BMW 550e xDrive Steering Gearbox with a high ratio delivers instant and fluid steering response, allowing drivers to precisely place the sedan with reduced effort. The recirculating ball arrangement inside the Steering Gearbox features a worm gear, ball nut, and sector shaft immersed in pressurized fluid to reduce friction and eliminate slop, enabling a crisp and immediate front tire response to each turn of the wheel. The 550e xDrive comes with extra weight for hybrid, which is why the Steering Gearbox uses a hydraulic assist valve. This valve measures the torsion bar twist and delivers muscle only as needed, thus improving efficiency and cutting waste. The electrified powertrain can deliver strong torque, which is handled well by the system without causing instability at the front on rapid launches and switching lanes at high speed. Owners love that the Steering Gearbox can handle heavier loads more easily than lighter rack setups, which contributes to long-term reliability on pothole-strewn streets. From early production to the recent plug-in model, every 550e xDrive accepts this same common Steering Gearbox design. This means that replacement or adjustment procedures will be the same, and parts compatibility will remain wide. Every now and then, with the use of a special tool, a check on the fluid is done to make sure there is no rare seal leak. With minor preload adjustments, the faint play that sets in after high mileage use can be removed, keeping the tight feel that characterizes BMW handling intact. The Steering Gearbox consistently delivers assistance, resulting in greater safety since only minimal steering input is required for evading maneuvers without overloading the electronic aids. The Steering Gearbox has a compact housing, self-lubricating ball guides, and a wide adjustment range. These features make it highly durable and support the premium performance of the 550e xDrive. BMW makes the Steering Gearbox common across all 550e xDrive variants, so whether driving the standard BMW model or an M Sport-flavored BMW build, steering feel remains the same and future BMW updates will still focus on this well-engineered part, including the 550e xDrive that's up next.
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