2025 BMW 540i Engine Code Guide: Performance & Diagnostics

The 2025 BMW 540i continues to set benchmarks in performance and engineering, backed by precise engine codes that unlock its full potential—critical for owners, mechanics, and enthusiasts alike.

The 2025 BMW 540i features the B58 inline-six engine with updated engine codes like M54.6 and new OBD-II parameters optimized for emissions and performance. These codes enable advanced diagnostics, real-time monitoring, and enhanced VANOS and TwinPower Turbo technologies for improved throttle response and fuel efficiency.

Understanding engine codes such as P0172 and P0304 in the 2025 540i helps identify issues like fuel mixture imbalances or misfire cylinders. These codes empower precise repairs and performance tuning, especially when paired with BMW’s latest iDrive 8.5 system for seamless integration and diagnostics.

Owners and technicians leveraging the 2025 BMW 540i engine codes can fine-tune ECU settings, optimize turbo boost levels, and enhance turbo lag management—ensuring the 540i delivers its promised power and refinement with greater reliability.

Mastering the 2025 BMW 540i engine code is essential for unlocking peak performance, simplifying diagnostics, and ensuring long-term reliability. Stay ahead with expert guidance and tools to maintain your 540i at its best—whether you're on the road or in the garage.

These code systems help keep planning and development organized and avoids confusion. BMW engines are known by their M, N, B, S, P, or W codes while BMW chassis and bodies are known by their E, F, G, or U codes. BMW Engine Codes The engine codes used to be quite simple - M10 for four cylinder, M20 for small six cylinder, and M30 for the Big Six.

Read our 2026 BMW 5-Series review for information on ratings, pricing, specs, and features, and see how this sedan performed in our testing. 2025 540i xDrive Performance Figures Tested & Review by Car and Driver General BMW i5 and 5-Series (G60 / G61) Discussion. The BMW B58 is a turbocharged straight-six engine, which began production in 2015.

[1] The B58 replaced the N55 and was launched in the F30 340i. [2] The B58 is part of BMW's modular engine family, each engine using a displacement of 500 cc (30.5 cu in) per cylinder, following the B38 and B48 engine. [3] The B58 engine was named to Ward's World's 10 Best Engines five times, in 2016 (installed.

List of BMW Engines The table below includes the engine code, the number of cylinders, the engine volume, the number of valves, the horsepower range, torque, the BMW model of the motor on which it is installed, the time period of use of a particular engine and many other important information. Detailed specs and features for the 2025 BMW 5 Series 540i xDrive including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders, drivetrain and more. Specs of BMW 5 Series Sedan (G60) 540i (375 Hp) Mild Hybrid xDrive Steptronic /2023, 2024, 2025, 2026/.

2025 BMW 540I XDRIVE (3.0L 6 -cyl Engine Code B58B30M2 7 Turbo) Motor Oil, Filters and Lubricants - AMSOIL Unique poly-organic acid (OAT) formulation allows for use in a wide variety of vehicles Engineered to exceed original equipment manufacturer (OEM) requirements Protection up to 150,000 miles or 5 years, whichever comes first Ethylene glycol 50/50 pre. Learn the ins and outs about the new 2025 BMW 5 Series 540i xDrive Sedan. Find information on performance, specs, engine, safety and more.

Horsepower and Torque curve for 2025 BMW 540i xDrive (aut. 8) (279.6 kW / 380 PS / 375 hp). Data for the car edition of the year 2025 for North America.