What Does a Wastegate Actuator Do?
The wastegate actuator is part of the turbocharger’s boost-control system. It responds to pressure from the boost-control system and moves the wastegate mechanism when the appropriate conditions are reached.
The wastegate controls how much exhaust gas is directed through the turbocharger turbine. Proper actuator operation is therefore important to the turbocharger’s ability to regulate boost.
A faulty actuator can contribute to turbocharger control problems, including abnormal boost behavior or inconsistent turbocharger operation.
Durable Metal Construction
The replacement actuator is manufactured from metal for durability and long service life.
It is intended to replace the original actuator while retaining the existing turbocharger’s wastegate mechanism and related components, provided the vehicle and turbocharger configuration are compatible.
Package Contents
Each package includes:
- 1 × Turbocharger Wastegate Actuator
- 2 × Nuts
- 1 × Retainer
The package does not include a complete turbocharger.
Product Specifications
| Specification | Details |
|---|---|
| Product Type | Turbocharger Wastegate Actuator |
| OE Replacement Number | 55589100 |
| Alternate Part Number | 667-714 |
| Alternate Part Number | 667714 |
| Construction | Metal |
| Quantity | 1 Actuator |
| Included Hardware | 2 Nuts, 1 Retainer |
| Warranty | 12 Months |
| Application | Select Chevrolet & Buick Turbocharged Vehicles |
Installation Considerations
Replacing a wastegate actuator involves working around the turbocharger and exhaust system, so allow the vehicle to cool completely before beginning work.
Before installation:
- Verify the original actuator part number.
- Confirm the vehicle and turbocharger application.
- Compare the replacement actuator with the original component.
- Inspect the wastegate linkage and mounting points.
- Install the actuator and supplied hardware according to the appropriate service procedure.
- Verify correct wastegate actuator movement and adjustment before operating the vehicle.
Important: Wastegate actuator adjustment can affect turbocharger boost control. Follow the vehicle or turbocharger manufacturer’s service specifications rather than assuming the replacement actuator should be adjusted identically on every application.
Symptoms of a Faulty Wastegate Actuator
A wastegate actuator problem may be associated with symptoms such as:
- Inconsistent boost
- Reduced turbocharger performance
- Boost-control issues
- Check-engine-light conditions
- Turbocharger-related diagnostic trouble codes
- Wastegate linkage that does not operate correctly
These symptoms can also be caused by other turbocharger or boost-control components. Proper diagnosis is recommended before replacing the actuator.
Frequently Asked Questions
What vehicles does this wastegate actuator fit?
The supplied fitment covers 2011–2015 Chevrolet Cruze, 2016 Cruze Limited, 2012–2020 Chevrolet Sonic, 2013–2021 Chevrolet Trax, and 2013–2021 Buick Encore.
What is the OE part number?
The primary replacement number is 55589100. The listing also identifies 667-714 and 667714 as replacement numbers.
Is this a complete turbocharger?
No. This is a turbocharger wastegate actuator only.
What comes with the actuator?
The package includes the actuator, two nuts, and one retainer.
Is the actuator adjustable?
Wastegate actuator adjustment varies by turbocharger and application. Follow the appropriate manufacturer service specifications rather than using a universal adjustment setting.
How do I know if this fits my vehicle?
Start by checking your original actuator for 55589100 and compare the vehicle application. Because turbocharger configurations can vary, verify the OE number and physical configuration before ordering.
Does this replace 667-714?
Yes. The supplied listing identifies 667-714 / 667714 as alternate replacement numbers for this actuator.
Does the product include a warranty?
The supplied listing states that the product includes a 12-month warranty.
Restore Turbocharger Wastegate Control
If the original wastegate actuator on your compatible Chevrolet or Buick turbocharged vehicle is no longer functioning correctly, this 55589100 turbocharger wastegate actuator replacement provides a direct replacement-oriented solution.
With metal construction, supplied mounting hardware, and coverage for select Cruze, Cruze Limited, Sonic, Trax, and Encore applications, it’s designed to get the turbocharger’s wastegate control mechanism back in service.
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