BMW Diesel Turbo Pressure Converter Valve / Boost Control Solenoid (N75) OE Replacement 11658509323; Replaces 11657808032 11657811814 11747796338 Fits N47 N57 B47 B57 1 2 3 4 5 6 7 Series X1 X2 X3 X4 X5 X6

Restore strong, consistent boost on your BMW diesel with this OE-spec charge pressure control valve. This brand new electro-pneumatic vacuum regulator delivers precise turbo actuator management for smooth acceleration and reliable torque. A direct, plug-in replacement for tired original units that cause boost cut, limp-home behaviour and inconsistent performance.

Main BMW reference: 11658509323

Supersedes: 11657808032, 11657811814, 11747796338

Why this replacement valve is a smart fix

• Exact-fit when matched by BMW part number
• Stabilises charge pressure for crisp throttle response
• Resolves vacuum control issues that upset VNT or wastegate operation
• Proven in our own workshop with excellent feedback from customers

Typical issues this unit helps cure

• Low boost or excessive boost
• Limp mode under load
• Surging or wavering boost pressure
• Turbo actuator not moving or responding correctly

Also known as

Charge pressure solenoid, vacuum boost regulator, turbo actuator control valve, VNT control solenoid, wastegate regulator, turbo vacuum modulator, electrovalve.

Cross-reference numbers

• 11 65 8 509 323 - 11658509323
• 11 65 7 808 032 - 11657808032
• 11 65 7 811 814 - 11657811814
• 11 74 7 796 338 - 11747796338
• 77 96 3 38 - 7796338
• 78 08 0 32 - 7808032
• 78 11 8 14 - 7811814
• 85 09 3 23 - 8509323

Compatible engines and BMW models

Suitable across a wide range of BMW diesel platforms running N47, N47S, N47S1, B47, M57N2, N57S, N57Z, N57X, B57, B57S. Match by part number for absolute accuracy.

Fitting and support

Professional installation is recommended. For hassle-free fitting, book with MJ Modifications in Warwickshire or request a quote at info@mjmodifications.co.uk. Please confirm by part number before ordering.

Buy with confidence

We have installed these in our own workshop and customers have been thrilled with the restored performance and reliability. If you are chasing boost-related faults, replacing the vacuum converter is a fast, cost-effective solution.

People often search for

BMW charge pressure valve, turbo vacuum regulator BMW, actuator solenoid for BMW diesel, VNT control valve BMW, wastegate solenoid BMW, BMW 11658509323 valve, replacement for 11657808032 11657811814 11747796338, BMW 123d 125d 225d 325d 335d 425d 435d 525d 535d 540d 640d 740d X1 25d X2 25d X3 35d X4 35d X5 40d X6 40d boost valve.