2021 Audi A4 Allroad Electrical Parts: OEM & Replacement (51 Parts)

This page lists 51 electrical parts for the 2021 Audi A4 Allroad, across 6 part types, covering the 2.0L L4 Turbocharged engine. Every part shows its brand, manufacturer part number and fitment notes.

On the 2021 Audi A4 Allroad, the electrical system covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors. 48 parts of the 51 listed are Battery (38 parts), Parking Aid Sensor (5 parts) and Starter Motor (5 parts). The other 3 part types cover the remaining 3 parts.

Alternator / Generator

Brand	Part Number	Markets	Notes	Buy
WAI GLOBAL	39015N	🇺🇸 US 🇨🇦 CA		View on Amazon

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.

Battery

AGM (Extended Life)

Brand	Part Number	Markets	Notes	Buy
ACDELCO Popular	47AGM	🇺🇸 US 🇨🇦 CA	AGMBCI Group: 47 Fitment notes — ACDELCO 47AGM AGMBCI Group: 47CCA: 680 ARC: 105 MJLength x Width x Height: 9.6 In x 6.8 In x 7.4 In PR-J0H	View on Amazon
DEKA Popular	9A48	🇺🇸 US 🇨🇦 CA	IntimidatorAGM Fitment notes — DEKA 9A48 IntimidatorAGMBCI Group 48760 CCALength X Width X Height: 11 In x 6.875 In x 7.5 In PR-J2D,0K0,0K2,0K4 codeE G	View on Amazon
DEKA Popular	9A94R	🇺🇸 US 🇨🇦 CA	IntimidatorAGM Fitment notes — DEKA 9A94R IntimidatorAGMBCI Group 94R800 CCALength X Width X Height: 12.4375 In x 6.875 In x 7.5 In Fits: PR-J1N Cod or: PR-J4E code	View on Amazon
FVP Popular	P94RAGM	🇺🇸 US 🇨🇦 CA	Platinum AGMBCI Group: 94R Fitment notes — FVP P94RAGM Platinum AGMBCI Group: 94RCCA: 800140 Minute Reserve Capacity(LxWxH) 12.4" x 6.9" x 7.5" Fits: PR-J1N or: PR-J4E	View on Amazon
LUCAS Popular	LBAGM004A	🇺🇸 US 🇨🇦 CA	BCI Group: 48AGM Fitment notes — LUCAS LBAGM004A BCI Group: 48AGMLucas MaxCCA 760RC 120(LxWxH) 10.9" x 6.9" x 7.5" PR-J2D,0K0,0K2,0K4Battery is vented To outside of vehicle	View on Amazon
LUCAS Popular	LBAGM001A	🇺🇸 US 🇨🇦 CA	BCI Group: 47AGM Fitment notes — LUCAS LBAGM001A BCI Group: 47AGMLucas MaxCCA 680RC 105(LxWxH) 9.5" x 6.9" x 7.5" PR-J0HBattery is vented to outside of vehicle	View on Amazon
ACDELCO	48AGM	🇺🇸 US 🇨🇦 CA	AGMBCI Group: 48 Fitment notes — ACDELCO 48AGM AGMBCI Group: 48CCA: 760 ARC: 120 MJLength x Width x Height: 10.9 In x 6.9 In x 7.5 InReserve Capacity Minutes at 25 Amp Load: 120 MJ PR-J2D,0K0,0K2,0K4	View on Amazon
ACDELCO	47SAGM	🇺🇸 US 🇨🇦 CA	AGMBCI Group: 47 Fitment notes — ACDELCO 47SAGM AGMBCI Group: 47CCA: 680 ARC: 110 MJLength x Width x Height: 9.5 In x 6.8 In x 7.4 In PR-J0H	View on Amazon
ACDELCO	94RAGMHR	🇺🇸 US 🇨🇦 CA	High ReserveAGM Fitment notes — ACDELCO 94RAGMHR High ReserveAGMBCI Group: 94RCCA: 850 ARC: 150 MJLength x Width x Height: 12.4 In x 6.9 In x 7.5 In Fits: PR-J1N or: PR-J4E	View on Amazon
ACDELCO	48AGMHR	🇺🇸 US 🇨🇦 CA	High ReserveAGM Fitment notes — ACDELCO 48AGMHR High ReserveAGMBCI Group: 48CCA: 760 ARC: 130 MJLength x Width x Height: 11 In x 6.9 In x 7.5 InHigh Reserve AGMBCI Group 48CCA 760RC 130(LxWxH) 10.91" x 6.85" x 7.48" PR-J2D,0K0,0K2,0K4	View on Amazon
ACDELCO	94RAGM	🇺🇸 US 🇨🇦 CA	AGMBCI Group: 94R Fitment notes — ACDELCO 94RAGM AGMBCI Group: 94RCCA: 850 ARC: 140 MJLength x Width x Height: 12.4 In x 6.9 In x 7.5 In Fits: PR-J1N or: PR-J4E	View on Amazon
ACDELCO	49AGM	🇺🇸 US 🇨🇦 CA	AGMBCI Group: 49 Fitment notes — ACDELCO 49AGM AGMBCI Group: 49CCA: 900 ARC: 160 MJLength x Width x Height: 13.9 In x 6.9 In x 7.5 In Fits: PR-J0B or: PR-J0K	View on Amazon
ACDELCO	49AGMHR	🇺🇸 US 🇨🇦 CA	High ReserveAGM Fitment notes — ACDELCO 49AGMHR High ReserveAGMBCI Group: 49CCA: 900 ARC: 170 MJLength x Width x Height: 13.9 In x 6.9 In x 7.5 In Fits: PR-J0B or: PR-J0K	View on Amazon
ACDELCO	95RAGM	🇺🇸 US 🇨🇦 CA	AGMBCI Group: 95R Fitment notes — ACDELCO 95RAGM AGMBCI Group: 95RCCA: 950 ARC: 190 MJLength x Width x Height: 15.6 In x 6.9 In x 7.5 In PR-J0P	View on Amazon
BOSCH	S6587B	🇺🇸 US 🇨🇦 CA	AGMAGM Fitment notes — BOSCH S6587B AGMAGMBCI Group 94RCCA 800RC 140(LxWxH) 12.44" x 6.88" x 7.5" Fits: PR-J1N codeVehicle computer system May need To be reset and/or battery registered using scan tool.or PR-J4E codeVehicle computer system May need To be reset and/or battery registered using scan tool.	View on Amazon
BOSCH	S6588B	🇺🇸 US 🇨🇦 CA	AGMAGM Fitment notes — BOSCH S6588B AGMAGMBCI Group 49CCA 850RC 170(LxWxH) 13.94" x 6.88" x 7.5" Fits: PR-J1U codeVehicle computer system May need To be reset and/or battery registered using scan tool.or PR-J0B codeVehicle computer system May need To be reset and/or battery registered using scan tool.or PR-J0K codeVehicle computer system May need To be reset and/or battery registered using scan tool.	View on Amazon
DEKA	9A47	🇺🇸 US 🇨🇦 CA	IntimidatorAGM Fitment notes — DEKA 9A47 IntimidatorAGMBCI Group 47660 CCALength X Width X Height: 9.75 In x 6.875 In x 7.5 In Fits: PR-J2D,0K0,0K2,0K4 cod or: PR-J0H codeE	View on Amazon
DEKA	9A49	🇺🇸 US 🇨🇦 CA	IntimidatorAGM Fitment notes — DEKA 9A49 IntimidatorAGMBCI Group 49850 CCALength X Width X Height: 13.9375 In x 6.875 In x 7.5 In Fits: PR-J1U Cod or: PR-J0K cod or: PR-J0B codeE	View on Amazon
DEKA	9A95R	🇺🇸 US 🇨🇦 CA	IntimidatorAGM Fitment notes — DEKA 9A95R IntimidatorAGMBCI Group 95R950 CCALength X Width X Height: 15.5 In x 6.875 In x 7.5 In Fits: PR-J0Z Cod or: PR-J0P Code	View on Amazon
EXIDE	MXH5L247	🇺🇸 US 🇨🇦 CA	Marathon MaxBCI Group 47 (H5) Fitment notes — EXIDE MXH5L247 Marathon MaxBCI Group 47 (H5)CCA: 680100 Minute Reserve Capacity(LxWxH) 9.63" x 6.75" x 7.44" Battery is vented To outside of vehiclePR Codes denote factory installed options For The vehiclePR-J0H	View on Amazon
EXIDE	MXH6L348	🇺🇸 US 🇨🇦 CA	Marathon MaxBCI Group 48 (H6) Fitment notes — EXIDE MXH6L348 Marathon MaxBCI Group 48 (H6)CCA: 760120 Minute Reserve Capacity(LxWxH) 10.88" x 6.88" x 7.5" Battery is vented To outside of vehiclePR Codes denote factory installed options For The vehiclePR-J2D,0K0,0K2,0K4	View on Amazon
EXIDE	MXH7L494R	🇺🇸 US 🇨🇦 CA	Marathon MaxBCI Group 94R (H7) Fitment notes — EXIDE MXH7L494R Marathon MaxBCI Group 94R (H7)CCA: 800140 Minute Reserve Capacity(LxWxH) 12.38" x 6.88" x 7.5" Fits: Battery is vented To outside of vehiclePR Codes denote factory installed options For The vehiclePR-J1N or: Battery is vented To outside of vehiclePR Codes denote factory installed options For The vehiclePR-J4E	View on Amazon
EXIDE	MXH8L549	🇺🇸 US 🇨🇦 CA	Marathon MaxBCI Group 49 (H8) Fitment notes — EXIDE MXH8L549 Marathon MaxBCI Group 49 (H8)CCA: 850160 Minute Reserve Capacity(LxWxH) 13.88" x 6.88" x 7.5" Fits: Battery is vented To outside of vehiclePR Codes denote factory installed options For The vehiclePR-J1U or: Battery is vented To outside of vehiclePR Codes denote factory installed options For The vehiclePR-J0B or: Battery is vented To outside of vehiclePR Codes denote factory installed options For The vehiclePR-J0K	View on Amazon
EXIDE	MXH9L695R	🇺🇸 US 🇨🇦 CA	Marathon MaxBCI Group 95R (H9) Fitment notes — EXIDE MXH9L695R Marathon MaxBCI Group 95R (H9)CCA: 950190 Minute Reserve Capacity(LxWxH) 15.56" x 6.94" x 7.5" Fits: Battery is vented To outside of vehiclePR Codes denote factory installed options For The vehiclePR-J0Z or: Battery is vented To outside of vehiclePR Codes denote factory installed options For The vehiclePR-J0P	View on Amazon
FVP	P47AGM	🇺🇸 US 🇨🇦 CA	Platinum AGMBCI Group: 47 Fitment notes — FVP P47AGM Platinum AGMBCI Group: 47CCA: 680(LxWxH) 9.5" x 6.9" x 7.5" PR-J0H	View on Amazon
FVP	P49AGM	🇺🇸 US 🇨🇦 CA	Platinum AGMBCI Group: 49 Fitment notes — FVP P49AGM Platinum AGMBCI Group: 49CCA: 850180 Minute Reserve Capacity(LxWxH) 13.9" x 6.9" x 7.5" Fits: PR-J0B or: PR-J1U or: PR-J0K	View on Amazon
FVP	P48AGM	🇺🇸 US 🇨🇦 CA	Platinum AGMBCI Group: 48 Fitment notes — FVP P48AGM Platinum AGMBCI Group: 48CCA: 760120 Minute Reserve Capacity (LxWxH) 10.9" x 6.9" x 7.5" PR-J2D,0K0,0K2,0K4O	View on Amazon
LUCAS	LBAGM005A	🇺🇸 US 🇨🇦 CA	BCI Group: 94RAGM Fitment notes — LUCAS LBAGM005A BCI Group: 94RAGMLucas MaxCCA 800RC 140(LxWxH) 12.4" x 6.9" x 7.5" PR-J0B, PR-J0K, PR-J1UBattery is vented To outside of vehicle	View on Amazon
LUCAS	LBAGM006A	🇺🇸 US 🇨🇦 CA	BCI Group: 49AGM Fitment notes — LUCAS LBAGM006A BCI Group: 49AGMLucas MaxCCA 850RC 160(LxWxH) 13.9" x 6.9" x 7.5" PR-J1N, PR-J4EBattery is vented To outside of vehicle	View on Amazon
LUCAS	LBAGM007A	🇺🇸 US 🇨🇦 CA	BCI Group: 95RAGM Fitment notes — LUCAS LBAGM007A BCI Group: 95RAGMLucas MaxCCA 950RC 190(LxWxH) 15.4" x 6.9" x 7.5" PR-J0PBattery is vented To outside of vehicle	View on Amazon
MOTORCRAFT	BAGM49H8	🇺🇸 US 🇨🇦 CA	Tested Tough AGMBCI Group: 49/H8 or BCI Group 49 Fitment notes — MOTORCRAFT BAGM49H8 Tested Tough AGMBCI Group: 49/H8 or BCI Group 49850 CCA160 Minute Reserve CapacityLength X Width X Height: 13-15/16 inch x 6.9375 inch x 7-1/2 inch Fits: with PR Code J0BVehicle computer system must be resetCCor with PR Code J1UVehicle computer system must be reset	View on Amazon
MOTORCRAFT	BAGM95RH9	🇺🇸 US 🇨🇦 CA	Tested Tough AGMBCI Group 95R or BCI Group: 95R/H9 Fitment notes — MOTORCRAFT BAGM95RH9 Tested Tough AGMBCI Group 95R or BCI Group: 95R/H9950 CCA105 Minute Reserve CapacityLength X Width X Height: 15.5625 inch x 6.9375 inch x 7.5 inch Fits: Vehicle computer system must be resetwith PR Code J0Z or: Vehicle computer system must be resetwith PR Code J0PCC	View on Amazon
P1MAX	PMAGMH648	🇺🇸 US 🇨🇦 CA	BCI Group 48 AGM760 CCA Fitment notes — P1MAX PMAGMH648 BCI Group 48 AGM760 CCALength x Width x Height: 11 x 6 7/8 x 7 4/7 Kubota 1503, 1703	View on Amazon
P1MAX	PMAGMH794R	🇺🇸 US 🇨🇦 CA	BCI Group 94R AGM800 CCA Fitment notes — P1MAX PMAGMH794R BCI Group 94R AGM800 CCALength x Width x Height: 12-3/8 x 6-7/8 x 7-1/2 Late	View on Amazon

Performance AGM (Extended Life + Increased Power)

Brand	Part Number	Markets	Notes	Buy
FULLRIVER	FT61047	🇺🇸 US 🇨🇦 CA	BCI Group 47(Length X Width X Height) 9.49 In x 6.89 In x 7.48 In Fitment notes — FULLRIVER FT61047 BCI Group 47(Length X Width X Height) 9.49 In x 6.89 In x 7.48 InAGMCCA: 610 PR-J0H	View on Amazon
FULLRIVER	FT68048	🇺🇸 US 🇨🇦 CA	BCI Group 48(Length X Width X Height) 10.94 In x 6.89 In x 7.48 In Fitment notes — FULLRIVER FT68048 BCI Group 48(Length X Width X Height) 10.94 In x 6.89 In x 7.48 InAGMCCA: 680 PR-J2D,0K0,0K2,0K4	View on Amazon
FULLRIVER	FT85094R	🇺🇸 US 🇨🇦 CA	BCI Group 94R(Length X Width X Height) 12.36 In x 6.85 In x 7.48 In Fitment notes — FULLRIVER FT85094R BCI Group 94R(Length X Width X Height) 12.36 In x 6.85 In x 7.48 InAGMCCA: 850 Fits: PR-J1N or: PR-J4EOriginal Equipment battery is EFB (Enhanced Flooded Battery)	View on Amazon
FULLRIVER	FT89049	🇺🇸 US 🇨🇦 CA	BCI Group 49(Length X Width X Height) 13.9 In x 6.89 In x 7.48 In Fitment notes — FULLRIVER FT89049 BCI Group 49(Length X Width X Height) 13.9 In x 6.89 In x 7.48 InAGMCCA: 850 Fits: PR-J0B or: PR-J0P or: PR-J0Z or: PR-J1U or: PR-J0KOriginal Equipment battery is EFB (Enhanced Flooded Battery)	View on Amazon

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.

Battery Current Sensor

Brand	Part Number	Markets	Notes	Buy
WELLS	5S16132	🇺🇸 US 🇨🇦 CA		View on Amazon

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.

Lighting Control Module (LCM)

Brand	Part Number	Markets	Notes	Buy
VEMO	V10730668	🇺🇸 US 🇨🇦 CA	To 03/10/2022	View on Amazon

This table covers the modules that control the exterior lighting.

Parking Aid Sensor

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Popular	PPS120	🇺🇸 US 🇨🇦 CA	Black Fitment notes — STANDARD MOTOR PRODUCTS PPS120 Black Fits: Rearwith Paint to Match Spoiler or: Front Innerwith Paint to Match Spoiler or: Front Outerwith Paint to Match Spoiler	View on Amazon
HELLA	358141711	🇺🇸 US	3-Pin ConnectorPlugged Fitment notes — HELLA 358141711 3-Pin ConnectorPlugged RearPaint as required	View on Amazon
STANDARD MOTOR PRODUCTS	PPS112	🇺🇸 US 🇨🇦 CA	Black Fitment notes — STANDARD MOTOR PRODUCTS PPS112 Black Front	View on Amazon
VARIOUS MFR	AU1075104	🇺🇸 US 🇨🇦 CA	Customer Paints to Match Fitment notes — VARIOUS MFR AU1075104 Customer Paints to Match Fits: FrontInner/Outer or: RearInner/OuterProximity	View on Amazon
VARIOUS MFR	AU1075102	🇺🇸 US 🇨🇦 CA	Customer Paints to Match Fitment notes — VARIOUS MFR AU1075102 Customer Paints to Match FrontParallel Park Sensor	View on Amazon

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.

Starter Motor

New

Brand	Part Number	Markets	Notes	Buy
WAI GLOBAL	31089N	🇺🇸 US 🇨🇦 CA		View on Amazon

Remanufactured

Brand	Part Number	Markets	Notes	Buy
PURE ENERGY Popular	18256	🇺🇸 US 🇨🇦 CA	Remanufactured Fitment notes — PURE ENERGY 18256 Remanufactured with Denso Starter	View on Amazon
FVP	18256	🇺🇸 US 🇨🇦 CA	Remanufactured Fitment notes — FVP 18256 Remanufactured with Denso Starter	View on Amazon
REMY	16409	🇺🇸 US 🇨🇦 CA	Remanufactured	View on Amazon
TERREPOWER	52184	🇺🇸 US 🇨🇦 CA	Remanufactured	View on Amazon

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.

Buying Electrical Parts for a 2021 Audi A4 Allroad

On this vehicle, the electrical system covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors.

Confirm you have the 2.0L L4 Turbocharged engine — every part on this page is matched to it.
Read the notes on each row for position, trim and spec qualifiers before you order.
Where labor overlaps, clean or renew the battery terminals and grounds with any charging-system repair.
Cross-reference the manufacturer part number against your old part or a service-manual listing.

Start with the largest groups on this page: Battery and Parking Aid Sensor .

Frequently Asked Questions

How many electrical parts fit the 2021 Audi A4 Allroad?

Our catalog currently lists 51 electrical parts for the 2021 Audi A4 Allroad across 6 subcategories and 18 brands, covering the 2.0L L4 Turbocharged engine. Each part is matched to the engine(s) it fits.

What are the signs of electrical problems on a 2021 Audi A4 Allroad?

Common symptoms include slow cranking on cold mornings, a battery light that flickers, dim lights at idle, or a check-engine code pointing at a sensor circuit. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.

What should I replace at the same time?

Where labor overlaps, clean or renew the battery terminals and grounds with any charging-system repair.

What do the market flags (US, CA, MX) on each part mean?

They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2021 Audi A4 Allroad was originally sold in the US, the safest choice is a part marked for the US market.

How do I make sure a part fits my 2021 Audi A4 Allroad?

Every part on this page is matched to the 2.0L L4 Turbocharged engine. Then test before replacing — a failed alternator and a bad ground can look identical, and sensors are frequently condemned for wiring faults. The notes column carries position and trim qualifiers where they apply.

Other Parts for the 2021 Audi A4 Allroad

Belt Drive Body & Lamp Assembly Brake & Wheel Hub Cooling System Drivetrain Electrical Bulb & Socket Electrical Connector Electrical Switch & Relay Engine Exhaust & Emission Fuel & Air Heat & Air Conditioning Ignition Interior Steering Suspension Automatic Transmission Wheel

Electrical Parts for Other Audi A4 Allroad Years

2025 Audi A4 Allroad 2024 Audi A4 Allroad 2023 Audi A4 Allroad 2022 Audi A4 Allroad 2020 Audi A4 Allroad 2019 Audi A4 Allroad 2018 Audi A4 Allroad 2017 Audi A4 Allroad 2016 Audi A4 Allroad 2015 Audi A4 Allroad

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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.

Published by AutoFactsDB from manufacturer application data. How fitment is matched Report a fitment error