Mini Cooper severe engine misfire with low fuel pressure, leaking water pump, and rattling noise on Mini Cooper

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

Some Mini Cooper owners report experiencing severe engine misfires accompanied by low fuel pressure, which can lead to performance issues. These owners often find that low fuel pressure may necessitate checking the low pressure fuel pump, as it is critical for maintaining proper fuel pressure. Additionally, if coils and plugs have been inspected without resolution, some owners recommend examining the high pressure fuel pump, particularly when no error codes are present. Furthermore, some Mini Cooper owners report issues with leaking water pumps, which can cause coolant loss and overheating, potentially leading to serious engine damage if not addressed promptly. Others have noted a rattling noise that may indicate loose components or other engine problems, suggesting the need for a thorough inspection of the engine bay. It is advisable for owners facing these issues to seek assistance from a qualified mechanic or Mini Cooper specialist to ensure accurate diagnosis and resolution of these complex concerns.

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