2019 BMW M4
2019 BMW M4
Overview
The 2019 BMW M4, a high-performance variant of the 4 Series coupe, is generally regarded as a reliable vehicle, especially considering its potent twin-turbocharged inline-six engine and sophisticated engineering. Owners often praise its exhilarating driving dynamics and premium interior. However, like any performance car, it can be susceptible to specific issues related to its high-strung powertrain and advanced systems. This analysis focuses on documented, non-wear-and-tear related reliability concerns across key automotive systems, providing insights for potential owners and current custodians.
Engine
3.0L Twin-Turbocharged Inline-6 (S55)
Rod Bearing Failure
- Symptoms: Knocking or rattling noise from the engine, especially under load; potential loss of oil pressure.
- Solution: Replacement of rod bearings. Early detection and preventative maintenance are crucial.
- Cost: $1,500 - $3,000
Turbocharger Issues
- Symptoms: Reduced engine power, whistling noises, increased exhaust smoke, check engine light.
- Solution: Repair or replacement of turbocharger(s).
- Cost: $2,000 - $4,500
Cooling System Leaks
- Symptoms: Overheating, coolant loss, visible leaks from hoses or radiator.
- Solution: Replacement of leaking hoses, radiator, or water pump.
- Cost: $500 - $1,200
Transmission
7-Speed M-DCT (Dual-Clutch Transmission)
Mechatronics Unit Failure
- Symptoms: Erratic shifting, transmission warning lights, inability to engage gears.
- Solution: Repair or replacement of the mechatronics unit.
- Cost: $2,500 - $5,000
Clutch Pack Wear
- Symptoms: Jerky shifting, slipping gears, delayed engagement.
- Solution: Replacement of clutch packs.
- Cost: $2,000 - $4,000
6-Speed Manual Transmission
No widespread issues reported.
- Symptoms: N/A
- Solution: N/A
- Cost: Varies
Suspension
Adaptive M Suspension
Electronic Damper Malfunction
- Symptoms: Harsh ride, clunking noises, suspension warning lights, loss of adjustable damping.
- Solution: Replacement of faulty electronic dampers.
- Cost: $800 - $1,500 per corner
Electrical
Infotainment System
iDrive Glitches
- Symptoms: Screen freezing, unresponsiveness, Bluetooth connectivity issues, navigation errors.
- Solution: Software updates, module reset, or replacement of the iDrive control unit.
- Cost: $300 - $1,000
Battery Drain
No major issues reported for this configuration.
Exterior
No Major Issues
No widespread issues reported.
- Symptoms: N/A
- Solution: N/A
- Cost: Varies
Interior
No Major Issues
No widespread issues reported.
- Symptoms: N/A
- Solution: N/A
- Cost: Varies
Summary Verdict
The 2019 BMW M4 offers a compelling blend of performance and luxury, with its core mechanical components generally proving robust. However, potential buyers and owners should be aware of specific vulnerabilities, particularly concerning the high-performance S55 engine’s rod bearings and turbochargers, and the M-DCT transmission’s mechatronics unit. Electrical gremlins, such as iDrive system glitches and battery drain, can also occur. While the manual transmission and exterior/interior elements are typically reliable, proactive maintenance and awareness of these potential issues are recommended to ensure a positive ownership experience.