2015 — 2019
3.0L (B58B30) - 740i Inline-6 Saloon
Petrol
Check the coolant system health by inspecting the expansion tank and surrounding hoses for any crusty residue; the B58 engine is reliable, but plastic cooling components can fatigue as they age.
Listen carefully to the engine note during a cold start to ensure the Valvetronic system and turbocharger actuators are operating smoothly without any abnormal clicking or rattling.
Operate the iDrive controller and infotainment screen thoroughly while stationary to verify that the touch responsiveness and navigation loading times are consistent, as these systems can occasionally become sluggish over time.
Test the air suspension system by selecting the different drive modes; listen for any persistent compressor noise or uneven ride height leveling when shifting between Comfort and Sport settings.
Usually a good time to consider a transmission fluid flush to maintain long-term shifting smoothness.
A common interval to inspect the condition of suspension bushings and engine mounts for any signs of perishing.
Consider having the spark plugs and ignition coils serviced to ensure the B58 engine continues to run at its peak efficiency.
Verify the full service history, ideally prioritizing those that have been serviced by BMW specialists or main dealers.
Check the tire tread wear for uneven patterns, which can be an early indicator of alignment or suspension bushing fatigue.
Ensure the oil service intervals have been kept short; keeping up with regular oil changes is the best way to keep the B58 motor happy.
Confirm that the electronic parking brake engages and disengages silently and effectively during your stationary testing.
Inspect the brake rotors and pads for signs of heavy wear, as the performance nature of the 7 Series often means these parts work quite hard.
Estimated repair costs if issues arise
While the B58 engine is robust, the plastic cooling components can become brittle in our climate. It is worth keeping a buffer for potential hose or housing replacements down the line.
The air struts are designed for comfort, but they are a consumable item. Depending on the car's history, you might eventually need to budget for the replacement of an air spring or the compressor.
If this component needs attention in the future to keep your gear changes crisp, a full fluid and pan-filter service is a wise investment for longevity.
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Disclaimer: This report is generated with the assistance of AI analysis based on verified automotive data. While we strive for 100% accuracy, enthusiasts should always conduct physical inspections and consult service records. View Full Disclaimer