Throttle Body for Vauxhall Astra J K, Insignia A, Meriva B, Mokka, Zafira C | Replaces 55496779

The electric throttle body (OEM 55496779) is a precision-engineered airflow control unit designed to regulate the amount of air entering the engine on several Vauxhall/Opel diesel vehicles, including Astra J & K, Insignia A & B, Meriva B, Mokka/Mokka X, Antara, Zafira C and related models. This throttle body is electronically controlled and works in conjunction with your vehicle’s engine management system to provide smooth acceleration, accurate idle control and optimal combustion — helping resolve symptoms such as rough idle, poor throttle response, error codes and limp-home mode caused by wear or failure of the original unit. It directly replaces OEM numbers like 55496779 / 55491244 and fits a wide range of 1.6 CDTi and 2.0 CDTi diesel engines when matched to the correct vehicle and engine code.

OEM Number: 055491244, 0817090, 0825048, 817090, 825048, 55496779, 55491244, 55570009, 55578278, 055496779

Number Of Pins : 6-pin Connector

Operating Mode : Electric

Quantity : 1

Our SKU: TVAU55496779_94 

All our Throttle Body For Vauxhall Astra J K Insignia A Meriva B Mokka Zafira Tourer C are OEM quality and reliable after market car parts. This Throttle Body For Vauxhall Astra J K Insignia A Meriva B Mokka Zafira Tourer C is specifically compatible with Opel: Astra, Astra J, Insignia, Meriva, Mokka / Mokka X, Zafira Tourer, .

Please use our make-model-year tool to check this part's compatibility with your vehicle. However, please note that our tool is for reference only and we recommend that you check the part number on your old unit prior to purchasing.

If you are still not sure about the compatibility of this part to your vehicle, please supply us with the VIN number or Reg number in our live chat or contact form! You can also find details on our purchasing & shipping guide here.

Key Benefits

✔ OEM-Compatible Replacement
Replaces original equipment part numbers 55496779 and 55491244 for direct fitment on compatible diesel Vauxhall/Opel models.

✔ Restores Accurate Airflow Control
Precisely manages airflow into the intake based on electronic throttle commands, improving engine response and idle stability.

✔ Solves Common Driveability Issues
Replacing a worn or faulty throttle body often clears fault codes, rough idling, hesitation under acceleration and “limp mode” related to incorrect air-mass readings.

✔ Improves Engine Efficiency
Correct airflow regulation helps the ECU achieve optimal combustion and fuel-air mixture, potentially improving fuel economy and emissions.

✔ Durable & Reliable Design
Designed to withstand repeated actuation and the harsher conditions inside the intake system of modern diesel engines.

Frequently Asked Questions

Q: What does a throttle body do?
A throttle body controls the amount of air entering the engine’s intake manifold by opening or closing a valve based on electronic signals, directly affecting engine power, throttle responsiveness and idle performance.

Q: What are signs my throttle body (55496779) is failing?
Typical symptoms include rough or unstable idling, hesitation when accelerating, reduced performance, warning lights, or the car entering “limp mode” — often linked to incorrect airflow measurements or sensor errors.

Q: Which vehicles does this part fit?
This unit fits various Vauxhall/Opel diesels, including Astra J & K, Insignia A & B, Meriva B, Mokka/Mokka X, Zafira C Tourer, Antara and similar models with compatible 1.6 CDTi or 2.0 CDTi engines, when the OEM part number matches 55496779 / 55491244.

Q: Do I need recalibration after replacing it?
After replacement, your vehicle’s ECU may require a throttle relearn or idle adaptation to optimise performance; consult a technician if needed.

Q: Can cleaning fix the problem instead of replacing?
Cleaning carbon build-up on the throttle body can sometimes temporarily improve symptoms, but a worn or electronically faulty unit will usually need full replacement for a lasting fix.