BMW G30 5 Series — Early Issues

Overview

The G30 5 Series (2016-2023) is one of BMW's most refined sedans. Generally reliable, with fewer issues than the F10.

Engine

B48 (520i, 530i)

• Coolant loss — thermostat housing
• Otherwise very reliable
• No timing chain concerns

B58 (540i, M540i)

• Coolant loss — same thermostat issue
• Charge pipe on tuned cars
• Excellent reliability overall

N63TU2/TU3 V8 (550i, M550i)

• Much improved over earlier N63
• Minor oil consumption on some units
• Coolant system more robust
• Still the most expensive to maintain

B57 Diesel (520d, 530d, 540d)

• DPF with city driving
• AdBlue system faults
• EGR valve clogging
• Generally reliable for a diesel

Chassis

• Air suspension (if equipped) — still a wear item but improved
• Rear shock mounts — occasional creaking
• Run-flat tires — harsh ride, many owners switch to conventional

Electronics

• iDrive software bugs — early software had glitches, resolved via updates
• Wireless CarPlay — occasional disconnects
• Gesture control — can be triggered accidentally
• Display key — battery drains quickly
• Parking assistant — false warnings

48V Mild Hybrid (2020+)

• Starter-generator can have issues
• 48V battery located in trunk
• Generally reliable but adds complexity

Best Buy

The B58 540i/M540i is the sweet spot — powerful, refined, reliable, and very tunable. The B48 530i is the sensible choice for lower running costs.