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Audi S8 Air Charge Temperature Sensor Connectors

Audi S8 Air charge temperature sensor connectors

Starting at $8.95, AutoBuffy stocks 5 air charge temperature sensor connectors from Standard Ignition and ACDelco. This connector links the air charge temperature (ACT) sensor to the engine control module, feeding real-time intake air temperature data used to calculate fuel trim and ignition timing. A corroded or broken connector causes the ECM to lose that signal, triggering misfires, poor fuel economy, and a check engine light.

Signs your Audi S8 needs a new air charge temperature sensor connector

  • Check engine light on with a stored P0112, P0113, or P0097/P0098 intake air temperature fault code
  • Rough idle or stumbling acceleration caused by the ECM defaulting to a fixed air temperature value instead of live data
  • Noticeably richer or leaner fuel mixture leading to black smoke from the exhaust or a strong fuel smell
  • Hard cold starts because the ECM cannot accurately adjust the cold-start fuel enrichment strategy
  • Failed emissions test due to incorrect fuel trim caused by a missing or erratic ACT signal
  • Visible corrosion, melted plastic, or a broken locking tab on the connector body near the intake air duct

Which air charge temperature sensor connector should you buy for your Audi S8?

The main decision is whether you need an exact OEM-spec pigtail connector, a universal repair connector, or a full wiring harness repair kit. Fitment precision matters here because pin count, terminal size, and connector body shape must match your specific sensor to ensure a weatherproof, low-resistance connection. Check your existing connector's pin count and wire gauge before ordering.

OEM-style direct-fit pigtail
Best for
Straightforward swap with no splicing needed
What you get
Pre-terminated connector molded to match factory specs; plug-and-play replacement with correct pin count and locking tab
Universal repair connector
Best for
Budget fix when exact fitment pigtail is unavailable
What you get
Generic weatherproof connector with bare wire leads; requires matching pin count and crimping or soldering to existing wiring
Connector with integrated wire leads (6–12 in.)
Best for
Damaged or melted wiring extending beyond the connector
What you get
Extra wire length lets you cut back burned insulation and splice cleanly without reaching deep into the harness
Full sensor-and-connector kit
Best for
Simultaneous connector and sensor failure
What you get
Matching sensor and pigtail sold together, ensuring electrical compatibility and eliminating a second diagnostic trip

Air charge temperature sensor connectors brands we stock for your Audi S8

Standard Ignition
4 options · from $8.95
ACDelco
1 option · from $10.95

Replacing an air charge temperature sensor connector on a Audi S8

Easy⏱ 30–60 minutesOBD-II scanner (to read and clear codes)MultimeterWire stripper and crimping tool or soldering ironElectrical contact cleanerDielectric grease

Disconnect the battery negative terminal, then unplug the damaged connector from the ACT sensor and cut back the wiring to clean, undamaged insulation. Attach the new pigtail connector by crimping or soldering the wire leads, apply dielectric grease to the terminals, and snap the connector firmly onto the sensor until the locking tab clicks. Reconnect the battery, clear stored fault codes, and confirm the repair with a test drive and a recheck for pending codes.

Frequently asked questions

How much does it cost to replace air charge temperature sensor connectors on a Audi S8?
The connector itself starts at $8.95 at AutoBuffy. Adding professional labor typically raises the total, though most shops treat this as a minor wiring repair billed at under one hour. DIY replacement keeps the cost at just the part price, making it one of the more affordable fixes for a fuel-trim-related check engine light.
Can a faulty ACT sensor connector cause a failed emissions test on a Audi S8?
Yes. A broken or corroded ACT sensor connector sends an erratic or missing signal to the ECM, which distorts fuel trim calculations. This can push hydrocarbon or CO readings above legal limits and will typically set a readiness monitor to 'not ready,' both of which result in an automatic emissions failure.
Is it safe to drive a Audi S8 with a bad air charge temperature sensor connector?
Short-term driving is possible because the ECM will substitute a default air temperature value, but fuel economy and performance will suffer. Extended driving with an incorrect fuel trim can cause catalytic converter damage over time. Replacing the connector promptly is low-cost and prevents more expensive downstream repairs.
How do I know if the connector is the problem and not the ACT sensor itself on my Audi S8?
Unplug the connector and inspect terminals for green corrosion, bent pins, or heat damage. Use a multimeter to check for continuity and proper resistance at the connector terminals against your sensor's spec. If resistance reads correctly at the sensor but an open circuit appears at the connector, the connector — not the sensor — is the fault.
Will any ACT sensor connector fit my Audi S8, or does it have to match exactly?
It must match in pin count, terminal size, wire gauge, and connector body shape. Using the wrong connector risks a poor seal that allows moisture intrusion, increased contact resistance that skews sensor readings, or terminals that seat incorrectly and cause intermittent faults. Always use the Audi S8-specific fitment filter when ordering.
Do I need to reprogram or reset anything after replacing the air charge temperature sensor connector on a Audi S8?
No reprogramming is required. After installation, clear any stored fault codes with an OBD-II scanner and run the engine through a warm-up cycle so the ECM can relearn live ACT data and reset fuel trim. If the same codes return after clearing, the sensor itself may also need replacement.

Shop air charge temperature sensor connectors by year for the Audi S8

200320022001

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Air charge temperature sensor connectors for other Audi models

Audi 5000Audi 100 QuattroAudi 4000 QuattroAudi 4000Audi A7 QuattroAudi 80