
⚙️ 18 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Mercedes-Benz, C300, C400, C43 AMG, C450 AMG, and C63 AMG
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Reliable Air Suspension Spring for Mercedes-Benz Models

The Unity 15-521001 air suspension spring is designed to restore and maintain optimal ride quality for select Mercedes-Benz vehicles. Engineered for precision fitment, this component supports smooth handling and consistent vehicle height for models including the C43 AMG, C63 AMG, C300, C400, and C450 AMG.

  • Compatible with Mercedes-Benz C43 AMG, C63 AMG, C300, C400, and C450 AMG
  • Part number 15-521001 ensures exact replacement fit
  • Durable air suspension spring designed for reliable performance
  • Supports vehicle stability and ride comfort
  • Manufactured by Unity for consistent quality

Product Details and Specifications

This Unity air suspension spring (part number 15-521001) is engineered to meet the specific suspension requirements of various Mercedes-Benz models. It replaces the original air spring to maintain proper vehicle height and suspension responsiveness. The component is constructed to withstand the stresses of daily driving while providing consistent air pressure support within the suspension system. This part is essential for vehicles equipped with air suspension systems that require precise air spring replacement to avoid uneven ride height or compromised handling.

Common Applications and Problem Solving

  • Restores proper ride height on Mercedes-Benz C43 AMG, C63 AMG, C300, C400, and C450 AMG
  • Addresses air suspension sagging or uneven vehicle stance
  • Replaces worn or leaking air springs to prevent suspension noise and rough ride
  • Improves handling stability and comfort by maintaining correct air pressure
  • Prevents further suspension component wear caused by faulty air springs

Installation Notes and Tips

Installation of the Unity 15-521001 air suspension spring should be performed by a qualified technician familiar with Mercedes-Benz air suspension systems. Proper handling of the air spring is critical to avoid damage during installation. It is recommended to inspect related suspension components such as compressors and valves during replacement to ensure overall system integrity. Calibration or system reset may be required after installation to restore normal suspension operation.

Quality Assurance and Warranty

Unity manufactures this air suspension spring to meet industry standards for durability and performance. While specific warranty details are not provided, Unity products typically undergo quality control testing to ensure reliability. Using the correct part number 15-521001 guarantees compatibility and helps maintain the original suspension system’s functionality on Mercedes-Benz C43 AMG, C63 AMG, C300, C400, and C450 AMG models.

This part fits 18 vehicles. Search below:

YearMakeModelDrive TypePositionNotes
2020Mercedes-BenzC300AWDRear Left4MATIC Models Only
2020Mercedes-BenzC43 AMGAWDRear Left4MATIC Models Only
2020Mercedes-BenzC63 AMGRear Left
2019Mercedes-BenzC300AWDRear Left4MATIC Models Only
2019Mercedes-BenzC43 AMGAWDRear Left4MATIC Models Only
2019Mercedes-BenzC63 AMGRear Left
2018Mercedes-BenzC300AWDRear Left4MATIC Models Only
2018Mercedes-BenzC43 AMGAWDRear Left4MATIC Models Only
2018Mercedes-BenzC63 AMGRear Left
2017Mercedes-BenzC300AWDRear Left4MATIC Models Only
2017Mercedes-BenzC43 AMGAWDRear Left4MATIC Models Only
2017Mercedes-BenzC63 AMGRear Left
2016Mercedes-BenzC300AWDRear Left4MATIC Models Only
2016Mercedes-BenzC450 AMGAWDRear Left4MATIC Models Only
2016Mercedes-BenzC63 AMGRear Left
2015Mercedes-BenzC300AWDRear Left4MATIC Models Only
2015Mercedes-BenzC400AWDRear Left4MATIC Models Only
2015Mercedes-BenzC63 AMGRear Left

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