The E32 740i with the M60 V8 is a supremely comfortable highway cruiser undermined by catastrophic engine weaknesses and complex electronics. If the Nikasil issue hasn't been addressed, budget for a full engine rebuild or replacement.
Nikasil Cylinder Bore Failure (M60 V8)
Common · high severityTypical onset: 60,000-120,000 mi
Symptoms: Excessive oil consumption (quart every 500-1000 miles), White/blue smoke on cold start, Rough idle and misfires, Loss of compression in multiple cylinders
Fix: Early M60 blocks used Nikasil cylinder liners that corrode from sulfur in US fuel. Fix requires complete engine rebuild with Alusil block or sleeved cylinders (80-100 hours), or used/remanufactured engine swap (25-35 hours). Many engines grenaded between 60k-100k miles.
Estimated cost: $6,000-12,000
Valley Pan Gasket and Timing Chain Guides
Common · high severityTypical onset: 80,000-140,000 mi
Symptoms: Coolant leaking into valley between cylinder banks, Overheating with no external coolant leaks, Rattling noise on cold start (timing guides), Coolant mixing with oil (milky dipstick)
Fix: Valley pan gasket sits under intake manifold and fails, dumping coolant internally. Timing chain guides become brittle and crack. Both require upper engine teardown (18-24 hours). Always do both together plus water pump and thermostat while you're in there.
Estimated cost: $3,500-5,500
Transmission Cooling System Failure
Common · high severityTypical onset: 70,000-110,000 mi
Symptoms: Transmission slipping or harsh shifts, Pink milkshake in coolant reservoir or transmission pan, Transmission overheating, Sudden transmission failure after coolant/ATF mixing
Fix: The transmission oil cooler integrated into the radiator fails internally, allowing coolant and ATF to mix. Destroys transmission seals and clutches within days if not caught. Requires radiator replacement (3-4 hours), full transmission fluid flush, often transmission rebuild (12-18 hours) if contamination progressed.
Estimated cost: $800-1,200 (caught early) or $3,500-6,000 (transmission damaged)
Self-Leveling Suspension (EHC) Failures
Common · medium severityTypical onset: 60,000-100,000 mi
Symptoms: Rear end sagging overnight or when parked, Compressor runs constantly, Warning light on dash, Uneven ride height side-to-side
Fix: Electronic hydraulic control (EHC) rear shocks leak internally, accumulator spheres lose pressure, and lines crack. Pump runs continuously trying to compensate. Full rear conversion to standard shocks with delete kit (4-6 hours) is cheaper long-term than OE replacement. OE repair involves shocks, accumulator, and often pump.
Estimated cost: $600-1,200 (conversion kit) or $2,500-4,000 (OE parts)
Crankshaft Position Sensor Failure
Occasional · high severitySymptoms: No-start condition with cranking but no fire, Intermittent stalling while driving, Rough running and misfires, Check engine light
Fix: Sensor mounted at bell housing fails from heat cycles, leaving you stranded. Requires transmission removal or lowering for access on V8 (8-10 hours). Keep a spare in the trunk—$80 part requires $800+ labor due to location. Some techs can fish it out with trans partially dropped (6 hours).
Estimated cost: $700-1,200
Thrust Arm Bushings and Front Suspension
Common · medium severityTypical onset: 70,000-120,000 mi
Symptoms: Wandering on highway, requires constant steering correction, Clunking over bumps, Uneven tire wear on inside edges, Steering wheel off-center after hitting bumps
Fix: Front thrust arms (lower control arms) use rubber bushings that tear and allow excessive movement. BMW multi-link front end has 8+ bushings per side. Replace thrust arms, control arms, tie rods, and sway bar links as a package (6-8 hours) plus alignment. Piecemeal replacement wastes money.
Estimated cost: $1,800-2,800
Electrical Gremlins (Window Regulators, Door Locks, Instrument Cluster)
Common · low severitySymptoms: Power windows drop into doors or fail to close, Central locking works intermittently or not at all, Instrument cluster pixels fade or gauges go dead, Check Control warnings for bulbs that actually work
Fix: Window regulator clips break (2 hours per door), door lock actuators fail from worn gears (1.5 hours per door), instrument clusters need pixel repair or replacement. Age-related failures—not if, but when. Cluster rebuild services exist ($300-500 plus shipping) or used replacements need coding.
Estimated cost: $400-800 per window, $200-400 per lock, $500-900 for cluster
Only for BMW die-hards with deep pockets and a trusted independent mechanic—plan on $3k-5k per year in repairs, plus potential $8k-10k engine replacement if Nikasil hasn't been addressed.
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.