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Infiniti M35 Electronic Throttle Body Actuator Connectors

Infiniti M35 Electronic throttle body actuator connectors

Starting at low prices, AutoBuffy stocks multiple electronic throttle body actuator connectors from top OE-quality brands. This connector is the wiring harness plug that links your throttle body's motor and position sensor to the ECU. When it fails, the ECU loses the signal it needs to control airflow, triggering limp mode, rough idle, or a no-start condition on your Infiniti M35.

Signs your Infiniti M35 needs a new electronic throttle body actuator connector

  • Check Engine light with throttle-related codes such as P0120, P0122, P0123, P0222, P0223, or P2135 stored in the ECU
  • Engine enters limp mode and holds RPM near idle regardless of how far the accelerator is pressed
  • Intermittent or complete loss of throttle response, especially after vibration or a cold start
  • Rough, unstable idle that surges or hunts because the ECU receives erratic TPS voltage readings
  • Hard start or no-start condition when the connector's corrosion breaks continuity to the throttle motor circuit
  • Visible melting, heat discoloration, corroded terminals, or a loose fit where the plug meets the throttle body

Which electronic throttle body actuator connector should you buy for your Infiniti M35?

The main decision is whether to buy an OEM-spec pigtail with pre-attached lead wires ready for splicing, a remanufactured connector with terminals pre-loaded, a weather-sealed upgrade connector for harsh environments, or a complete wiring harness repair kit. Match the terminal count and wire gauge to your Infiniti M35's factory plug to ensure proper ECU communication.

OEM-spec pigtail connector
Best for
Straightforward like-for-like replacement on a stock Infiniti M35
What you get
Exact terminal count, correct cavity layout, and pre-attached lead wires matched to factory wire gauge for direct splice-in
Remanufactured connector with pre-loaded terminals
Best for
Restoring a connector damaged by heat or corrosion without cutting into the harness
What you get
Ready-to-crimp terminals already seated in the housing; requires a terminal release tool for precise seating
Weather-sealed upgrade connector
Best for
Infiniti M35 operated in high-humidity, off-road, or extreme-temperature conditions
What you get
IP67-rated housing with silicone wire seals and gold-plated terminals that resist corrosion longer than standard tin-plated contacts
Complete throttle body connector repair kit
Best for
Extensive harness damage or multiple corroded terminals near the throttle body
What you get
Connector housing, all terminals, wire seals, and heat-shrink splice connectors in one package to address widespread wiring damage

Replacing an electronic throttle body actuator connector on a Infiniti M35

Moderate⏱ 45 minutes – 1.5 hoursTerminal release pick or connector removal toolWire stripper and crimping toolHeat gun (for heat-shrink splice connectors)Electrical contact cleanerScan tool for clearing codes and performing throttle relearn

Disconnect the battery before beginning, then depress the connector locking tab and use a terminal pick to release each terminal from the old housing without stretching the wiring. Splice or crimp the new pigtail wires to the harness leads, matching colors and wire gauges precisely, then apply heat-shrink tubing over each splice before reassembling. After reconnecting the battery, perform the throttle body relearn procedure specified for your Infiniti M35 and confirm no fault codes remain with a scan tool.

Frequently asked questions

How much does it cost to replace electronic throttle body actuator connectors on a Infiniti M35?
The part itself starts at low prices at AutoBuffy. A shop will typically charge 30–60 minutes of labor on top of the part cost because access to the throttle body varies by engine layout. Doing it yourself keeps the total cost close to the part price alone, making this one of the more affordable electrical repairs on a Infiniti M35.
Can a bad throttle body actuator connector cause limp mode on a Infiniti M35?
Yes, and it is one of the most common causes. When the connector loses continuity or delivers erratic voltage, the ECU cannot confirm throttle position and defaults to limp mode as a safety measure. Clearing the code without fixing the connector will not resolve the condition — the Infiniti M35 will return to limp mode as soon as the fault reoccurs.
Can I repair the connector instead of replacing it on my Infiniti M35?
Minor corrosion on terminals can sometimes be cleaned with electrical contact cleaner and a small wire brush, but a cracked housing, melted plastic, or a terminal that no longer locks will not hold a reliable repair. Replacing the pigtail or full connector is the correct fix, since an intermittent connection can cause the same driveability symptoms and ECU codes to return on your Infiniti M35.
How do I know if the connector is the problem and not the throttle body itself on a Infiniti M35?
Wiggle the connector while watching live throttle position sensor data on a scan tool. If the voltage reading spikes or drops when you flex the connector or harness, the fault is in the connector or its wiring, not the throttle body. A steady abnormal voltage that does not change with movement points toward the throttle body sensor or motor itself.
Do I need to relearn or reset the throttle body after replacing the connector on a Infiniti M35?
In most cases, yes. Once power is restored cleanly through the new connector, the ECU needs a throttle body relearn to recalibrate the idle control position. The procedure varies by make and model, but it typically involves a specific key-on sequence or a short idle cycle with no driver input. Check your Infiniti M35's service information before clearing codes and test-driving.
What causes the electronic throttle body actuator connector to fail on a Infiniti M35?
Heat soak from prolonged engine operation is the primary cause — the connector sits close to the intake and can become brittle and porous over time. Road debris, moisture intrusion, and vibration accelerate terminal corrosion and housing cracking. On higher-mileage examples of the Infiniti M35, repeated temperature cycling weakens the terminal retention clips until the connector no longer seats securely.

More parts for your Infiniti M35

Stabilizer Bar Bushing KitEngine Cylinder Head GasketStarterControl Arm SetTransmission MountEngine Crankcase Vent ValveBrake Light SwitchControl Arm

Electronic throttle body actuator connectors for other Infiniti models

Infiniti FX35Infiniti I35Infiniti G35