Driver Left Air Injection Check Valve for Mercedes C230 C280 C300 CLK350 GLK350

Air Injection Check Valve for Mercedes Driver Left Side

This driver left air injection check valve controls secondary air flow into the exhaust system, and it is a direct replacement for the valve found on several Mercedes models.

Overview

This air injection check valve is a secondary air system component that regulates airflow into the exhaust manifold during cold starts. It helps reduce emissions and supports proper engine warm-up on compatible Mercedes vehicles. The valve installs on the driver left side and is intended for owners replacing a failed or leaking check valve.

Built For Performance

• Constructed to seal against exhaust backflow in the secondary air circuit
• Driver left side placement matches the factory mounting location
• Designed for direct replacement of the original check valve
• Metal body suited to the heat and pressure of the air injection system
• Helps maintain proper secondary air flow for emissions compliance

Fits These Machines

• for Mercedes C230
• for Mercedes C280
• for Mercedes C300
• for Mercedes CLK350
• for Mercedes GLK350

On-The-Job Use

• Replacing a check valve that leaks or fails to seal
• Restoring secondary air flow after a cold-start emissions fault
• Routine maintenance on the air injection system
• Fixing exhaust rumble caused by a stuck check valve

Specs At A Glance

Good To Know

Q: What does this check valve do? A: It allows secondary air into the exhaust during cold starts while blocking exhaust backflow. A failed valve can trigger check engine codes or cause rough running.

Q: Should I replace both sides at once? A: This listing covers the driver left valve only. Inspect the opposite side and replace it separately if it shows leaks or faults.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.