Volvo D12 | 3964402 | VED12 | ECM Repair

Original price was: $799.00.Current price is: $699.00.

Volvo VED12, D12 ECM Repair Service.  Your ECM will be returned fully reconditioned, tested and ready to be installed back to the same vehicle it came off, saving you the time & the expense of having a new ECM programmed to your vehicle. P/N:  D12082271, 3964402, 1637374, 1637380, 1637981, 3964440, 3964457, 3964472

We first diagnose the unit, if it’s not repairable or no problems are found the cost is $200 and shipping cost. In this case we will process a partial refund with the difference.


Volvo VED12 with plate number D12 ECM can be repaired with our fully reconditioned and tested ECM. It saves your time and expense of programming a new ECM. The ECM model number is D12082271, and the part numbers are 3964402 and 3964472.

We first diagnose the unit, if it’s not repairable or no problems are found the cost is $200 and shipping cost. In this case, we will process a partial refund with the difference.

Engine Model D12
Serial# D12082271 | D12043819
Part#1637374 | 1637380 | 1637981 | 1637473

Volvo VE D12:

The Volvo VED12 is a 12-liter inline six-cylinder diesel engine that was introduced in the mid-1990s. It features electronic controls and fuel injection systems to optimize fuel efficiency and power output. The VED12 was commonly used in Volvo VN, VNL, and VT series trucks.

D12, D13 – Important Applications:

– Long-haul transportation: The VED12 engine is well-suited for long-haul trucking due to its excellent fuel efficiency and high torque output.
– Construction and heavy-duty applications: Its robust design and high torque make it suitable for heavy-duty applications such as construction, logging, and mining.

Volvo D12A:

The Volvo D12A is a predecessor to the VED12 and was widely used from 1993 to 2005. It shares many similarities with the VED12 in terms of performance and applications.

Important Applications:

– Regional and local transportation: The D12 engine is often found in regional and local transportation trucks due to its balance between fuel efficiency and power.
– City buses: Its compact size and good fuel economy make it a popular choice for city bus applications.

Volvo D12B:

The Volvo D12B is another variant of the D12 series and was available from the late 1990s to the mid-2000s. It offers improved performance and increased horsepower compared to the D12A.

Important Applications:

– Long-distance hauling: The D12B engine’s increased horsepower and torque make it suitable for long-distance trucking, providing ample power for steep inclines and heavy loads.
– Intermodal transportation: Its versatility and power output make it a preferred choice for intermodal operations involving container hauling and rail transport.

Volvo D12C:

The Volvo D12C is a later version of the D12 series and was introduced in the early 2000s. It incorporates advanced technologies for improved fuel efficiency, emissions control, and overall performance.

Important Applications:

– Eco-friendly transportation: The D12C engine complies with stricter emission standards, making it ideal for environmentally conscious applications.
– Refrigerated transport: Its ability to maintain consistent power output at varying loads and temperatures makes it suitable for refrigerated transport where precise temperature control is crucial.

The Volvo VED12, D12 engine is equipped with an ECM (Electronic Control Module) manufactured by Volvo. This ECM manages and controls various engine functions, including fuel injection timing, air intake, and emissions control. It receives input from various sensors located throughout the engine and adjusts engine operating parameters accordingly.

The Volvo D12 engine was used in various applications, including heavy-duty trucks, buses, and construction equipment. It was produced in several variants, ranging in output from 335 to 465 horsepower. The D12 engine was available in both Euro 3 and Euro 4 emissions standards.

Volvo ECM Part Reference number:

1637928, 3964402, 1677902, 03161962
85000846, 8148558

Volvo 8148558


A 1-year warranty even backs our ECM repair service. Our experts not only repair your ECM but also ensure that it’s built for reliability and long-lasting performance.

Common Problems
  • Blowing fuses
  • No communication
  • Engine shutting down
  • Fault codes in unit
  • Intermittent faults
  • Oil intrusion 
  • Water damaged
  • Injector driver faults

All you need to do is ship your unit to us and we diagnose the faults and ship the fixed unit back to you free of shipping cost.

Why trust us

Our engineering team has over 15 years of experience and more than 10K repaired ECMs and the latest simulation technology. we are always happy to assist you with any technical assistance we can. Feel free to contact us if you wish to discuss the faults you are experiencing before sending in your parts.

ECM Engineering USA / ECM Repair USA

4 Steps

Additional information

Weight160 oz
Dimensions11 × 14 × 17 in