The 2018 Audi A8 has 7 electrical connector parts with verified fitment on this page — 6 part types and 2 brands, covering all 3 engine options (3.0L V6 Supercharged, 4.0L V8 Turbocharged and 6.3L W12). Each part includes a manufacturer part number and application notes.
On the 2018 Audi A8, the connector system supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules. 4 parts of the 7 listed are Repair Harness (2 parts), ABS Wheel Speed Sensor Connector (1 part) and Accelerator Pedal Position Sensor Connector (1 part). The other 3 part types cover the remaining 3 parts.
The 2018 Audi A8 was sold with 3 engines. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2018 Audi A8 electrical connector parts are STANDARD MOTOR PRODUCTS (5 parts) and VEMO (2 parts).
Each part number listed for the 2018 Audi A8 opens a page with every vehicle that part fits.
ABS Wheel Speed Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 6.3L W12 | S3138 | 🇲🇽 MX | Terminal Gender: FemaleTerminal Type: Blade | View on Amazon |
This table covers the harness connectors at each ABS wheel-speed sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
One part is listed for the 2018 Audi A8 — STANDARD MOTOR PRODUCTS S3138.
Accelerator Pedal Position Sensor Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 6.3L W12 | S3259 | 🇲🇽 MX | View on Amazon |
This table covers the harness connectors at the Accelerator Pedal Position Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
One part is listed for the 2018 Audi A8 — STANDARD MOTOR PRODUCTS S3259.
Accessory Power Relay Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 6.3L W12 | S3068 | 🇲🇽 MX | Connector Shape: Rectangular | View on Amazon |
This table covers the harness connectors at the Accessory Power Relay. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
One part is listed for the 2018 Audi A8 — STANDARD MOTOR PRODUCTS S3068.
Horn Relay Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 6.3L W12 | S3068 | 🇲🇽 MX | Connector Shape: Rectangular | View on Amazon |
This table covers the harness connectors at the Horn Relay. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
One part is listed for the 2018 Audi A8 — STANDARD MOTOR PRODUCTS S3068.
Parking Brake Actuator Connector
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 6.3L W12 | S3239 | 🇲🇽 MX | Rear | View on Amazon |
This table covers the harness connectors at the Parking Brake Actuator. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.
One part is listed for the 2018 Audi A8 — STANDARD MOTOR PRODUCTS S3239.
Repair Harness
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO Fits: 6.3L W12 | V10830094 | 🇲🇽 MX | View on Amazon | |
| VEMO Fits: 6.3L W12 | V10560006 | 🇲🇽 MX | View on Amazon |
This table covers the Repair harnesses.
VEMO supplies both parts for the 2018 Audi A8.
This group includes VEMO V10830094 and VEMO V10560006.
Buying Electrical Connector Parts for a 2018 Audi A8
On this vehicle, the connector system supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules.
- Match the engine first. Every electrical connector part here is engine-specific; each row shows which engine(s) it fits.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, use heat-shrink crimp connectors rather than twist-and-tape for any pigtail splice, especially outside the cabin.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Repair Harness and ABS Wheel Speed Sensor Connector .
Frequently Asked Questions
How many electrical connector parts fit the 2018 Audi A8?
Our catalog currently lists 7 electrical connector parts for the 2018 Audi A8 across 6 subcategories and 2 brands, covering all 3 engine options (3.0L V6 Supercharged, 4.0L V8 Turbocharged and 6.3L W12). Each part is matched to the engine(s) it fits.
Do electrical connector parts differ between 2018 Audi A8 engines?
Yes. Every electrical connector part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of electrical connector problems on a 2018 Audi A8?
Common symptoms include intermittent faults that move when the harness is wiggled, green corrosion inside a plug, or melted connector housings near heat sources. 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, use heat-shrink crimp connectors rather than twist-and-tape for any pigtail splice, especially outside the cabin.
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 2018 Audi A8 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 2018 Audi A8?
First match the engine — each row shows which engine(s) the part fits. Then match the connector by terminal count and keyway, not just appearance — many families look identical but will not lock. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2018 Audi A8
Electrical Connector Parts for Other Audi A8 Years
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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.