2021 BMW M340I 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

8 Alternator / Generator parts for the 2021 BMW M340I come from 3 brands — PURE ENERGY, FVP and REMY. The "Popular" part is PURE ENERGY 10396.

Listed part numbers: PURE ENERGY 10396 and PURE ENERGY 10397, plus the other 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

25 Battery parts are listed for the 2021 BMW M340I, from ACDELCO, DEKA, LUCAS and 6 other brands. DEKA 9A94R carries the "Popular" badge.

The AGM (Extended Life) section lists 23 options from ACDELCO, DEKA, LUCAS and 5 other brands — grouped under the catalog's "AGM (Extended Life)" designation — the notes column spells out what sets them apart. DEKA 9A94R is listed in this group.

The Performance AGM (Extended Life + Increased Power) section lists 2 options from FULLRIVER — grouped under the catalog's "Performance AGM (Extended Life + Increased Power)" designation — the notes column spells out what sets them apart. FULLRIVER FT85094R is listed in this group.

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

This group shows a single part: ÜRO PARTS 63118496133.

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

One part is listed for the 2021 BMW M340I — HELLA 007728981.

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

2 Lighting Control Module (LCM) parts for the 2021 BMW M340I come from VEMO.

Part numbers include VEMO V20730305 and VEMO V20730306.

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

3 Parking Aid Sensor parts for the 2021 BMW M340I come from 2 brands — VARIOUS MFR and STANDARD MOTOR PRODUCTS.

Listed part numbers: STANDARD MOTOR PRODUCTS PPS183, VARIOUS MFR BM1075104 and VARIOUS MFR BM1075106.

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

2 Parking Aid Sensor Bracket parts for the 2021 BMW M340I come from 2 brands — TECHPRO and VARIOUS MFR.

Listed part numbers: TECHPRO BM1076103 and VARIOUS MFR BM1074121.

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

4 Starter Motor parts for the 2021 BMW M340I come from 4 brands — WAI GLOBAL, FVP, PURE ENERGY and 1 other brand.

The New section lists 1 option from WAI GLOBAL — brand-new units rather than rebuilt ones. WAI GLOBAL 31413N is listed in this group.

The Remanufactured section lists 3 options from FVP, PURE ENERGY and REMY — factory-rebuilt units with new wear components. FVP 12883 is listed in this group.

Listed part numbers: WAI GLOBAL 31413N and FVP 12883, plus the other parts above.