Mercedes Sprinter Charge-Air Inlet Pipe / Resonator – Genuine Mercedes-Benz | NCV3 3.0L OM642 | #6421400000 (2010–2018)

A cracked or failed charge-air inlet pipe on a NCV3 Sprinter leaks pressurized air between the turbocharger outlet and the intercooler — causing boost loss, sluggish throttle response, under-boost fault codes, and increased induction noise that signals an unsealed charge air system. This is the Genuine Mercedes-Benz OEM charge-air inlet pipe with integrated resonator for NCV3 Sprinters equipped with the 3.0L OM642 V6 diesel engine, a direct replacement that restores a sealed hot-side charge air path and proper boost delivery to the intercooler.

What This Part Does

The charge-air inlet pipe routes compressed, hot-side air from the turbocharger compressor outlet to the intercooler inlet. On the OM642's charge air system, this pipe carries air that has just been pressurized by the turbo — it is at elevated temperature and pressure and must maintain an airtight seal between the turbo and intercooler under sustained boost loads. The integrated resonator chamber within the pipe body serves as an acoustic dampener that absorbs and cancels the pressure pulses and induction noise generated by the turbocharger at various boost levels, keeping the charge air system quieter under load. When the pipe cracks, splits at a fitting end, or its resonator body develops a fracture, pressurized charge air escapes — causing immediate and detectable boost loss.

Common Symptoms of a Failing Charge-Air Inlet Pipe

• Hissing or whooshing sound from the engine bay under acceleration — boost escaping at the crack
• Loss of power or sluggish throttle response, particularly under load at speed
• Under-boost fault codes or boost pressure plausibility codes from the ECU
• Black smoke under hard acceleration from an uncorrected air-to-fuel ratio caused by boost loss
• Increased induction noise — a sign the resonator chamber has been compromised
• Visible cracking, splitting, or deformation at the pipe body or fitting ends

When to Replace

Replace when the pipe is found cracked, split, or physically deformed. Also replace any time the charge air system is being inspected for a boost leak and this pipe shows surface cracking or end fitting degradation — a hairline crack that hasn't yet caused a full split will eventually fail under sustained boost. Always replace the intake seal ring (0179970445) at the turbocharger connection at the same time.

NCV3 OM642 Specific — VIN Verification Required

This charge-air inlet pipe is for NCV3 Sprinters equipped with the 3.0L OM642 V6 diesel engine. It is not compatible with NCV3 Sprinters equipped with the 2.1L OM651 or VS30 Sprinters. Always verify by VIN before ordering. Contact us and we'll confirm fitment before you buy.

Fitment

• 2010–2018 Mercedes-Benz Sprinter 2500 – 3.0L OM642 (NCV3/W906)
• 2010–2018 Mercedes-Benz Sprinter 3500 – 3.0L OM642 (NCV3/W906)
• 2010–2018 Freightliner Sprinter 2500 / 3500 – 3.0L OM642 (NCV3)

✔ Always replace intake seal ring (0179970445) at the turbocharger connection
✔ Always verify VIN — charge air pipe configurations vary by build date and engine spec

Part Numbers

• Mercedes OEM: 6421400000 / A6421400000 / 642-140-00-00
• Superseded by: 6421403187 / A6421403187
• Manufacturer: Genuine Mercedes-Benz
• SKU: 6421400000OE