The BMW E39 M5 represents a rare blend of brutal V8 power and refined daily usability. Under its polished composite hood lies the legendary S62B44 engine, a naturally aspirated 4.4-liter powerplant that delivers race-bred performance in a sedan many enthusiasts consider the peak of the M5 lineage.
With its hand-built construction and track-derived hardware, the E39 M5 set benchmarks for sport sedan dynamics that defined an era. This article breaks down the key specifications, driving dynamics, and ownership considerations for one of BMW’s most coveted performance machines.
| Model Year | Horsepower (hp) | Torque (lb-ft) | Drivetrain | 0–60 mph (seconds) |
|---|---|---|---|---|
| 1998 | 390 | 332 | RWD | 5.2 |
| 2000 | 400 | 343 | RWD | 4.9 |
| 2002 | 400 | 343 | S58B44 SMG | 4.6 |
| 2004 | 400 | 343 | RWD / SMG | 4.6 |
The S62B44 Engine and Power Delivery
Design and Construction
The S62B44 is a hand-assembled, all-aluminum DOHC V8 with four valves per cylinder and variable valve timing on both inlet and exhaust cams. Bore and stroke measure 4.094 by 3.386 inches, yielding a 4.4-liter displacement that is perfectly balanced for smoothness and high-rev performance. Unlike mass-produced engines, each S62 was built by skilled technicians, contributing to its crystalline sound and responsive throttle.
Power Figures and Torque Curve
BMW officially rated the E39 M5 at 390 horsepower in early models, later stepping up to 400 horsepower in 2000 MY and beyond. Peak torque sits at 343 lb-ft, available from just 2,500 rpm and lingering strongly through the redline. Power is delivered through a robust 6-speed manual or the optional SMG automated manual, which shifts with racecar precision thanks to an electro-pneumatic actuator and steering-wheel paddles.
Drivetrain Layout and Weight Distribution
Power flows to the rear wheels via a Getrag 420G gearbox and a conventional open differential, with a Torsen limited-slip option on later cars. The low-mounted engine and front-mounted gearbox create a near 50/50 weight distribution, giving the E39 M5 a balanced feel that inspires confidence at every speed. High-strength steel chassis components and adaptive M suspension ensure the power is transmitted to the road with remarkable composure.
Chassis Tuning and Handling Dynamics
Suspension Geometry and Spring Rates
BMW tailored the E39 M5 suspension with shorter front struts, a taller rear spring perch, and larger anti-roll bars than the standard 5-Series. These changes reduce body roll, sharpen turn-in, and maintain tire contact patch under aggressive cornering. The result is a sedan that feels more like a touring car than a luxury bruiser, with composed transient response and predictable oversteer limits.
Steering, Brakes, and High-Speed Stability
Quick-ratio power steering provides precise feedback, making tight parking maneuvers less stressful while still conveying useful road information. Massive 332 mm front and 310 mm rear discs with four-piston Brembo calipers inspire confidence during repeated hard stops. Combined with a low polar inertia chassis and excellent aerodynamics, the E39 M5 remains planted and stable during sweeping highway runs.
Interior Craftsmanship and Daily Usability
Materials, Fit, and Driver-Oriented Layout
Inside, the E39 M5 mixes premium leather, brushed aluminum, and deep-pile carpets with meticulous attention to panel gaps and switchgear texture. The driver-focused cockpit positions instruments and controls intuitively, while the flat-bottomed M steering wheel anchors aggressive inputs. Despite the performance focus, the rear seats offer surprising room for children or small adults, making this a practical choice for enthusiast families.
Technology and Comfort Features
Optional features such as parking sensors, a high-quality Harman/Kardon sound system, and advanced climate control enhance everyday convenience. The SMG gearbox, while controversial at launch, delivers rapid shifts and a sporty character that many drivers grow to appreciate. Modern updates in later model years include refined infotainment, upgraded lighting, and improved noise insulation, narrowing the gap between track weapon and refined grand tourer.
Maintenance, Reliability, and Mod Potential
Owning an E39 M5 means committing to higher-than-average maintenance costs, including premium fuel, synthetic oils, and performance tires. The complex SMG system and iDrive components can be expensive to repair if neglected, but many issues are preventable with consistent service records. With forged internals and careful tuning, the S62B44 platform can reliably support significant power increases, making it a favorite for track day builds and spirited back-road carving.
Key Takeaways for Enthusiasts
- Hand-built S62B44 V8 produces 390–400 horsepower with strong mid-range torque
- Rear-wheel drive and balanced weight distribution deliver precise handling
- Optional SMG gearbox offers lightning-fast shifts and racing flair
- Premium materials and driver-focused cockpit enhance daily usability
- Higher maintenance costs are offset by engaging dynamics and long-term value
FAQ
Reader questions
How much horsepower does the BMW E39 M5 actually produce?
Most E39 M5 models produce 390 or 400 horsepower depending on year and market, with peak power available across a broad mid-range. Later cars benefit from improved intake and exhaust, allowing the S62B44 to deliver consistent 400 hp output.
Is the E39 M5 suitable as a daily driver despite its performance pedigree?
Yes, many owners use the E39 M5 as a daily driver thanks to its refined ride, practical seating, and durable construction. Routine maintenance and attention to wear items are essential, but the car is forgiving and rewarding when cared for properly.
What common issues should I watch for when buying a used E39 M5?
Watch for SMG shudder, cooling system failures, rear main seal leaks, and suspension component wear. Regular service intervals, timely fluid changes, and inspections of steering and suspension links help prevent expensive repairs.
How does the E39 M5 compare to newer M5 models in terms of driving experience?
The E39 M5 offers raw mechanical feel, with hydraulic steering and naturally aspirated responsiveness that many enthusiasts prefer over newer turbocharged and electronically tuned rivals. While newer cars are faster in straight lines, the E39 often feels more connected and engaging on twisty roads.