Transmission Control Unit Repair to Restore Gearbox Performance Without Replacement

✅ Lifetime Warranty on All Repairs

⚡ 24-Hour Testing on Catalogue Units – Or It’s Free

🚚 Optional UK-Wide Courier Collection

Reliable Transmission Control Unit Repair by ECU Fix

When your transmission control unit (TCU) fails, you may experience delayed gear shifts, warning lights, or even a complete loss of drive. These issues can quickly make your vehicle unsafe or undriveable. That’s why ECU Fix offers fast, cost-effective transmission control unit repair—without the high cost or delays of full replacement.

If your unit is listed in our online repair catalogue, we’ll test it within 24 hours—or your repair is completely free. Even if it’s not listed, we can usually still test and repair your TCU. Simply send us your vehicle details or part number, and we’ll confirm compatibility.

In addition, every repair comes with a lifetime warranty, so you can drive away with total peace of mind.

Why Choose ECU Fix for Transmission Control Unit Repair?

  • ⚡ 24-Hour Testing on catalogue TCUs—or your repair is free
  • 🛡️ Lifetime Warranty on all completed repairs
  • 🚚 UK-Wide Courier Collection available on request
  • 🧰 All diagnostics and repairs handled in-house by experts
  • 💷 No Fix, No Fee – you only pay collection & return shipping if repair isn’t possible

Common Transmission Control Unit Faults We Repair

Your TCU may be faulty if you notice the following symptoms:

  • Harsh, delayed, or unpredictable gear changes
  • Gearbox stuck in one gear or enters limp mode
  • Transmission warning light or fault codes
  • TCU fails to communicate with diagnostics
  • Car won’t go into drive or reverse
  • Loss of shifting logic or irregular performance

Fortunately, most of these issues can be fixed through expert transmission control unit repair, often more quickly than you might expect.

How Our TCU Repair Process Works

1. Start Your Booking

Getting started is easy. You can:

2. Arrange Courier Collection (Optional)

If it’s more convenient, we’ll arrange secure collection from anywhere in the UK. Or, you can send your unit directly to us.

3. We Test and Repair Your Unit

  • If it’s a catalogue-listed unit, we test it within 24 hours—or the repair is free
  • If it’s not listed, we’ll still test and attempt repair
  • If it cannot be repaired, you’ll only pay for return shipping—no hidden fees

4. Receive and Refit

We’ll return your fully tested and repaired TCU, ready for reinstallation and protected by our lifetime warranty.

Why Choose Repair Over Replacement?

Replacing a TCU often costs between £500 and £1,500, not including potential coding or dealer setup fees. By choosing ECU Fix, you save both time and money. Our transmission control unit repair service is fast, reliable, and in most cases, it eliminates the need for recoding. Best of all, every repair includes a lifetime guarantee, so you’re protected long term.

GET IN TOUCH

Book your ECU repair today!

Contact us

Can a transmission control module be repaired?

Yes, in most cases you can repair a transmission control module. At ECU Fix, our technicians test and fix faulty TCUs using advanced diagnostics. Instead of replacing the unit, we restore its function—saving you time and money.

How much does it cost to repair a transmission control module?

Our transmission control module repair service starts at £200. The exact cost depends on the fault and the vehicle. If your TCU is listed in our catalogue, we’ll test it within 24 hours—or your repair is free. Every successful repair includes a lifetime warranty.

What happens when a transmission control module fails?

When the TCU fails, you may notice hard or delayed gear changes, limp mode, or complete loss of drive. The car might also display warning lights or fault codes. In some cases, the gearbox won’t respond at all. Getting the unit tested and repaired quickly prevents further damage to the transmission.

Can I drive my car with a bad transmission control module?

You might still be able to drive, but it’s not safe. A faulty TCU can cause unpredictable shifting or leave the car stuck in one gear. This puts extra strain on the transmission and increases the risk of a breakdown. We recommend repairing the unit as soon as possible.transmission system.