BMW F87 M2 — Known Issues

Overview

The F87 M2 (2016-2021) is BMW's compact M car, available with N55 (original M2) and S55 (M2 Competition/CS).

N55 M2 (2016-2018)

Cooling

• The M2's biggest weakness — cooling system is marginal for track use
• Oil temperature climbs quickly on track
• Coolant temperature can spike
• Essential upgrades for track: Oil cooler, upgraded radiator

Engine

• Standard N55 issues: valve cover/PCV, water pump, OFHG
• Higher stress than standard N55 applications
• Tuning potential: ~400 hp Stage 1, ~450 hp Stage 2

Differential

• Active M differential — electronic LSD
• Actuator motor can fail on high-mileage cars
• Fluid changes every 40-60k km

S55 M2 Competition (2018-2021)

Crank Hub

• Same S55 crank hub issue as M3/M4
• Must be fixed before any tuning
• Non-negotiable preventive maintenance

Charge Pipe

• Stock plastic charge pipe cracks under boost
• Aftermarket aluminum pipe recommended

Oil Consumption

• Some S55 units consume oil
• Monitor level regularly

M2 CS (2020)

• Limited production (2,200 units)
• S55 with 450 hp
• Lighter than Competition (carbon roof, lighter wheels)
• Already appreciating in value

Common to Both

• Rear subframe bushings — can wear with aggressive driving
• Exhaust valve actuator — can fail (no more valve control)
• Run-flat tires — most owners switch to PS4S or RE-71R

The Verdict

The M2 is one of the best M cars ever made. The N55 version is simpler and cheaper to maintain; the S55 Competition is faster but needs the crank hub fix. Both are incredible driver's cars.