Mercedes Sprinter Turbo Air Intake Seal Ring – Elring | NCV3 3.0L OM642 | #0179970445 (2007–2012)

A cracked or missing turbo air intake seal ring on a NCV3 Sprinter creates an unmetered air leak between the intake duct and turbocharger inlet — causing boost loss, rough idle, sluggish throttle response, and under-boost fault codes that won't clear until the seal is replaced. This is the Elring turbo air intake seal ring for early NCV3 Sprinters equipped with the 3.0L OM642 V6 diesel engine, a direct replacement that restores a sealed, airtight connection at the turbocharger compressor inlet.

What This Part Does

The turbo air intake seal ring is a rubber or elastomeric sealing element that sits at the interface between the clean air intake duct and the turbocharger compressor housing inlet. It maintains an airtight seal that ensures all filtered air measured by the MAF sensor passes through the turbocharger compressor wheel before entering the intake manifold. This is a critical sealing point — any air that bypasses the turbocharger inlet at this junction is unmetered, meaning the ECU's fueling calculations receive inaccurate air mass data from the MAF sensor. The resulting air-to-fuel ratio error causes rough combustion, reduced boost, and fault codes. The seal is disturbed any time the intake duct is removed for air filter service, MAF sensor work, or turbocharger replacement, making it a mandatory replacement item during any intake or turbo service.

Common Symptoms of a Failing or Missing Intake Seal Ring

• Hissing or whooshing sound from the turbo inlet area under acceleration
• Loss of power or sluggish throttle response from unmetered air entering past the seal
• MAF sensor fault codes or air mass plausibility codes from inaccurate airflow measurement
• Under-boost codes from boost that is lower than commanded
• Rough idle or hesitation that developed after recent intake or turbo service

When to Replace

Replace any time the intake duct is removed — the seal degrades with each installation cycle and should never be reused after removal. Also replace when any of the above symptoms develop after intake or turbo service, as a forgotten or improperly seated seal is one of the most common sources of post-service intake leaks.

NCV3 OM642 Specific — VIN Verification Required

This seal ring is for early NCV3 Sprinters equipped with the 3.0L OM642 V6 diesel engine. Always verify your engine code and VIN before ordering. Contact us and we'll confirm fitment before you buy.

Fitment

• 2007–2012 Mercedes-Benz Sprinter 2500 – 3.0L OM642 (NCV3/W906)
• 2007–2012 Mercedes-Benz Sprinter 3500 – 3.0L OM642 (NCV3/W906)
• 2007–2012 Freightliner Sprinter 2500 / 3500 – 3.0L OM642 (NCV3)
• 2007–2009 Dodge Sprinter 2500 / 3500 – 3.0L OM642 (NCV3)

✔ Replace at every intake duct removal — never reuse the old seal
✔ Always verify VIN and model year before ordering

Part Numbers

• Mercedes OEM: 0179970445 / A0179970445 / 017-997-04-45
• Manufacturer: Elring
• SKU: 0179970445ELR