2021 BMW M4 Engine Parts

This table covers lower / conversion gasket sets for oil-pan and related joints. Typical signs include the leaks that sent the engine or gearbox to the bench. Use every gasket the set is meant for that opening — leftover unused pieces usually belong to another configuration. Read more

One part is listed for the 2021 BMW M4 — AJUSA 54320500.

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

3 Crankshaft Seal parts for the 2021 BMW M4 come from 2 brands — AJUSA and VICTOR REINZ.

Part numbers include AJUSA 15075200, AJUSA 15107900 and VICTOR REINZ 812941200.

This table covers the bolts that clamp the cylinder head to the block. Read more

2 Cylinder Head Bolt parts are listed for the 2021 BMW M4, from AJUSA and MAHLE / CLEVITE.

Listed part numbers: AJUSA 81082000 and MAHLE / CLEVITE GS33999.

This table covers the head gaskets that seal the block to the cylinder head. 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

2 Cylinder Head Gasket parts are listed for the 2021 BMW M4, from AJUSA and ELRING.

This group includes AJUSA 10260600 and ELRING 511091.

This table covers multi-piece gasket sets for a cylinder-head job. Typical signs include the leaks that sent the engine or gearbox to the bench. Use every gasket the set is meant for that opening — leftover unused pieces usually belong to another configuration. Read more

2 Cylinder Head Gasket Set parts are listed for the 2021 BMW M4, from AJUSA and VICTOR REINZ.

Part numbers include AJUSA 52601200 and VICTOR REINZ 021136501.

This table covers full gasket kits covering the joints opened in an engine rebuild. Typical signs include the leaks that sent the engine or gearbox to the bench. Use every gasket the set is meant for that opening — leftover unused pieces usually belong to another configuration. Read more

One part is listed for the 2021 BMW M4 — AJUSA 50546600.

This table covers the Harmonic Balancer bolts. Read more

This group shows a single part: REIN HWB0074.

This table covers the gaskets between the intake manifold and the cylinder head. 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 2021 BMW M4 — MAHLE / CLEVITE MS20465.

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 2021 BMW M4 come from 2 brands — LIQUI MOLY and VALVOLINE. The "Popular" part is VALVOLINE 787301.

Listed part numbers: VALVOLINE 787301, LIQUI MOLY 22260 and LIQUI MOLY 22261, plus the other parts above.

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

2 Oil Drain Plug parts for the 2021 BMW M4 come from 2 brands — DORMAN and REIN.

Listed part numbers: DORMAN 090088 and REIN HWU1041.

This table covers the crush washers and gaskets under the oil drain plug. 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 2021 BMW M4 — AJUSA 21010400.

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

2 Oil Filler Cap parts for the 2021 BMW M4 come from 2 brands — MOTORAD and VAICO.

Listed part numbers: MOTORAD MO214 and VAICO V204688.

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

5 Oil Filter parts for the 2021 BMW M4 come from 5 brands — MAHLE / CLEVITE, HENGST, MANN and 2 other brands. The "Popular" part is MAHLE / CLEVITE OX387D.

This group includes MAHLE / CLEVITE OX387D, HENGST E258HD379 and MANN HU8011Z and the remaining parts above.

This table covers the gaskets between the oil pan and the block. 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

This group shows a single part: VICTOR REINZ 703141410.

This table covers the gaskets that seal the Oil Pump. 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 2021 BMW M4 — AJUSA 01835400.

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

3 Turbocharger Gasket parts are listed for the 2021 BMW M4, from AJUSA and ELRING.

Listed part numbers: AJUSA 01158200, AJUSA JTC12650 and ELRING 087320.

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 2021 BMW M4 come from AJUSA.

Listed part numbers: AJUSA OP11305 and AJUSA OP11315.

This table covers the Turbocharger Oil Line 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 01335200.

This table covers the Valve covers. Read more

One part is listed for the 2021 BMW M4 — SKP SK743462.

This table covers the gaskets that seal the valve cover to the cylinder head. 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

This group shows a single part: AJUSA 11172800.

This table covers the lifters / tappets that transfer cam motion to the valves. Read more

This group shows a single part: AJUSA 85022300.

This table covers the seals on each valve stem that control oil into the guides. 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

4 Valve Stem Seal parts for the 2021 BMW M4 come from 2 brands — AJUSA and MAHLE / CLEVITE.

Listed part numbers: AJUSA 57051500, AJUSA 12027900 and AJUSA 12028200, plus the other parts above.

This table covers the Variable Valve Timing (VVT) Eccentric Shaft actuators. 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

This group shows a single part: ÜRO PARTS 11378652738.

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

7 Variable Valve Timing (VVT) Solenoid / Actuator parts for the 2021 BMW M4 come from 7 brands — GATES, ÜRO PARTS, HOLSTEIN and 4 other brands. The "Popular" part is GATES VVS229.

The Economy section lists 5 options from GATES, ÜRO PARTS, HOLSTEIN and 2 other brands — the catalog's value-priced group. GATES VVS229 is listed in this group.

In the Standard Replacement grade, NTK and STANDARD MOTOR PRODUCTS supply 2 parts: built to original-equipment specification. A representative part number is NTK VV0069.

Listed part numbers: GATES VVS229, ÜRO PARTS 11367614288 and HOLSTEIN 2VTS0370, plus the other parts 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 2021 BMW M4 — AJUSA 01907000.