The 2000 528i with the M52 2.8L inline-six is generally a solid chassis, but this generation E39 suffers from a handful of recurring weak points that can turn expensive quickly if ignored. The engine itself is durable when maintained, but cooling system, suspension bushings, and transmission support components wear predictably.
Cooling System Overhaul (Radiator, Expansion Tank, Hoses, Thermostat, Water Pump)
Common · high severityTypical onset: 80,000-120,000 mi
Symptoms: Coolant loss with no visible external leaks, Expansion tank cracks at seams or neck, Upper radiator hose or thermostat housing develops pinhole leaks, Temperature gauge climbs above midpoint under load
Fix: BMW used plastic extensively in cooling components that age poorly. A proper preventive overhaul means expansion tank, radiator, upper/lower hoses, thermostat + housing, water pump, and fresh coolant. Done right it's a 6-8 hour job at an indie shop. Delaying risks overheating and head gasket failure.
Estimated cost: $1,200-2,000
Front Control Arm Bushings and Thrust Arm Bushings
Common · medium severityTypical onset: 70,000-110,000 mi
Symptoms: Steering wander or vague on-center feel, Clunking over bumps from front suspension, Uneven inner tire wear, Vibration or shimmy during braking
Fix: The E39 front suspension uses rubber bushings in control arms and thrust arms that deteriorate and tear. Most shops replace entire arms rather than pressing bushings. Expect 4-6 hours labor for both sides plus alignment. OE-quality aftermarket parts (Lemförder, Meyle HD) are acceptable.
Estimated cost: $800-1,400
Transmission Oil Cooler Lines and External Cooler Leak
Occasional · high severityTypical onset: 100,000-150,000 mi
Symptoms: ATF puddle under engine bay, often passenger side, Transmission slipping or delayed engagement when hot, Burnt ATF smell, Low fluid warning if equipped
Fix: The automatic's external cooler and steel lines corrode or develop leaks at crimp fittings. Left unaddressed, the transmission runs low and burns clutches. Repair involves replacing cooler and lines, flushing, refilling with correct Dexron III. About 3-4 hours labor. Critical to catch early.
Estimated cost: $600-1,100
Valley Pan Gasket (Lower Intake Manifold Gasket) Oil Leak
Occasional · medium severityTypical onset: 120,000-180,000 mi
Symptoms: Oil pooling on top of transmission bell housing, Burning oil smell from exhaust heat, Slow oil consumption, drips after parked overnight, Oil residue along rear of engine block
Fix: The rubber valley pan gasket between cylinder heads hardens and seeps oil into the valley. Requires pulling the intake manifold, which means 6-8 hours of labor. Not an emergency but messy and annoying. Often done alongside valve cover gaskets if those are also weeping.
Estimated cost: $900-1,600
Window Regulator Failure
Common · low severityTypical onset: Any mileage—age-driven
Symptoms: Window drops into door or won't raise, Grinding or clicking noise when operating window switch, Window tilts or binds halfway up
Fix: Plastic regulator clips break, causing the window to fall or jam. Each door is about 1.5-2 hours labor. Aftermarket regulators are hit-or-miss; OEM or quality remanufactured units last longer. Common enough that many E39 owners have replaced at least one by now.
Estimated cost: $300-500 per door
Rear Subframe Mounts and Differential Bushings
Occasional · medium severityTypical onset: 100,000-150,000 mi
Symptoms: Clunking from rear on acceleration or deceleration, Vibration through chassis at highway speed, Excessive rear-end movement over bumps
Fix: Rubber mounts that locate the rear subframe and differential deteriorate, allowing the assembly to shift. Requires subframe drop and pressing or replacing mounts—about 4-6 hours labor depending on corrosion. Handling suffers noticeably when worn.
Estimated cost: $700-1,300
CCV (Crankcase Vent Valve) and PCV System Clogging
Common · medium severityTypical onset: 80,000-130,000 mi
Symptoms: Rough idle or hunting idle speed, Oil consumption increases, Oil in intake boot or throttle body, Check engine light for lean/rich codes or misfire
Fix: The M52 uses a crankcase vent valve integrated into the valve cover. When the diaphragm tears or the system clogs, crankcase pressure rises and oil gets sucked into the intake. Replacement involves new valve cover gasket, CCV, and often intake boot and hoses. About 3-4 hours labor.
Estimated cost: $600-1,000
Buy one if it has cooling and suspension records, but walk away from neglected examples—deferred maintenance spirals fast on E39s.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.