Some BMW 750Li owners report experiencing issues such as front speakers making a popping sound, which may be attributed to electrical problems, speaker damage, or connectivity issues. Additionally, some owners have reported a hard bang from the transmission while driving, indicating potential transmission problems, including harsh or delayed shifting and unusual noises during gear changes. Ignoring these transmission issues can lead to more severe damage, with repair costs ranging from $1,500 to $5,000 or more. Furthermore, the BMW 750Li is known for various common problems, including sluggish acceleration, transmission slipping, and engine oil leaks, particularly associated with the N63 engine, which may face timing chain failure and fuel injector issues. Given the complexity and potential costs of these problems, it is advisable for owners to seek professional inspection and repairs from a qualified mechanic or BMW specialist.

Some Buick LaCrosse owners report experiencing slow acceleration due to various potential issues, including clogged air filters, dirty mass air flow sensors, and clogged fuel filters. These problems can lead to sluggish starts and delayed responses when pressing the accelerator. Additionally, some owners have noted that jerking during acceleration may indicate a misfire, while reduced engine power in 2010 models can sometimes be improved by applying electric grease to the throttle body connector and gas pedal assembly electrical connectors. Furthermore, a weak battery or malfunctioning alternator may also contribute to acceleration problems. It is crucial for owners to consider these factors to effectively diagnose and resolve slow acceleration issues in their Buick LaCrosse.