Skip to product information
Left Secondary Air Injection Check Valve for Mercedes-Benz CL500 CLK320 CLK500 – Northline Parts

Left Secondary Air Injection Check Valve for Mercedes-Benz CL500 CLK320 CLK500

SKU: NLT2S01426
$207.69 In Stock
$207.69
Sale price  $207.69 Regular price 
Ships for free in 2–4 business days.
This left-side secondary air injection check valve is for matching Mercedes-Benz CL500, CLK320 and CLK500 emissions systems. It helps prevent exhaust gases from flowing backward into the air-injection plumbing.
Estimated delivery between
Shop at Northline Parts Best Customer Service Best Online Parts

Let Northline Parts Do the Heavy Lifting for You!

Not sure which part you need? Our team can help you find the right replacement.

Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT

Live Chat: Available 24/7

I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks

Edward H. — Verified customer

Compatible Models

We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.

Compatible equipment / model
  • Mercedes-Benz CL500 (left-side valve where equipped)
  • Mercedes-Benz CLK320 / CLK500 (matching secondary air system)

Product Overview

The secondary air system sends fresh air into the exhaust during certain cold-start conditions. A stuck check valve can allow hot exhaust to damage upstream hoses or the air pump, and may accompany a secondary-air fault code.

Key Features & Performance

  • Left-side secondary air check valve
  • Emissions-system part
  • One-way air-flow function

Common Reasons for Replacement

  • Secondary-air system fault codes
  • Exhaust leakage into injection hose
  • Damaged or carbon-stuck valve

Fitment Notes

Identify the bank/side, hose fittings and original valve number; some engines use different valves or only one valve.

Frequently Asked Questions

Is this an OEM part? No. Unless the listing explicitly states otherwise, this is an aftermarket replacement or accessory. Manufacturer names and OE numbers identify the intended application.

How do I confirm fitment? Identify the bank/side, hose fittings and original valve number; some engines use different valves or only one valve.

Part Summary

Keywords: Left Secondary Air Injection Check Valve, Mercedes-Benz CL500, Mercedes-Benz CLK320 / CLK500.

Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.

Customers also purchased