2019 Audi A4 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 2019 Audi A4 come from 4 brands — PURE ENERGY, TYC, REMY and 1 other brand. The "Popular" part is TYC 221083.

The New section lists 1 option from TYC — brand-new units rather than rebuilt ones. TYC 221083 is listed in this group.

The Remanufactured section lists 4 options from PURE ENERGY, REMY and TERREPOWER — factory-rebuilt units with new wear components. PURE ENERGY 14074 is listed in this group.

Part numbers include TYC 221083, PURE ENERGY 14074 and PURE ENERGY 14061, among others listed above.

This table covers the pulleys on the alternator shaft. Typical signs include a growl or chirp that follows engine speed, or a pulley that will not spin freely by hand. Spin each pulley with the belt off. Roughness or play means replace it with the belt. Read more

2 Alternator / Generator Pulley parts are listed for the 2019 Audi A4, from CONTINENTAL and LITENS.

This group includes CONTINENTAL 49909 and LITENS 920090A.

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

41 Battery parts are listed for the 2019 Audi A4, from ACDELCO, DEKA, LUCAS and 6 other brands. ACDELCO 47AGM carries the "Popular" badge. AGM (Extended Life) and Performance AGM (Extended Life + Increased Power) are all represented, and AGM (Extended Life) alone accounts for 37 parts.

This table covers the Battery Current 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 Battery Current Sensor parts for the 2019 Audi A4 come from 3 brands — DORMAN, HELLA and WELLS.

Part numbers include DORMAN 601702, HELLA 358158001 and WELLS 5S16132.

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

5 Lighting Control Module (LCM) parts for the 2019 Audi A4 come from 2 brands — MARELLI and VEMO. The "Popular" part is VEMO V10730668.

Listed part numbers: VEMO V10730668, MARELLI LRE539 and MARELLI LRE309, plus the other 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

7 Parking Aid Sensor parts for the 2019 Audi A4 come from 3 brands — STANDARD MOTOR PRODUCTS, HELLA and VARIOUS MFR. The "Popular" part is STANDARD MOTOR PRODUCTS PPS120.

Listed part numbers: STANDARD MOTOR PRODUCTS PPS120, STANDARD MOTOR PRODUCTS PPS112 and HELLA 358141711, plus the other parts above.

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

8 Starter Motor parts for the 2019 Audi A4 come from 6 brands — BOSCH, PURE ENERGY, TYC and 3 other brands. The "Popular" part is TYC 116428.

The New section: 3 options from TYC, BOSCH and WAI GLOBAL. TYC 116428 is listed in this group.

The Remanufactured section: 5 options from PURE ENERGY, BOSCH, REMY and 1 other brand. PURE ENERGY 12784 is listed in this group.

This group includes TYC 116428, BOSCH SR0797N and WAI GLOBAL 16428N and the remaining parts above.