2017 Audi A3 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

27 Alternator / Generator parts are listed for the 2017 Audi A3, from PURE ENERGY, WAI GLOBAL, TERREPOWER and 5 other brands. TYC 221073 carries the "Popular" badge. New and Remanufactured are all represented, and Remanufactured alone accounts for 16 parts.

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 for the 2017 Audi A3 come from 2 brands — CONTINENTAL and LITENS.

Listed part numbers: CONTINENTAL 49934 and LITENS 920851A.

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

20 Battery parts for the 2017 Audi A3 come from 8 brands — ACDELCO, DEKA, FVP and 5 other brands. The "Popular" part is ACDELCO 47AGM.

In the AGM (Extended Life) grade, ACDELCO, DEKA, FVP and 4 other brands supply 18 parts: grouped under the catalog's "AGM (Extended Life)" designation — the notes column spells out what sets them apart. A representative part number is ACDELCO 47AGM.

In the Performance AGM (Extended Life + Increased Power) grade, FULLRIVER supplies 2 parts: grouped under the catalog's "Performance AGM (Extended Life + Increased Power)" designation — the notes column spells out what sets them apart. A representative part number is FULLRIVER FT61047.

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 are listed for the 2017 Audi A3, from STANDARD MOTOR PRODUCTS, VEMO and WELLS.

Listed part numbers: STANDARD MOTOR PRODUCTS BSC101, VEMO V10170002 and WELLS 5S16136.

This table covers the Cruise Control Distance 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

This group shows a single part: VEMO V10720539.

This table covers the replacement fuses for this vehicle's fuse boxes. Typical signs include one circuit dead while its neighbor still works, or a fuse that blows again as soon as you replace it. Match amperage and fuse type. A repeat blow means a short — find it before the next fuse. Read more

12 Fuse parts for the 2017 Audi A3 come from LITTELFUSE. The "Popular" part is LITTELFUSE ATO10.

In the 10 Amp grade, LITTELFUSE supplies 2 parts: grouped under the catalog's "10 Amp" designation — the notes column spells out what sets them apart. A representative part number is LITTELFUSE ATO10.

The 15 Amp section lists 1 option from LITTELFUSE — grouped under the catalog's "15 Amp" designation — the notes column spells out what sets them apart. LITTELFUSE ATO15 is listed in this group.

The 20 Amp section lists 1 option from LITTELFUSE — grouped under the catalog's "20 Amp" designation — the notes column spells out what sets them apart. LITTELFUSE ATO20 is listed in this group.

In the 25 Amp grade, LITTELFUSE supplies 1 part: grouped under the catalog's "25 Amp" designation — the notes column spells out what sets them apart. A representative part number is LITTELFUSE ATO25.

In the 30 Amp grade, LITTELFUSE supplies 2 parts: grouped under the catalog's "30 Amp" designation — the notes column spells out what sets them apart. A representative part number is LITTELFUSE ATO30.

The 40 Amp section lists 2 options from LITTELFUSE — grouped under the catalog's "40 Amp" designation — the notes column spells out what sets them apart. LITTELFUSE ATO40 is listed in this group.

In the 5 Amp grade, LITTELFUSE supplies 2 parts: grouped under the catalog's "5 Amp" designation — the notes column spells out what sets them apart. A representative part number is LITTELFUSE ATO5.

In the 50 Amp grade, LITTELFUSE supplies 1 part: grouped under the catalog's "50 Amp" designation — the notes column spells out what sets them apart. A representative part number is LITTELFUSE MAX50.

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

6 Lighting Control Module (LCM) parts are listed for the 2017 Audi A3, from ÜRO PARTS and VEMO. ÜRO PARTS 8V0998473A carries the "Popular" badge.

Listed part numbers: ÜRO PARTS 8V0998473A, ÜRO PARTS 8V0998473 and ÜRO PARTS 8V0998474, 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

8 Parking Aid Sensor parts are listed for the 2017 Audi A3, from STANDARD MOTOR PRODUCTS, VARIOUS MFR and HELLA. STANDARD MOTOR PRODUCTS PPS120 carries the "Popular" badge.

This group includes STANDARD MOTOR PRODUCTS PPS120, STANDARD MOTOR PRODUCTS PPS112 and HELLA 358141711 and the remaining parts above.

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

4 Rain Sensor parts are listed for the 2017 Audi A3, from VEMO and VNE.

This group includes VEMO V10721603, VEMO V10721602 and VEMO V10721604 and the remaining parts above.