The 1989 BMW M5 is a high-performance four-door sports sedan from the E28 generation, blending executive comfort with true motorsport engineering. It’s ideal for drivers who want a classic, analog driving experience with a manual gearbox and a high-revving inline-six, without giving up the practicality of a sedan. In the late 1980s market, it competed as a discreet “super sedan” with performance that rivaled many contemporary sports cars. The E28 M5 is also notable for its hand-built character and its place as the original M5 formula before the later E34 redesign took over in the early 1990s.

1) 3.5L DOHC inline-six (S38) performance: The 1989 M5 is powered by BMW’s S38 engine family, a high-strung, multi-throttle straight-six closely related to BMW’s M motorsport engines. Expect strong top-end power and a distinctive mechanical character compared to regular 5 Series models. 2) 5-speed manual transmission: A driver-focused 5-speed manual is central to the M5 experience, delivering direct engagement and excellent control over the engine’s power band. 3) Performance-tuned chassis: The M5 received sport-oriented suspension tuning and braking hardware designed for repeated high-speed use, helping it feel precise and planted for its era. 4) Classic E28 ergonomics and visibility: Thin pillars, a low cowl, and straightforward controls make it easy to place on the road—one reason enthusiasts still seek the E28 platform. 5) Understated sleeper styling: The 1989 M5 looks subtle compared to many modern performance sedans, which appeals to collectors and drivers who prefer a low-profile, classic design.

Shoppers searching “1989 BMW M5 problems,” “1989 BMW M5 reliability,” and “1989 BMW M5 common issues” should know this: the E28 M5 can be reliable when properly maintained, but it is not forgiving of neglect. Most issues are age-related and maintenance-driven, and repairs can be specialized. 1) Timing chain, guides, and tensioner wear: The S38 uses a timing chain system that can wear with mileage and age. Rattling on cold start, noisy upper timing components, or inconsistent idle can be warning signs. Many owners address timing components proactively around 120,000–180,000 miles depending on service history and usage. 2) Valve adjustment and valvetrain noise: The S38 requires periodic valve adjustments. Skipping this can lead to noisy operation, rough running, and accelerated wear. If a car idles unevenly or has excessive ticking beyond normal mechanical sound, confirm when valves were last adjusted. 3) Cooling system weak points: Like many older BMWs, overheating risk rises if the radiator, water pump, thermostat, or hoses are original or unknown. Plastic tanks and old hoses can fail without much warning, often after decades of heat cycles. Preventive cooling system refreshes are common on well-kept cars. 4) Electrical and charging gremlins: Aging grounds, tired alternators, old batteries, and brittle wiring can cause intermittent issues (dim lights, charging warning lights, inconsistent starting). Instrument cluster quirks and old relays can also create “phantom” problems that require careful diagnosis rather than parts swapping.