Dorman 911-977 | Secondary Air Injection Check Valve

Part Number
Secondary A.I.R. Combination Valve

Fits: 99-00 BMW 528i, 01-03 BMW 525i, 01-03 BMW 530i

Special Price $76.57 Regular Price $90.08
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This secondary air injection check valve is designed to match the fit and function of the original valve on specified vehicles, and is engineered for durability and reliable performance.

BRAND: Dorman - OE Solutions


  • BMW 525i 2003-01, BMW 528i 2000-99, BMW 530i 2003-01
  • Durable construction - this part is made from quality materials to ensure reliable performance and long service life
  • Restores functionality - this valve is made to fit and fully restore part functionality after the original valve fails
  • Trustworthy quality - backed by team of product experts in the United States and more than a century of automotive experience
  • Secondary A.I.R. Combination Valve
  • Secondary, Air, Injection, Check, Valve, valves
  • Direct replacement - this secondary air injection check valve is designed to match the fit and function of the original valve on specified vehicles


Inlet Size (in)0.83 in
MaterialCast Aluminum
Maximum Pressure Rating (psi)50 PSI
Outlet Size (in)0.83 in
Package Contents1 Secondary Air Injection Control Valve; 1 Gasket
Valve TypeReed Valve
Working Temperature Range-40C To 125C

Packaging Type: Box



  • BMW: 11727540468
  • BWD: EC1353


  • 1999-2000 BMW 528i - Position: N/A
  • 2001-2003 BMW 530i - Position: N/A
  • 2001-2003 BMW 525i - Position: N/A
Customer Questions
Can I use Dorman parts to replace OEM parts?
Yes, Dorman parts can often be used as replacements for OEM parts, but it is important to carefully compare specifications and ensure compatibility.
How do I install Dorman shift linkage bushing?
To install a Dorman shift linkage bushing, first locate the old bushing and remove it if necessary. Apply lubricant to the Dorman bushing and slide it onto the shift linkage, tapping it into place with a soft tool until fully seated. Check the alignment and function of the shift linkage after installation.
Where is Dorman manufactured?
Dorman is a global automotive parts supplier with manufacturing facilities in the United States, Mexico, Canada, China, and India. Its headquarters and largest manufacturing facility are located in Colmar, Pennsylvania, USA.
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