Skip to main content
+48 888 638 546
sale@ecusale.com
English €
Open search engine
Search
Close search engine Clear Search
Products in the cart: 0. See details
Your cart is empty

Renault Transmission Control Units (TCU)
Filters
Subcategories
Filters

in category: Renault Transmission Control Units (TCU)

Back to: Transmission Control Units (TCU)
  • Renault Transmission Control Units (TCU)
Products: None

Transmission control units for Renault

This category contains used, tested automatic transmission control units (TCU) for Renault. It currently holds a Siemens SIM82 module with numbers S120217301C, HW 9640922780 and SW 9658917080, listed as fitting Citroën and Renault.

Choose the control unit by the numbers on its label. Other makes are listed in the transmission control units category.

Looking for a transmission control unit for another Renault? Send a photo of the control unit label →

Products: None

List of products

There are currently no products in this category

Renault transmission control unit in stock

A transmission control unit (TCU) controls gear changes in an automatic gearbox, based on sensor signals and data from other control units. A Siemens module label carries several numbers: the module number (here S120217301C), the HW hardware number, the SW software number and the family marking, e.g. SIM82.

Marking Number
Module number S120217301C (S120217301)
HW hardware number 9640922780
SW software number 9658917080
Family Siemens SIM82

How to choose a transmission control unit for a Renault

Compare the module number and the HW and SW numbers with the label on your control unit. The same car may have had different software versions, and a unit with a different SW may not work correctly with the gearbox and the other modules. The VIN helps confirm the vehicle version but does not replace the label numbers. If the numbers do not match, send us a photo of the label – we will check what can be matched.

See: Siemens SIM82 transmission control unit S120217301C / HW 9640922780 / SW 9658917080 – Citroën, Renault.

More Siemens SIM82 family units are in the Citroën transmission control units category.

Symptoms of a faulty transmission control unit

  • gearbox limp mode – driving in one gear only,
  • flashing warning light or gearbox fault message,
  • jerky or delayed gear changes,
  • no communication with the transmission control unit in diagnostics.

Low or degraded oil, faulty solenoid valves in the gearbox or the wiring can cause similar symptoms – so run diagnostics before you buy. Engine control units for Renault are in the Renault engine control units category, and ABS pumps in Renault ABS pumps.

Testing, warranty and delivery

Every module is checked before dispatch on a test bench – connected to power and diagnostic tools. The warranty period and terms are given in each product description. Before ordering you can check delivery times and costs, payment methods and our returns and complaints policy.

Can't find your part number?

Send us a photo of the full label on your original module and details of the vehicle or machine. We will check the numbers and availability.

Ask about a Renault transmission control unit →

FAQ – Renault transmission control units

Question Answer
Which numbers matter most? The module number (e.g. S120217301C) and the HW and SW numbers on the label. All of them should match your control unit.
Does a Citroën control unit fit a Renault? This module is listed as fitting both makes. What decides is whether the HW and SW numbers match your control unit.
Is adaptation needed after fitting? Depending on the car, a gearbox adaptation in diagnostics may be needed after replacement. Check with your workshop before fitting.
Is the control unit checked before dispatch? Yes, every module is tested before dispatch.

    Blog about ECU Engine Controllers and Automotive Electronics
    Go to the Blog

    • Opel Corsa D 1.3 CDTI ECU flooded with water – refurbished VIRGIN and cloning

      ECU Diagnostics and Repair 25-10-2026

      Opel Corsa D 1.3 CDTI ECU flooded with water – refurbished VIRGIN instead of used

      The engine ECU of the Corsa D 1.3 CDTI sits in the cowl area under the windscreen and is often flooded with water. Find out where the fault comes from, how we refurbish ECUs and why a refurbished VIRGIN unit is safer than a used one.

      • where the water comes from and what the symptoms are,
      • what to check on the injectors before replacing the ECU,
      • how we refurbish and seal our ECUs,
      • how VIRGIN, cloning and VIN matching work,
      • the most popular numbers: 55568383 KZ, 55198930 CN, 55568385.

      A refurbished VIRGIN ECU ready to fit costs from 190 to 230 euro.

      Read more
      EcuSale

    • Frost, Snow and Moisture: Why Do ECU, BCM and ABS Pump Faults Occur in Winter?

      ECU Diagnostics and Repair 11-10-2026

      Why Do Engine ECU and Vehicle Electronics Faults Occur in Winter?

      ABS and ESP warning lights and the engine management light coming on after a cold night do not necessarily mean that a control unit has failed. Voltage drops, a discharged or ageing battery, moisture or water entering the vehicle’s electronic modules may be the cause.

      In this ECUSale guide, we look at problems affecting engine ECUs in the Audi Q7 and Opel Corsa D 1.3 CDTI, as well as Volkswagen ABS pumps. We also explain how to recognise a water-damaged control module and what to check before replacing it.

      Read more
      ECUSale - Technical Team

      Automotive Electronics Manufacturers

      ECU Engine Controllers, ABS Pumps, BCM Modules and automotive electronics.

      FAQ – Frequently Asked Questions

      1. Are the products tested before shipping?

      Yes, every ECU engine controller, BSI module, BCM module, ABS module, transmission control unit, and other automotive electronic module is electronically tested before shipment. Each unit is checked for proper communication and correct operation to ensure you receive a fully tested product ready for installation.

      2. Does the ECU engine controller require programming or coding after installation?

      Whether programming or coding is required depends on the version of the product. We offer VIRGIN, IMMO OFF, and Plug & Play ECU engine controllers. Information about any required programming or coding is always clearly stated in the product description. In many cases, the unit can be installed and used without any additional coding or adaptation.

      3. How do I choose the correct part for my vehicle?

      The most important step is to compare the part numbers found on your original unit. Pay special attention to the Bosch, Siemens, Magneti Marelli, Continental, or vehicle manufacturer's OEM part number. If you are unsure, simply send us a photo of your existing module or provide your vehicle's VIN, and our specialists will help you identify the correct part.

      4. Are the products covered by a warranty?

      Yes, all ECU engine controllers, ABS modules, BCM modules, BSI modules, transmission control units, and other automotive electronic modules offered in our store are covered by a warranty. Every product is carefully tested and prepared before shipment. If you experience any issues, our technical support team is available to assist with diagnostics and help resolve the problem quickly and efficiently.

      5. What payment methods are available in the store?

      We offer secure online payments processed through Stripe and PayPal. Customers can pay using a credit or debit card, Apple Pay, Google Pay, Klarna, online banking payments, or a traditional bank transfer. After placing an order, you will receive a secure payment link to complete your purchase safely and conveniently.