This vacuum regulator hose with OE part number 11127578853 is designed for 2011–2012 BMW 740Li (Base, M Sport versions) with chassis E71/F01/F02 and 3.0T turbocharged engines, responsible for vacuum pressure transmission of the turbo regulator, and solves the problem of abnormal boost caused by cracking and leakage of the original hose.
Made from special rubber resistant to vacuum and oil penetration, this hose adapts to the high-temperature environment of the engine bay for a long time, without hardening, breaking, or micro-pressure leakage. The inner diameter and bending angle strictly replicate the original factory specifications, ensuring accurate transmission of vacuum pressure, and avoiding turbo boost runaway, insufficient boost pressure, acceleration stuttering, and exhaust noise failures.
This part supports direct in-situ disassembly and installation, no additional adjustment of the pipeline layout is required. The finished product has passed the negative pressure durability aging test, suitable for daily commuting, long-distance highway driving, and mild aggressive driving scenarios. It stabilizes the working condition of the turbo, optimizes the power output smoothness of the 3.0T engine, reduces abnormal wear of turbo parts, and is a reliable maintenance replacement for BMW N55 series engines.