🔧 What is a BCM (Body Control Module)?
A Body Control Module (BCM) is the central computer that manages and regulates various electronic functions in your vehicle. In the past, each electrical component—such as air conditioning, interior lighting, and door locks—had its own module. Today, the BCM integrates all these functions into a single system, making vehicles more efficient and troubleshooting easier.

🔩 What is an ECU / ECM / PCM?
An Engine Control Unit (ECU)—also known as an Engine Control Module (ECM) or Powertrain Control Module (PCM)—is the brain of your engine. It determines fuel injection, ignition timing, and engine performance by reading sensor data. Before ECUs, these functions were controlled mechanically. Today, electronic control allows for better efficiency, performance, and diagnostics.

⚙️ What is a TCM (Transmission Control Module)?
A Transmission Control Module (TCM) is responsible for managing automatic gear shifts. By using vehicle sensors and ECU data, the TCM optimizes shifting for better fuel economy, performance, and smoothness. Since the late 1980s, electronic transmission controls have replaced older hydro-mechanical systems, making modern transmissions more precise and reliable.

Rebuild vs. Replace: What’s the Difference?

At 305 Auto Electronic, we offer two solutions for faulty control modules:

🔄 Rebuild Your Existing Module

  • Diagnose trouble codes & symptoms
  • Inspect the module externally & internally
  • Repair based on manufacturer guidelines
  • Update & reprogram the module
  • Functionality testing before returning it to you

🆕 Replace with a Remanufactured Module

  • Source a replacement module
  • Update & reprogram according to manufacturer standards
  • Perform full functionality testing
  • Ship it ready for installation

If your module cannot be repaired reliably, a remanufactured replacement is your best option.

Do We Work on Your Vehicle?

If it has wheels and electronics, we can fix it! 🛠️ Our expertise covers a wide range of engine control modules (ECUs), body control modules (BCMs), and transmission control modules (TCMs) for nearly every make and model, including:

đźš— Acura, Audi, BMW, Cadillac, Chevrolet, Chrysler, Cummins, Dodge, Ford, GMC, Honda, Hyundai, Infiniti, Jaguar, Jeep, Kia, Land Rover, Lexus, Mazda, Mercedes, Mitsubishi, Nissan, Porsche, Subaru, Toyota, Volvo, VW, and many more!

Even if your car is rare or hard to find, give us a call—we can work wonders! 📞

How Long Does Shipping Take?

⏳ Turnaround time depends on:

  • The type of module you send
  • Our current workload
  • The shipping speed you choose

We always strive for quick and efficient service so you can get back on the road ASAP! đźš—đź’¨

📦 Need fast service? Contact us today!

📲 305 Auto Electronic – Experts in Automotive Modules & Electronics