Frequently Asked Questions

A body control module is a computer component in an automobile that checks, regulates, and operates electronic devices throughout the car. When electric devices first began being used in cars and trucks, each device was governed by a separate electric component. There was a module for the air-conditioning, a module for the interior lighting, a module for the door locks, and so forth. A body control module gathers all these separate modules under one system so that they function together instead of separately, a format easier to both manufacture and troubleshoot.

If you believe your BCM is the cause of your electrical issues, such as problems with your locks or lighting, SIA Electronics can rebuild or replace it to return things to OE specifications.

An engine control unit (ECU), also known as power-train control module (PCM), or engine control module (ECM) is a type of electronic control unit that determines the amount of fuel, ignition timing and other parameters an internal combustion engine needs to keep running. It does this by reading values from multidimensional performance maps (so called LUTs), using input values (e.g. engine speed) calculated from signals coming from sensor devices monitoring the engine. Before ECU’s, air/fuel mixture, ignition timing, and idle speed were directly controlled by mechanical and pneumatic sensors and actuators.

SIA Electronics repairs and remanufactures ECU/ECM/PCM units. Browse our shop or contact us to get a quote on your make and model.

A transmission control module, or TCM, is a device that controls modern electronic automatic transmissions. A TCU generally uses sensors from the vehicle as well as data provided by the Engine Control Unit to calculate how and when to change gears in the vehicle for optimum performance, fuel economy, and shift quality.

Electronic automatic transmissions have been shifting from purely hydro-mechanical controls to electronic controls since the late 1980’s. Since then, development has been iterative, and today designs exist from several stages of electronic automatic transmission control development. Transmission solenoids are a key component of these control units.

There are two levels of service we provide to our customers. The first option is to rebuild your existing control module. This involves:

• Investigating the trouble codes and symptoms associated with your module.
• External inspection of the module
• Internal inspection and repair, as directed by damage found or manufacturer technical service bulletins
• Functionally testing
• Update the programming on the module
• Functionality retest
• Return it to you

Sometimes your module cannot be repaired in a way that we can warranty. If this is the case, you can purchase a remanufactured module. Remanufacturing involves:

• We purchase a replacement module for you and have delivered to our lab
• Internal inspection and update, as directed by the manufacturer’s technical service bulletins
• Functionality testing
• Update the programming on the module
• Functionality retesting
• Ship it out to you

Each unit we repair or remanufacture is backed by our lifetime warranty against defects in workmanship. To get started, follow the shipping instructions on our rebuild and return page.

There are so many options that it would be almost impossible to keep the inventory up to date on the website. But chances are, if it has wheels and electronics, we have or can get the part you need.

Even if you think yours may be hard to find, give us a call. We can work wonders! Browse our shop to see if yours is already listed.

Here is a partial list of units we have worked on in the past:

• Acura ECM/ECU repairs
• Audi ECM/ECU repair
• BMW ECM repairs
• Buick ECU repairs
• Cadillac ECU repairs
• Chevy/Chevrolet ECM/ECU repairs
• Chrysler ECM/ECU repairs
• Cummins ECU repairs
• Daewoo ECU repairs
• Daihatsu ECU repairs
• Detroit Diesel ECU repairs
• Dodge ECM/ECU repairs
• Eagle ECU repairs
• Ford ECM/ECU repairs
• GEO ECU repairs
• GMC ECU repairs
• Honda ECM/ECU repairs
• Hummer ECU repairs
• Hyundai ECU repairs
• Infiniti ECM/ECU repairs
• Isuzu ECU repairs
• Jaguar ECU repairs
• Jeep ECM/ECU repairs
• Kia ECU repairs
• Land Rover ECU repairs
• Lexus ECM/ECU repairs
• Lincoln ECM/ECU repairs
• Mazda ECM/ECU repairs
• Mercedes ECM/ECU repairs
• Mercury ECM/ECU repairs
• Mitsubishi ECM/ECU repairs
• Nissan ECM/ECU repairs
• Oldsmobile ECU repairs
• Peugeot ECU repairs
• Plymouth ECU repairs
• Pontiac ECU repairs
• Porsche ECU repairs
• Renault ECU repairs
• Saab ECU repairs
• Saturn ECU repairs
• Scion ECU repairs
• Subaru ECM/ECU repairs
• Suzuki ECM/ECU repairs
• Toyota ECM/ECU repairs
• Triumph ECU repairs
• Volvo ECM/ECU repairs
• VW ECM/ECU repairs
• Winnebago ECU repairs
• Yugo ECU repairs
• and virtually every other vehicle!

Turnaround will depend on how busy we are at that time. Turnaround time will also depend on what type of module you have sent to us. A straightforward rebuild will generally be shipped faster than a unit that requires flash reprogramming. Return shipping speed is up to you. Ground shipping to 48 states is included in the repair price. You can pay extra for expedited shipping.

If your unit can’t be repaired to our standards where we can provide a warranty, we may be able to offer a remanufactured replacement instead. We may also discuss alternative options depending on your vehicle and application. Our rebuild and return page goes over options in detail. If you don’t know which option is suitable for your situation, get in touch before shipping your unit, and we’ll be happy to walk you through it.

An FCIM, or fuel injection control module, is the part that regulates fuel injector timing and pressure on Duramax diesel engines. It is a common point of failure on Duramax trucks. If you’re noticing overheating, hard starts, no starts, rough idle, or misfires, contact us to request a quote on Duramx FICM repair.

Digital Motor Electronics, or DME, is BMW’s term for an ECU, ECM, or PCM. It controls fuel delivery, ignition timing, and other engine functions. The team at SIA Electronics repairs and remanufactures BMW DMEs.

The cost of ECU repair will depend on your make and model, the type of module, and what the issue is. A standard diagnostic test fee is $105 for modules that are tested and found to have no issues, and $75 for those that are beyond repair. To get an accurate price, the best option is to get in touch for a quote. Pricing will be confirmed before work begins.

A full replacement with a remanufactured unit is typically more than a rebuild, since it involves sourcing a replacement module along with inspection, programming, and testing. Pricing will depend on your specific vehicle and the availability of a replacement unit. Pricing can vary a lot by make and model, so getting a quote from our team is the fastest way to get an accurate price.

Each ECU we rebuild or remanufacture is covered by our lifetime warranty against defects in workmanship. This will cover parts replacements only, but doesn’t include shipping or labor charges. It also doesn’t transfer with the vehicle if it’s sold. The warranty doesn’t cover water damage, burn damage, physical damage, or problems caused by aftermarket tuners or improper installation.

You can find full details on our warranty and returns page.