Ablauf
Jerky gear changes or emergency mode? We can repair your gearbox control unit.
Whether it’s severe jerking when pulling away, erratic gear changes or the reverse gear failing completely – a faulty transmission control unit (TCU/TCM) makes driving a nightmare and puts the transmission at risk. Particularly affected are the Mercedes VGS 722.8, the 9G-Tronic (725) and the VAG DSG gearboxes DQ381 and DQ500. Save yourself the expense of a complete replacement from the manufacturer! Revonik GmbH repairs your control unit at component level – quickly, reliably and up to 70% cheaper. Includes a 24-month warranty and 100% Plug & Play. For private and commercial use.
Ihre Vorteile bei der
Transmission Control Unit Repair
Significant cost savings (up to 70% cheaper than a brand-new genuine part from Mercedes or VW/Audi)
We operate on a fee-only basis, charging solely for our time and expertise. This model eliminates any commission-based conflicts, aligning our success directly with your financial progress.
24-month warranty (on all repairs carried out)
We operate on a fee-only basis, charging solely for our time and expertise. This model eliminates any commission-based conflicts, aligning our success directly with your financial progress.
Fast service (standard repair: 2–4 working days; express repair available within 48 hours for an additional charge)
We operate on a fee-only basis, charging solely for our time and expertise. This model eliminates any commission-based conflicts, aligning our success directly with your financial progress.
Specialist expertise (experts in Mercedes 9G-Tronic, VGS 722.8 and VAG DSG DQ381/DQ500)
We operate on a fee-only basis, charging solely for our time and expertise. This model eliminates any commission-based conflicts, aligning our success directly with your financial progress.
100% Plug & Play (No need for costly programming or coding at an authorised workshop)
We operate on a fee-only basis, charging solely for our time and expertise. This model eliminates any commission-based conflicts, aligning our success directly with your financial progress.
Data transfer & cloning (in the event of irreparable damage, we clone your data to a replacement device)
We operate on a fee-only basis, charging solely for our time and expertise. This model eliminates any commission-based conflicts, aligning our success directly with your financial progress.
Replacement devices as a backup (if your device can no longer be repaired, we will supply a pre-coded replacement device)
We operate on a fee-only basis, charging solely for our time and expertise. This model eliminates any commission-based conflicts, aligning our success directly with your financial progress.
Volle Transparenz –
keine versteckten Kosten:
Was beinhaltet
die Prüfung?
We will check your control unit for the causes of faults. The diagnostic fee will be deducted in full from the cost of any repairs.
What is hardware repair?
Repair of faulty speed sensors, pressure sensors, solenoid valves and faults on the circuit board.
Data transfer / cloning
If the control unit is beyond repair (e.g. due to a major oil leak), we will transfer your original vehicle and immobiliser data exactly as it is to a replacement unit.
What happens if it is irreparable?
We are offering you a fully reconditioned replacement unit that we have pre-programmed. You won’t need to have it programmed – simply fit it and you’re ready to go.
Typical symptoms and error codes
Does your automatic gearbox shift jerkily, cause the engine to stall, or switch straight to emergency mode? Often, the problem lies not with the mechanical gearbox itself, but with the control unit (TCU). Here are the most common faults that we fix every day at our diagnostic centre in Kerpen:
- P0717 / 0722: The speed signal from component Y3/9b5 (CVT output speed sensor) is not available
- P2722 / P2731: Unauthorised engagement of the hydraulic brake/clutch when the gear selector is moved to the „N“ position“
- P0720: Output speed sensor malfunction
- P0793: Intermediate shaft speed sensor circuit – No signal
- Symptoms: Severe gear-change jolts, jerky gear changes, the engine stalling when setting off, fluctuations in revs, inability to move forward.
- P073E00: Reversing gear signal fault
- P07B700: Pressure sensor, signal implausible
- P07EF00 / P07E400: Park position cannot be engaged
- P07B571: Solenoid valve for parking lock
- P1735: Clutch position sensor 1 – electrical fault
- P1736: Clutch position sensor 2 – electrical fault
Was passiert, wenn Sie ignore the defect?
Risk of mechanical damage to the gearbox
A faulty control unit sends the wrong signals to the clutches and valves. This leads to enormous mechanical wear and tear in the gearbox. What starts out as a relatively inexpensive electronic repair can quickly turn into major gearbox damage (cost: €4,000 and upwards).
Sudden breakdown
Errors such as P07E400 (parking gear cannot be engaged) or a failure of the speed sensors can cause the vehicle to come to a standstill in the middle of a junction or on the motorway.
Expensive new purchase directly from the manufacturer
An authorised workshop does not repair circuit boards. They will always sell you a completely new gearbox control unit – including expensive removal and fitting costs, as well as software programming.
Wertverlust des Fahrzeugs
A gearbox control unit that has not been repaired will have a negative impact on your vehicle’s resale value. Keeping it in good condition is crucial for maintaining its value.
Die Folgen, wenn
Sie Ihr Gerät nicht reparieren lassen:
Do not ignore gear-changing problems or error messages. A faulty gearbox control unit leads to extreme mechanical wear, sudden breakdowns and, in the worst case, catastrophic gearbox damage. What can still be repaired today as an electronic fault could cost you thousands of euros for a new gearbox tomorrow. Avoid unnecessary risks – start your repair order now.
This is how the repair works your control unit
Diagnosis & Removal
Have the fault memory read out at your garage. Print out the fault report and have the gearbox control unit removed by a qualified mechanic.
Order & Shipping
Please fill in our online form. Important: Please print out the order confirmation or email and enclose it with the parcel, along with the error log. Pack the device securely (make sure to degrease it thoroughly beforehand) and send it to us.
Inspection & Repair
Once we have received the item, we will carry out a diagnostic check (subject to a charge). Once you have given your approval, we will start the repair (standard turnaround time: 2–4 working days). For standard faults, an express repair (48 hours) is also available for an additional charge.
Payment & Returns
Once the repair has been successfully completed and payment received, we will return the device to you securely packaged (postage: €14.90 incl. VAT)
Installation
Simply fit it, top up the gearbox oil and off you go. 100% Plug & Play – no need for expensive recoding!
Select repair
Häufig gestellte Fragen
Auf dieser Seite finden Sie Antworten zu den häufig gestellten Fragen
zu der Reparatur von Steuergeräten.
Welche Liefermöglichkeiten bietet Revonik?
We operate on a fee-only basis, charging solely for our time and expertise. This model eliminates any commission-based conflicts, aligning our success directly with your financial progress.
Kann ich einen Paketzusteller für den Versand auswählen?
As fiduciaries, we are legally obligated to prioritize your financial well-being above all else. This means every recommendation we make is based on what’s best for you, not for us. Our fiduciary duty ensures you receive advice that is unbiased.
Wann erhalte ich Infos zu meinem Bauteil?
Every advisor at United Financial Planning Group proudly holds the prestigious CERTIFIED FINANCIAL PLANNER™, ensuring that every recommendation is made solely in your best interest. We are committed to transparency and integrity — never selling products or earning commissions, but focusing entirely on delivering unbiased financial guidance tailored to your goals.
Kann ich das Bauteil selbst ausbauen?
Every advisor at United Financial Planning Group proudly holds the prestigious CERTIFIED FINANCIAL PLANNER™, ensuring that every recommendation is made solely in your best interest. We are committed to transparency and integrity — never selling products or earning commissions, but focusing entirely on delivering unbiased financial guidance tailored to your goals.
