Services
Automotive Electronics Repair Services
Relentless Motorsports TX provides automotive electronics repair for supported engine control units, transmission control modules, body control modules and instrument clusters. We also offer in-person vehicle feature coding for supported Porsche, BMW, Lamborghini and Audi vehicles. Nationwide mail-in repair is available for supported modules after compatibility and shipping arrangements are confirmed.
Start with your vehicle details, symptoms and diagnostic findings. We use that information to identify the appropriate service and explain the assessment process. A fault code or symptom alone does not confirm that a control module has failed.
ECU and ECM Repair
The engine control unit, also called an engine control module, manages engine functions using signals from the vehicle’s sensors. When diagnostic findings point to an internal electronics fault, repairing the original module may be an option. We assess supported Toyota, Lexus and exotic-vehicle ECUs and explain repair or remanufacturing options based on the unit’s condition.
Concerns worth discussing include a no-start condition, intermittent operation or loss of communication with the ECU. Similar symptoms can come from power supply, grounding, wiring or other vehicle faults, so include the checks already performed. Send a clear module-label photo and mention any previous repair attempts, water exposure or electrical damage.
ECU Capacitor Repair and Circuit Board Damage
Failed capacitors and related circuit board damage can affect the operation of a supported engine control module. Our ECU capacitor repair service begins with an assessment of the unit and the reported problem. The work required depends on the condition of the components and board; replacing capacitors alone may not address every fault.
If your vehicle has an intermittent electronics issue or a no-start concern, share the diagnostic results before sending the ECU. We confirm whether your module is supported and discuss the next step. Learn more about ECU capacitor repair.
Toyota and Lexus Hard-Shift Repair
Harsh downshifts—a jolt or bang as the transmission shifts into a lower gear—need a careful assessment of the vehicle and its control system. Relentless Motorsports TX offers a proprietary repair service for harsh downshifts in supported Toyota and Lexus applications. We inspect the module and determine the repair needed for its condition.
Tell us which downshifts are affected, when the issue occurs, whether it changes as the vehicle warms up, and which fault codes are present. Include the year, model, transmission details and previous diagnostic or repair work. Mechanical, hydraulic and wiring problems can also cause shifting concerns; compatibility and diagnosis are reviewed before a module is sent. Explore Toyota and Lexus hard-shift repair.
Transmission Control Module Repair
The transmission control module helps manage automatic transmission operation. We offer electronics repair for supported TCMs when diagnostic findings point to the module during investigation of shifting concerns, warning messages or communication faults.
Provide the module part number, fault codes and the results of any power, wiring or transmission checks. We review the application, confirm support and assess the available repair options. The scope of this service is the supported control module; any separate vehicle or mechanical diagnosis should be discussed before proceeding.
Body Control Module Repair
Body control modules coordinate electrical functions throughout a vehicle. On supported applications, we assess module faults after the affected body electronics have been identified. Describe exactly which functions are affected, whether the concern is constant or intermittent, and what your technician has already checked.
Module identification matters because equipment and electronics vary between vehicles. Send the year, make, model and a label photo so we can confirm service availability and recommend the next step.
Instrument Cluster Repair
A blank or intermittent display, gauge concern or other cluster electronics fault can make vehicle information difficult to read. We provide repair services for supported instrument clusters after reviewing the affected functions and the module details.
Tell us which displays or gauges are affected and when the issue appears. Photos or a short description of the behavior, together with diagnostic findings and previous repair history, help us assess whether the cluster is an appropriate candidate for service.
Vehicle Feature Coding
Personalize supported convenience features, displays and vehicle settings on eligible Porsche, BMW, Lamborghini and Audi vehicles. This service uses software configuration to adjust compatible features. Availability depends on the model year and installed equipment, and the vehicle must be present for in-person coding.
Options may include key-fob control of windows or convertible tops, auto stop/start preferences, and compatible startup graphics. Eligible Porsche models may support Sport Plus activation with PDK, or GT3 RS-style steering and G-force displays on supported 991/992 Porsche 911 variants. We review your requested features and explain compatible changes before work begins. Display graphics do not change the vehicle’s model or mechanical specification.
See vehicle feature coding options and appointment requirements.
How to Arrange a Repair
1. Share the vehicle and module details. Send the year, make, model, symptoms, fault codes and a clear module-label photo. Include previous diagnosis, repairs or known damage.
2. Confirm the service and quotation. We review support for the application and explain the assessment and quotation process. Pricing depends on the unit’s condition and work required. Ask about current timing when arranging service.
3. Confirm shipping or an appointment. For mail-in repair, obtain shipping instructions before sending your module. Complete the service agreement and repair intake form as directed. Feature coding is arranged separately and requires the vehicle in person.
Frequently Asked Questions
Can I send a module from another state?
Yes. Nationwide mail-in repair is available for supported modules. Contact us first to confirm compatibility, the scope of work and shipping instructions.
Does a fault code mean my ECU or TCM needs repair?
A code helps identify the affected system but does not, by itself, prove an internal module fault. Send the codes and diagnostic findings so we can discuss the appropriate next step.
Can you quote a repair before seeing the module?
We provide guidance based on the application and information you send. The module’s condition and repair requirements determine the scope and individual quotation. Tell us about previous work or damage at the start.
Can coding be completed by mailing in a module?
Our vehicle feature coding service is performed in person with the vehicle present. Contact us with the features you want to discuss so compatibility and an appointment can be arranged.
Request an Assessment or Quote
Contact Relentless Motorsports TX, call or text (972) 779-6862, or email salesrmstx@gmail.com. Include your vehicle details, symptoms or coding preferences, and any fault codes. Hours: Monday–Friday, 9am–6pm.