ECU Engine controller Volkswagen Passat Jetta Seat Toledo 1.8 443907403G Bosch 0280000739
Which models use ECU 443907403G / Bosch 0280000739?
This ECU Engine controller is commonly listed for selected Volkswagen Passat and Volkswagen Jetta vehicles, and it is also found in some Seat Toledo 1.8 applications. The safest way to confirm compatibility is to match the numbers on your original unit.
You may see the same identifiers written differently, for example 443 907 403 G or Bosch 0 280 000 739—these are simply alternate label formats.
What do the numbers 443 907 403 G and 0 280 000 739 mean on the label?
443907403G is the vehicle manufacturer-style part number, while 0280000739 (often shown as 0 280 000 739) is the Bosch reference. Matching both references helps you choose the correct ECU version for your Volkswagen Passat or Jetta.
Even similar-looking ECUs can differ in configuration or software, so the exact combination 443907403G + 0280000739 matters.
What does the engine ECU actually do in a Passat/Jetta 1.8?
The engine ECU controls key engine functions during driving. It processes sensor data and manages items such as fuel delivery and ignition timing to keep the engine running smoothly.
That is why choosing the correct ECU by number—such as 443907403G and Bosch 0280000739—is essential for proper operation.
Typical symptoms of a faulty ECU (443907403G) in Volkswagen Passat/Jetta
A failing ECU can cause hard starting, rough running, power loss, stalling, or a Check Engine light. In some cases, diagnostics may show inconsistent fault codes or communication issues.
This unit is offered as a tested product with warranty and fast shipping to help you replace the ECU with more confidence.
Does Bosch ECU 0280000739 require coding/adaptation after installation?
Depending on the vehicle version and its electronic setup, an ECU replacement may require adaptation or coding after installation. This is most common when the ECU must be matched to other modules in the vehicle.
Exact part number matching (443907403G and 0280000739) makes installation and later operation much easier.