BMW M5 E39 M5 Parts

Ask any serious Bimmer enthusiast to name the greatest driver's car BMW ever built, and the E39 M5 will come up every single time. Produced from 1998 to 2003 - with US market deliveries running 2000 through 2003 - this car remains the gold standard of the sport sedan formula. It did something no M5 before or since has quite managed: it wrapped genuine supercar performance in a suit that could pass for a refined executive cruiser. No turbos, no hybrid assist, no launch control. Just 394 horsepower, a naturally aspirated V8, and one of the greatest engines BMW's Motorsport division ever signed off on.

The heart of the E39 M5 is the S62B50 - a 4.9-liter DOHC V8 with individual throttle bodies, a 7,750 RPM redline, and a mechanical character that modern M cars simply can't replicate. Where the N54 crowd chases boost curves and flash tunes, S62 owners chase throttle response and engine harmonics. The S62 uses a dual-VANOS system, a lightweight aluminum block and heads, and dry-sump lubrication - genuine motorsport architecture carried over into a road car. It's a high-revving, naturally aspirated engine that rewards proper technique and punishes neglect. Treat it right and it'll run well past 200,000 miles. Ignore the maintenance intervals and it will remind you - expensively - that it's still an M engine.

Before you start talking exhaust systems or suspension geometry, the S62 has a maintenance hierarchy you need to respect. First on any used E39 M5 is a full VANOS rebuild. The seals on the dual-VANOS unit degrade with age and heat cycles, causing rough cold starts, flat spots in the mid-range power delivery, and a general dulling of the S62's character. Beisan Systems is the trusted name here - their rebuild kit is a straightforward DIY for anyone comfortable with engine work and makes an immediately noticeable difference in throttle response and idle quality.

Next, address the rod bearings. Like the S85 in the E60 M5, the S62's rod bearings are a known wear item - not catastrophic by reputation, but worth inspecting and replacing with quality ACL or King bearing sets during any bottom-end service. Cooling system components are next: the plastic thermostat housing, water pump, and expansion tank are all age-sensitive and should be replaced as a set regardless of appearance. A coolant failure at temperature on a track day is not a scenario you want to experience firsthand. Round out your baseline with fresh Genuine BMW or Pentosin fluids, a throttle body sync, and a full differential fluid service - the E39 M5 runs a mechanical limited-slip diff that responds noticeably to fresh fluid.

Structurally, inspect the rear subframe mounting points. The E39 platform, especially under M5 stress loads, can develop cracking in the unibody around the rear subframe mounts. Catching this early with reinforcement plates is far cheaper than addressing it after failure. Check the suspension page for subframe reinforcement kits we carry specifically for this platform.

The E39 M5 mod community is more measured than the boost-hungry crowds around newer platforms, and that's a feature, not a bug. Because the S62 is naturally aspirated, there's no single "tune and done" shortcut. Power gains come through breathing improvements, weight reduction, and chassis refinement - and that tends to produce a more satisfying result anyway.

For a street-focused build, start with exhaust work. A quality cat-back from Dinan, Active Autowerke, or Eisenmann opens up the S62's upper-rev character significantly and gives you the soundtrack this engine deserves. Paired with a cold air intake and a throttle body service, you'll feel a real improvement in high-RPM pull without touching internal components. For the suspension, Bilstein PSS9 or Öhlins Road and Track coilovers are the benchmark - they transform the E39's already excellent chassis without making it punishing on real roads. Wrap it up with a quality wheel package from the Wheels & Tires section - the E39 M5 looks correct on a staggered 18-inch setup, and shedding unsprung weight here pays dividends everywhere.

Track-oriented builds take a different direction. Upgraded brake pads and fluid (Motul RBF600 minimum, Castrol SRF for serious use), stainless brake lines, and a quality big brake kit from AP Racing or Stoptech are foundational. Suspension alignment to BMW's Motorsport spec, stiffer front and rear sway bars, and a limited-slip diff rebuild bring the chassis closer to its full potential. If you're going further, the S62 responds well to ITB tuning and individual runner intake work - check the Engine section for component options. Lightweight Body & Aero additions like a carbon trunk lid or front splitter keep things period-correct while reducing mass where it matters.

The E39 M5 doesn't need to be transformed - it needs to be maintained, sorted, and respected. Do that, and you have one of the finest driver's machines ever to come out of Munich. There's a reason values have climbed steadily for over a decade, and it has nothing to do with nostalgia.