T5,T6 Turbo N75 Boost Control Valve - 1.9 TDI + 2.0 TDI + 2.5 TDI

High quality replacement turbo pressure converter valve, commonly known as the N75 or “moo valve,” designed to precisely control boost pressure on turbocharged engines across a wide range of Volkswagen models including Transporter, Caddy and Touareg platforms.

The N75 valve is an electro-pneumatic solenoid that regulates turbocharger boost by controlling vacuum or pressure sent to the turbo actuator. Working in conjunction with the ECU, it rapidly adjusts boost levels depending on throttle input, engine load and driving conditions. This ensures optimal performance, fuel efficiency and engine protection.

A failing N75 valve can cause common issues such as loss of power, overboost/underboost faults, limp mode, poor fuel economy or inconsistent acceleration. Replacing it restores correct turbo operation, smooth throttle response and reliable boost control.

Built with a durable solenoid design, this valve is engineered to withstand high temperatures, pressure fluctuations and continuous operation, making it ideal for both standard and demanding driving conditions.

Features

• Turbo boost pressure control valve (N75 / moo valve)
• Restores correct turbocharger boost regulation
• Improves throttle response and engine efficiency
• Durable construction for high temperature environments
• Direct replacement for original unit

Specifications

• Operating mode: Electric-pneumatic
• Valve type: Solenoid valve
• Voltage: 12V
• Number of pins: 2

How It Works
The N75 valve receives signals from the ECU and controls airflow/vacuum to the turbo actuator. By opening and closing rapidly, it adjusts the actuator position, which in turn controls turbo boost pressure. This maintains optimal boost levels for performance while preventing engine damage from excessive pressure.

Recommended Additional Parts

• Vacuum hoses (check for splits or leaks)
• Turbo actuator (if faulty)
• Boost pressure sensors (MAP sensor)
• Intercooler hoses and clips
• Diagnostic check to clear fault codes after installation

To Fit

Watercooled VW

• VW Transporter T5 – 2003–2015
  • 1.9 TDI (AXB, AXC, BRR, BRS)
  • 2.5 TDI (AXD, AXE, BLJ, BNZ, BPC)
• VW Transporter T6 – 2016–2019
  • 2.0 TDI (CCH, CFCA, CSDA, CAAA, CAAC, CXEB, CXFA, CXGA, CXGB, CXHA)
• VW Caddy Mk3 – 2004–2010
  • 2.0 SDI / TDI
• VW Golf Mk5 – 2004–2008
  • 2.0 TDI
• VW Touareg (7L) – 2003–2010
  • 2.5 TDI (163–174PS)
• VW Phaeton – 2002–2006
  • 5.0 V10 TDI
• VW Multivan / California T5 – 2003–2009
  • 1.9 TDI / 2.5 TDI