2025 BMW M850I Engine Parts

This table covers the seals at each camshaft end. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

This group shows a single part: FEL-PRO TCS46149.

This table covers the front and rear seals that keep oil in at the crankshaft. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

2 Crankshaft Seal parts for the 2025 BMW M850I come from 2 brands — FEL-PRO and MAHLE / CLEVITE.

Listed part numbers: FEL-PRO BS40780 and MAHLE / CLEVITE 68040.

This table covers the mounts that hold the engine to the chassis. Typical signs include a clunk on takeoff, a vibration at idle, or a separated rubber insert. Support the powertrain before unbolting a mount, and torque the fasteners in the notes. Read more

3 Motor Mount parts for the 2025 BMW M850I come from 2 brands — DEA / MARMON RIDE CONTROL and ANCHOR.

This group includes ANCHOR 10258, DEA / MARMON RIDE CONTROL A70085 and DEA / MARMON RIDE CONTROL A70086.

This table covers the engine oils listed by grade and specification for this engine. Typical signs include a low-oil lamp, knocking after a long interval, or oil that has gone thin and black well before the next service. Match the viscosity and spec in the notes (and on the filler cap). The tables group grades — they are not interchangeable. Read more

5 Oil parts for the 2025 BMW M850I come from 2 brands — LIQUI MOLY and VALVOLINE. The "Popular" part is VALVOLINE 787301.

Part numbers include VALVOLINE 787301, LIQUI MOLY 22260 and LIQUI MOLY 22261, among others listed above.

This table covers the drain plugs in the oil pan. Read more

This group shows a single part: REIN HWU0115.

This table covers the caps on the oil filler neck. Read more

This group shows a single part: MOTORAD MO214.

This table covers the oil filters that screw onto this engine's filter mount. Typical signs include low oil pressure after a service, or a filter that will not spin off because the old gasket stayed on the block. Lube the new gasket and tighten to the spec on the box; a double-gasket install dumps the sump on the first drive. Read more

11 Oil Filter parts for the 2025 BMW M850I come from 10 brands — VARIOUS MFR, PRO-TEC, CHAMP / LUBER-FINER and 7 other brands. The "Popular" part is PRO-TEC PXL57189.

The Economy section lists 7 options from VARIOUS MFR, PRO-TEC, CHAMP / LUBER-FINER and 3 other brands — the catalog's value-priced group. PRO-TEC PXL57189 is listed in this group.

In the Standard Replacement grade, WIX, FEL-PRO, HASTINGS / BALDWIN and 1 other brand supply 4 parts: built to original-equipment specification. A representative part number is WIX 57189.

This table covers the Oil Level sensors. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors. Read more

2 Oil Level Sensor parts for the 2025 BMW M850I come from 2 brands — STANDARD MOTOR PRODUCTS and ÜRO PARTS.

Part numbers include STANDARD MOTOR PRODUCTS FLS325 and ÜRO PARTS 12618638754.

This table covers the Oil Level Sensor Gasket O-rings. Typical signs include a seep at a fitting or a housing that weeps after a service. Lube the new O-ring with the fluid it will see, and do not roll it into the groove. Read more

This group shows a single part: AJUSA 16078650.

This table covers the seals at the Timing Cover. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

2 Timing Cover Seal parts for the 2025 BMW M850I come from 2 brands — FEL-PRO and MAHLE / CLEVITE.

This group includes FEL-PRO TCS46311 and MAHLE / CLEVITE 67930.

This table covers the Turbocharger Boost sensors. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors. Read more

2 Turbocharger Boost Sensor parts are listed for the 2025 BMW M850I, from WELLS and BECK/ARNLEY.

Economy: 1 part, from WELLS. A representative part number is WELLS 5S13286.

The Standard Replacement section: 1 option from BECK/ARNLEY. BECK/ARNLEY 1581726 is listed in this group.

Listed part numbers: WELLS 5S13286 and BECK/ARNLEY 1581726.

This table covers the Turbocharger Coolant lines. Typical signs include a wet fitting, a rusted pipe, or a pressure loss in this circuit. Flare or thread the new line the way the notes specify; a kinked replacement will fail early. Read more

3 Turbocharger Coolant Line parts for the 2025 BMW M850I come from REIN.

Part numbers include REIN CHT0698, REIN CHT0697 and REIN CHT0695.

This table covers the gaskets that seal the Turbocharger. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

One part is listed for the 2025 BMW M850I — AJUSA 01158200.

This table covers the Turbocharger Oil lines. Typical signs include a wet fitting, a rusted pipe, or a pressure loss in this circuit. Flare or thread the new line the way the notes specify; a kinked replacement will fail early. Read more

2 Turbocharger Oil Line parts for the 2025 BMW M850I come from 2 brands — REIN and VAICO.

This group includes REIN TFP0345 and VAICO V204576.

This table covers the Valve covers. Read more

One part is listed for the 2025 BMW M850I — SKP SK743462.

This table covers the oil-control solenoids that command the cam phasers. Typical signs include a door or range that will not move, or a click with no motion. Confirm the command signal before replacing the actuator — a failed module looks the same. Read more

6 Variable Valve Timing (VVT) Solenoid / Actuator parts for the 2025 BMW M850I come from 3 brands — WELLS, VNE and WALKER PRODUCTS. The "Popular" part is WALKER PRODUCTS 5901282.

Part numbers include WALKER PRODUCTS 5901282, WELLS 2T1247 and VNE 4022002, among others listed above.

This table covers the seals at the Variable Valve Timing (VVT) Solenoid Gasket. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

One part is listed for the 2025 BMW M850I — AJUSA 01907000.