BMW/S62B50

BMW · Naturally aspirated

S62B50

M5·E39·1998–2003

"The S62 and M62 are related but not the same — parts are priced way differently, and the S62 is in another league of expensive."

RISKY

62/ 100

"Legend engine, brutal maintenance costs ahead"

—

Max HP

—

Torque Nm

8,000

Oil interval km

Recalls

Known issues

Known Issues

Valve Stem Seal Failure€2,000-4,000 · 100,000-200,000 kmHIGH

The S62 is known for valve stem seal degradation over time, leading to oil being drawn past the seals into the combustion chamber. Forum data specifically references E39 M5 and closely related BMW V8 engines suffering this fault. Labour is extreme due to disassembly required.

Blue smoke from exhaust at idle or after coasting

Excessive oil consumption

Smoking worse after sitting in traffic

DIY: Expert

Water Pump Failure€400-1,200 · 80,000-150,000 kmHIGH

BMW V8 engines of this era including the S62 are known for water pump failure. The plastic impeller design is a known weak point. Failure can lead to rapid overheating and serious engine damage if not addressed promptly.

Rising coolant temperature

Coolant loss

Overheating warning

Weak heater output

DIY: Intermediate

Rod Bearing Wear€1,500-5,000 · 150,000-250,000 kmHIGH

Forum data references spun bearings on high-performance BMW engines with documented oil maintenance. The S62 is a high-revving performance unit sensitive to oil quality and change intervals. Neglected oil changes significantly increase bearing wear risk.

Deep knocking noise from engine

Low oil pressure warning

Rattling at startup

DIY: Expert

Coolant System Hose and Reservoir Degradation€200-600 · 100,000-180,000 kmMODERATE

Forum data highlights coolant reservoir cracking and small coolant recovery hose failures as common on BMW V8 engines of this era. Given the S62's age (1998–2003), all rubber coolant hoses and the plastic reservoir should be considered consumable items.

Coolant puddles under car

Low coolant warning

Visible cracks in reservoir

Sweet smell from engine bay

DIY: Beginner

Oil Leaks from Various Gaskets and Seals€300-1,500 · 80,000-200,000 kmMODERATE

Honest John data and forum references note BMW V8 engines of this family are known to leak oil from valve cover gaskets and other seals. On a 20+ year old performance engine, oil seepage is extremely common and should be expected.

Oil smell from engine bay

Visible oil residue on engine

Oil drips on driveway

Blue smoke under hard acceleration

DIY: Intermediate

Buying Checklist

Verify full documented service history with oil changes no longer than 8,000 km intervals — reject any car with gaps

Start cold and watch exhaust for blue smoke at idle and after coasting — indicates valve stem seal failure

Listen at idle and through full RPM range for knocking or rattling that could indicate rod bearing wear

Pressure test the entire cooling system and inspect water pump weep hole for seepage or residue

Inspect valve covers, cam covers, and underside for fresh oil leaks — budget accordingly if present

Confirm the S62 engine code specifically — do not confuse with related M62 which has different parts pricing and specifications

Service Reality

Community oil interval8,000 km

Oil specificationBMW Longlife-01 5W-40 fully synthetic

Est. ownership cost (2yr)€1,500–4,000 per year depending on mileage and deferred maintenance inherited at purchase

Real mix fuel consumptionNo data

Also Found In

BMW M5 E39 (sole application of S62B50)

Buying Advice

The S62B50 is a genuinely special naturally aspirated V8 but it belongs in the hands of someone prepared for high maintenance costs and complexity. Any example must come with a full, verifiable service history — an S62 without proper oil change records is a serious financial risk due to rod bearing sensitivity. Budget a minimum of €2,000-3,000 immediately after purchase for preventive cooling system and seal work on any high-mileage example. This is a rewarding engine to own but it will not forgive neglect, and labour costs on this platform are among the highest of any E39 variant.