Transmission control module replacement typically costs between $800 and $2,500 at a shop, depending on your vehicle make and model, whether the part is new or remanufactured, and whether the shop needs to reprogram it after installation.
The transmission control module (TCM) is a computer that manages how your transmission shifts gears. When it fails, your transmission may shift erratically, stay in one gear, or not shift at all. Replacing it involves buying the part itself, paying for labor to remove and install it, and sometimes paying for reprogramming to match your specific vehicle.
The final bill depends on three things: the part cost, labor time, and whether reprogramming is needed. A new OEM (original equipment manufacturer) part costs more than a remanufactured one. Labor ranges from one to three hours depending on where the module sits in your vehicle. Some vehicles require the module to be programmed at the shop; others do not.
Key Takeaways
- Parts alone range from $300 to $1,500 new, or $200 to $800 remanufactured, depending on your vehicle.
- Labor typically runs $500 to $1,200 because the module is often buried under other components and requires careful removal.
- Reprogramming costs $100 to $300 if your vehicle requires it, and some shops include this in the labor charge.
- Remanufactured modules cost less upfront but may carry a shorter warranty than new parts.
- Getting a quote from your dealership and an independent shop lets you compare both price and warranty coverage.
What the part itself costs
A new OEM transmission control module runs $300 to $1,500 depending on your vehicle. Luxury brands, trucks, and vehicles with complex transmissions (like eight-speed or ten-speed units) sit at the higher end. A Honda Civic TCM might cost $400 new; a BMW or Mercedes TCM can exceed $1,200.
Remanufactured modules cost $200 to $800 for the same vehicles. A remanufactured part has been removed from a salvage vehicle, cleaned, tested, and rebuilt to factory specifications. It performs the same function as a new part but carries a shorter warranty—typically 12 months or 12,000 miles instead of the three-year or 36,000-mile warranty on new parts.
Some shops also offer used modules pulled directly from salvage vehicles, priced at $150 to $400. These carry no warranty and may fail sooner, so most shops recommend against them unless cost is the only factor.
Labor costs and how long the job takes
Labor to remove and install a transmission control module typically costs $500 to $1,200. The time varies because the module's location differs by vehicle. In some cars it bolts to the outside of the transmission and takes 45 minutes to remove. In others it sits inside the transmission pan or under the engine bay, requiring removal of other components first.
A shop will quote you based on the labor time in their manual for your specific vehicle. Most TCM replacements fall between one and three hours of labor. At $100 to $150 per hour (the typical shop rate), that translates to $100 to $450 in labor alone for straightforward jobs, and $500 to $1,200 for complex ones.
Independent shops often charge less per hour than dealerships. A dealership may charge $150 to $200 per hour; an independent shop may charge $80 to $120. This difference can save you $200 to $400 on labor alone, though dealerships may have faster turnaround and more experience with your specific vehicle.
Reprogramming and why some vehicles need it
After a new transmission control module is installed, some vehicles require the module to be programmed to match your car's engine, transmission, and other systems. This step costs $100 to $300 and takes 30 minutes to an hour. Some shops bundle this into the labor charge; others bill it separately.
Whether your vehicle needs reprogramming depends on the make and model. Older vehicles and some domestic trucks do not require it. Many newer vehicles, especially those with adaptive transmissions that learn driving patterns, do require it. Ask the shop whether reprogramming is included in their quote before you commit.
Dealerships always have the equipment and software to reprogram modules. Independent shops may or may not. If an independent shop cannot reprogram your module, you may need to take the vehicle to a dealership for that step alone, which adds time and cost.
Dealership versus independent shop pricing
Dealerships typically charge $1,500 to $2,500 total for a TCM replacement with a new OEM part and reprogramming. Independent shops typically charge $1,000 to $1,800 for the same job. The difference reflects the dealership's higher hourly rate and the fact that they always use new OEM parts and handle reprogramming in-house.
An independent shop using a remanufactured part and charging lower labor rates might quote $800 to $1,200 for the same vehicle. The trade-off is a shorter warranty on the part and potentially less familiarity with your specific model if it is unusual or new.
Get a written quote from both before deciding. The quote should specify the part (new or remanufactured), the labor hours, any reprogramming cost, and the warranty on both parts and labor. This lets you compare not just price but what you are actually getting.
Warranty and what it covers
A new OEM transmission control module typically carries a three-year or 36,000-mile warranty from the manufacturer. The shop's labor warranty is usually 12 months or 12,000 miles. If the module fails within that period due to a defect, the shop replaces it at no charge.
A remanufactured module usually carries a 12-month or 12,000-mile warranty. Some remanufacturers offer longer warranties (up to three years) if you pay extra. Check what the shop is offering before you buy.
Warranty does not cover damage from electrical problems elsewhere in the vehicle. If a faulty alternator or wiring harness damaged the original module, replacing the module alone will not fix the problem—the underlying electrical issue must be repaired first, or the new module will fail too.
Signs your transmission control module is failing
Before you commit to replacement, confirm that the TCM is actually the problem. Common signs include the transmission shifting erratically, staying in one gear, refusing to shift into reverse, or triggering a check engine light with transmission-related fault codes. A scan tool can read the specific code and help pinpoint whether the TCM or another component is at fault.
Other parts can cause similar symptoms: a faulty transmission fluid pressure sensor, a wiring harness problem, or low transmission fluid. A shop should diagnose the problem before quoting you a replacement. Diagnosis typically costs $100 to $200 and is often waived if you have the repair done at that shop.
Frequently Asked Questions
Can I replace the transmission control module myself?
Removal and installation are possible for a mechanically skilled person if the module is easily accessible on your vehicle. However, reprogramming requires specialized software and equipment that most home mechanics do not have. Unless your vehicle does not require reprogramming, you will need a shop for at least that step.
What is the difference between a new and remanufactured transmission control module?
A new module is built by the manufacturer and carries a full warranty. A remanufactured module was removed from a salvage vehicle, cleaned, tested, and rebuilt to factory specs. It performs identically but carries a shorter warranty and costs less. Both are reliable if purchased from a reputable source.
Will my check engine light go off after the module is replaced?
Yes, once the module is installed and reprogrammed (if needed), the shop will clear the fault codes. The light should stay off if the TCM was the only problem. If the light returns, the underlying cause may not have been the module itself.
How long does a transmission control module replacement take?
Most replacements take one to three hours of shop time, depending on the vehicle. Some vehicles require additional time if other components must be removed first. Add time for reprogramming if your vehicle requires it. Total time is usually one business day, though some shops may need two.
Is a transmission control module replacement covered by my car's warranty?
If your vehicle is still under the manufacturer's powertrain warranty, a faulty TCM should be covered at no cost. Check your warranty paperwork or contact your dealership. If you are out of warranty, you pay the full cost.