2020 BMW 540I Electrical Parts

This table covers the alternators that charge the battery and run the electrical load. Typical signs include dim lights at idle, a battery lamp, or a growl from the charging pulley. Load-test the battery and inspect the belt and grounds — a bad ground mimics a failed alternator. Read more

5 Alternator / Generator parts for the 2020 BMW 540I come from 4 brands — PURE ENERGY, BOSCH, REMY and 1 other brand. The "Popular" part is PURE ENERGY 14012.

This group includes PURE ENERGY 14012, BOSCH AL0759X and PURE ENERGY 14060 and the remaining parts above.

This table covers the batteries listed by group size and specification. Typical signs include slow cranking, a battery lamp, or a no-start after the vehicle sat overnight. Confirm group size and terminal layout in the notes. Clean the posts and the ground before condemning the battery. Read more

28 Battery parts are listed for the 2020 BMW 540I, from ACDELCO, DEKA, EXIDE and 6 other brands. ACDELCO 47AGM carries the "Popular" badge. They are grouped as AGM (Extended Life) and Performance AGM (Extended Life + Increased Power), with AGM (Extended Life) the largest group at 26 parts from ACDELCO, DEKA, EXIDE and 5 other brands.

This table covers the Daytime Running Light modules. Typical signs include a cluster of unrelated faults, a no-communication code, or a module that will not sleep. Confirm power, ground and programming compatibility in the notes. Modules are rarely plug-and-play across years. Read more

2 Daytime Running Light Module parts for the 2020 BMW 540I come from ÜRO PARTS.

This group includes ÜRO PARTS 63117214939 and ÜRO PARTS 63117214940.

This table covers the horns mounted in the front of the vehicle. Read more

FIAMM supplies the 7 Horn parts for the 2020 BMW 540I. FIAMM 72112 carries the "Popular" badge.

In the Accessory Replacement grade, FIAMM supplies 5 parts: grouped under the catalog's "Accessory Replacement" designation — the notes column spells out what sets them apart. A representative part number is FIAMM 72112.

The Standard Replacement section lists 2 options from FIAMM — built to original-equipment specification. FIAMM 7421122 is listed in this group.

Part numbers include FIAMM 72112, FIAMM 7410024 and FIAMM 6602023, among others listed above.

This table covers the modules that control the exterior lighting. Read more

5 Lighting Control Module (LCM) parts for the 2020 BMW 540I come from 2 brands — VEMO and MARELLI. The "Popular" part is VEMO V20730210.

This group includes VEMO V20730210, MARELLI LRE568 and MARELLI LRE570 and the remaining parts above.

This table covers the ultrasonic park-aid sensors in the bumper. 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

6 Parking Aid Sensor parts for the 2020 BMW 540I come from 4 brands — STANDARD MOTOR PRODUCTS, MARELLI, DORMAN and 1 other brand. The "Popular" part is STANDARD MOTOR PRODUCTS PPS120.

Part numbers include STANDARD MOTOR PRODUCTS PPS120, STANDARD MOTOR PRODUCTS PPS40 and DORMAN 684134, among others listed above.

This table covers the brackets that mount the Parking Aid Sensor. Typical signs include a cracked mount, a rattle, or a bracket that no longer holds alignment. Confirm position in the notes. Many brackets look alike and bolt to different corners. Read more

This group shows a single part: VARIOUS MFR BM1174111.

This table covers the Rain 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

3 Rain Sensor parts for the 2020 BMW 540I come from 2 brands — HELLA and VEMO.

This group includes HELLA 011808841, HELLA 011807921 and VEMO V20720202.

This table covers the starter motors that crank the engine. Typical signs include no motion, a squeal, or a motor that only runs on one speed. Confirm power, ground and the control module before replacing the motor. Read more

5 Starter Motor parts for the 2020 BMW 540I come from 4 brands — BOSCH, PURE ENERGY, REMY and 1 other brand. The "Popular" part is PURE ENERGY 12452.

The New section lists 1 option from BOSCH — brand-new units rather than rebuilt ones. BOSCH SR0865N is listed in this group.

The Remanufactured section lists 4 options from PURE ENERGY, BOSCH, REMY and 1 other brand — factory-rebuilt units with new wear components. PURE ENERGY 12452 is listed in this group.

Part numbers include PURE ENERGY 12452, BOSCH SR0865N and BOSCH SR0865X, among others listed above.