What is an accelerator cable?

The accelerator cable, also known as the throttle cable, connects the accelerator pedal to the engine’s throttle body or carburettor. When you press the pedal, the cable pulls the throttle open, increasing airflow into the engine and making the car accelerate. If the cable wears out, stretches, or snaps, you may lose control of throttle response.

Why do you need an accelerator cable?

The accelerator cable is essential for controlling engine speed. A worn or frayed cable can stick, delay throttle response, or even break completely, leaving you unable to accelerate. Replacing it ensures smooth pedal operation, consistent acceleration, and safe driving.

Common signs your accelerator cable needs replacing

• Sluggish or delayed response when pressing the accelerator pedal
• Pedal feels stiff, sticky, or unusually loose
• Engine fails to respond smoothly to pedal input
• Visible fraying, kinks, or damage to the cable sheath
• In severe cases, the pedal goes to the floor with no engine response

If you notice these issues, it’s important to have the cable inspected before it fails completely.

What happens during an accelerator cable replacement?

A mechanic will disconnect the worn cable from the accelerator pedal and throttle body or carburettor. The new cable is then routed through the firewall and engine bay, adjusted to the correct tension, and tested to ensure smooth, responsive operation. The pedal movement is checked to confirm full throttle range without sticking.

How much does an accelerator cable replacement cost?

Replacing an accelerator cable in New Zealand typically costs between $180 and $350, depending on the make and model of the vehicle. Some modern vehicles use electronic throttle systems (drive-by-wire) instead of cables, which may require different repairs. You’ll always receive an upfront quote before any work begins.

Is it safe to drive with a faulty accelerator cable?

No. A sticking or broken accelerator cable can cause dangerous driving conditions — either preventing you from accelerating or leaving the engine revving unexpectedly. If you suspect your cable is worn, it’s best to have it replaced immediately to avoid sudden failure on the road.