2015 Audi S4 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

10 Alternator / Generator parts for the 2015 Audi S4 come from 6 brands — PURE ENERGY, WAI GLOBAL, FVP and 3 other brands. The "Popular" part is WAI GLOBAL 11717N.

The New section lists 3 options from WAI GLOBAL and VALEO — brand-new units rather than rebuilt ones. WAI GLOBAL 11717N is listed in this group.

The Remanufactured section lists 7 options from PURE ENERGY, FVP, REMY and 1 other brand — factory-rebuilt units with new wear components. FVP 11717 is listed in this group.

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

One part is listed for the 2015 Audi S4 — INA EA02071.

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

39 Battery parts are listed for the 2015 Audi S4, from ACDELCO, DEKA, LUCAS and 6 other brands. DEKA 9A48 carries the "Popular" badge. AGM (Extended Life) and Performance AGM (Extended Life + Increased Power) are all represented, and AGM (Extended Life) alone accounts for 35 parts.

This table covers the positive and ground cables that run from the battery. Typical signs include a stretched or frayed cable, or a control that no longer reaches the end of its travel. Route the new cable through the same clips. A kinked cable binds and fails early. Read more

This group shows a single part: VNE 700039.

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

4 Battery Current Sensor parts for the 2015 Audi S4 come from 3 brands — WELLS, DORMAN and HELLA.

Listed part numbers: DORMAN 601702, HELLA 010942901 and WELLS 5S16152, plus the other parts above.

This table covers the Blind Spot Detection 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

2 Blind Spot Detection Sensor parts for the 2015 Audi S4 come from HELLA.

This group includes HELLA 010905451 and HELLA 010905361.

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

10 Fuse parts are listed for the 2015 Audi S4, from LITTELFUSE and BUSSMANN. LITTELFUSE ATO15 carries the "Popular" badge.

The 10 Amp section lists 2 options from LITTELFUSE — grouped under the catalog's "10 Amp" designation — the notes column spells out what sets them apart. LITTELFUSE LMIN10 is listed in this group.

In the 15 Amp grade, LITTELFUSE supplies 2 parts: grouped under the catalog's "15 Amp" designation — the notes column spells out what sets them apart. A representative part number is LITTELFUSE ATO15.

In the 20 Amp grade, LITTELFUSE supplies 1 part: grouped under the catalog's "20 Amp" designation — the notes column spells out what sets them apart. A representative part number is LITTELFUSE ATO20.

The 25 Amp section lists 1 option from LITTELFUSE — grouped under the catalog's "25 Amp" designation — the notes column spells out what sets them apart. LITTELFUSE ATO25 is listed in this group.

The 30 Amp section lists 1 option from LITTELFUSE — grouped under the catalog's "30 Amp" designation — the notes column spells out what sets them apart. LITTELFUSE ATO30 is listed in this group.

In the 35 Amp grade, BUSSMANN supplies 1 part: grouped under the catalog's "35 Amp" designation — the notes column spells out what sets them apart. A representative part number is BUSSMANN ATC35.

The 5 Amp section lists 2 options from LITTELFUSE — grouped under the catalog's "5 Amp" designation — the notes column spells out what sets them apart. LITTELFUSE ATO5 is listed in this group.

This table covers the HID Headlamp igniters. Read more

One part is listed for the 2015 Audi S4 — ÜRO PARTS 8K0941597E.

This table covers the HID Lighting ballasts. Read more

5 HID Lighting Ballast parts for the 2015 Audi S4 come from 3 brands — VEMO, HELLA and MARELLI. The "Popular" part is VEMO V10730387.

Listed part numbers: VEMO V10730387, HELLA 009935031 and MARELLI LRB290, plus the other parts above.

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

One part is listed for the 2015 Audi S4 — HELLA 011225841.

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

5 Lighting Control Module (LCM) parts for the 2015 Audi S4 come from 2 brands — VEMO and MARELLI. The "Popular" part is VEMO V10730387KIT1.

Listed part numbers: VEMO V10730387KIT1, MARELLI LRB340 and MARELLI LRB400, 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

10 Parking Aid Sensor parts for the 2015 Audi S4 come from 7 brands — VEMO, HELLA, DORMAN and 4 other brands. The "Popular" part is DORMAN 684014.

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 2015 Audi S4 come from 2 brands — VEMO and VNE.

This group includes VEMO V10721602, VEMO V10721604 and VNE 700035.

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

7 Starter Motor parts for the 2015 Audi S4 come from 7 brands — TYC, ULTRA-POWER, WAI GLOBAL and 4 other brands. The "Popular" part is TYC 119113.

The New section: 3 options from TYC, ULTRA-POWER and WAI GLOBAL. TYC 119113 is listed in this group.

The Remanufactured section: 4 options from BOSCH, PURE ENERGY, REMY and 1 other brand. BOSCH SR0850X is listed in this group.

Listed part numbers: TYC 119113 and WAI GLOBAL 17692N, plus the other parts above.

This table covers the regulators that control alternator output voltage. Read more

2 Voltage Regulator parts are listed for the 2015 Audi S4, from ASTEMO / HITACHI and BOSCH.

This group includes ASTEMO / HITACHI ALR0413HUS and BOSCH 1986AE0016.