Top-down view of the installed engine with the ""M Power"" carbon fiber engine cover and charge cooler in place.
The white BMW M4 (Plate: YK17 TVM) raised on a two-post lift during the final stages of the build
The engine being lowered into the engine bay of the white BMW M4 with M-sport livery
The fully assembled S55 engine suspended by a crane, showing the alternator, AC compressor, and wiring harness.
Two S55 engine blocks mounted on engine stands in the workshop, showing the internal crank and cylinder structures.
Wide shot of the engine assembly area featuring specialized stands and a red tool chest.
Macro shot of the cylinder wall showing the cross-hatch pattern and the deck surface of the engine block.
Close-up focus on the compression and oil control rings fitted to the new pistons.
A close-up of four high-performance pistons with ""Mahle"" branding visible on the skirts, resting on Elring packaging.
Facing similar issues? Get Quote Now to bring your BMW back to peak performance.
Vehicle In: 01-Dec-2025
Vehicle Out: 05-Dec-2025
Turnaround Time: 4 Days
The vehicle was already extensively modified for track use, but was still running a standard factory engine and driveline. While the car remained drivable, the original unit was not ideally suited to sustained high-performance use. After assessment, an engine replacement was recommended to better support the vehicle’s track-focused setup.
Components we fitted:
Very low-mileage S55B30A engine supplied and fitted
New performance oil filters installed
Fresh BMW M-spec engine oil added
Ancillary components inspected and transferred where required
Engine systems checked and verified after installation
Full testing carried out under operating conditions
With the low-mileage BMW M4 engine installed, the vehicle now benefits from improved reliability and performance tailored for track use. Following thorough testing, the car was returned to the owner fully operational and ready for high-demand driving.
Facing similar issues? Get Quote Now to bring your BMW back to peak performance.
Vehicle In 20-Oct-2025
Vehicle Out 24-Oct-2025
Vehicle arrived with a knocking sound from the bottom end of the engine. Crankshaft and con rod bearing damage was found, requiring a complete BMW M4 engine Replacement.
Click to Discover More