How a repair order works at Compramas

In short: For a repair order, you order the matching repair in the shop, have the control unit removed and send it to Compramas with the order documents and an exact fault description. We test and repair the unit and send your own original part back – with a 12-month warranty.

With a repair order at Compramas you can have your faulty vehicle control unit professionally tested and repaired. Instead of buying an expensive new part, you send us your existing component. After the repair you receive the same unit back and can have it refitted in your vehicle.

Depending on the offer, our repair service includes the repair of ABS control units, engine control units, transmission control units, hydraulic units, parking heaters and other electronic vehicle components.

What is a repair order?

With a repair order you do not purchase a new control unit. You commission us to test and repair your own faulty unit.

The advantage is that the existing vehicle control unit can be reused in many cases. Depending on the unit and the scope of the repair, vehicle-specific data, coding and programming are often retained. Whether coding or adaptation is still required after refitting depends on the respective component and vehicle.

How a control unit repair works

1. Choose the right repair service

In our online shop, choose the repair that matches your vehicle, control unit and fault symptom.

Pay particular attention to:

• vehicle manufacturer and vehicle model
• model year and vehicle version
• part number of the control unit
• manufacturer of the component
• stored fault codes
• existing fault symptoms

Typical search terms might be, for example, ABS control unit repair, engine control unit repair, transmission control unit repair, ABS hydraulic unit repair or parking heater repair.

If you are not sure which repair offer is suitable for your unit, please contact us before ordering.

2. Order the repair online

Add the matching repair service to your cart and complete the order. After ordering you receive the corresponding order information.

Please note that for a repair you must send us your own removed unit. Processing can only begin once the component has arrived.

3. Have the control unit removed professionally

The faulty control unit or component should be removed by a qualified specialist workshop. Before removal it is important to check the vehicle and the surrounding components.

A faulty control unit may also have been damaged by causes such as:

• short circuit or overvoltage
• faulty power supply
• damaged cables or connectors
• moisture or water ingress
• faulty sensors or actuators
• mechanical damage
• faults in other vehicle components

The actual cause of the fault in the vehicle should be fixed before refitting so that the repaired unit is not damaged again.

4. Print out and enclose the order documents

The order documents must be enclosed in the parcel. This is the only way we can clearly assign the component sent in to your repair order.

Please enclose at least the following information in the parcel:

• order number
• name and contact details
• vehicle data
• part number of the unit
• exact fault description
• existing fault codes

A fault description that is as precise as possible makes it easier to test and repair the vehicle control unit. So don't just write “unit faulty”, but describe when and how the fault occurs.

5. Pack the unit securely and send it in

Pack the removed control unit carefully and with sufficient padding. The component must not move inside the parcel during transport.

Particularly sensitive areas such as connectors, terminals, plastic housings, valves and electronic components must be protected against impacts, moisture and dirt.

If possible, use a sturdy shipping box and sufficient padding material. Place the order documents clearly visible in the parcel.

Then send the unit to the Compramas delivery address stated in the order documents.

Testing of the control unit sent in

After receipt, your parcel is registered and assigned to the corresponding repair order. Our technicians then test the component sent in and the fault symptom you described.

Depending on the unit, different tests may be required. These include, for example, a visual inspection, electronic measurements, function tests and unit-specific tests.

This checks whether the stated defect is present and whether the control unit or hydraulic unit can be repaired.

Repair of the faulty component

If the fault described is confirmed and the unit is repairable, we carry out the agreed repair.

The exact scope of the repair depends on the unit and fault symptom. Only the defect or repair area described in the offer is repaired. Further faults may require additional testing or consultation.

After the repair the component is tested again. This is to ensure that the fault worked on has been successfully fixed.

Return shipping of the repaired unit

Once the control unit repair is complete, we send your own unit back to you. You therefore do not receive someone else's exchange unit, but the component you sent in, now repaired.

After receipt, the unit should be fitted by a qualified specialist workshop. Depending on the control unit and vehicle, basic setting, bleeding, coding, programming or teach-in may be required after installation.

Always observe the notes in the respective product description.

What happens if the unit cannot be repaired?

Not every faulty vehicle control unit can be repaired. A repair may be impossible or more difficult if the unit, for example:

• is severely mechanically damaged
• shows fire or water damage
• was sent in incomplete
• has already been improperly opened
• shows signs of previous repair attempts
• does not match the repair offer ordered
• has a fault other than the one described

In such a case we will contact you in accordance with the respective order and product conditions.

Repair or exchange unit – which makes more sense?

With a repair you send your own control unit to Compramas. It is tested, repaired and then sent back to you.

With an exchange unit, on the other hand, you first receive an already prepared replacement unit. You then send your faulty old unit back to us.

A repair makes particular sense if you want to keep your original unit or no suitable exchange unit is available. An exchange, on the other hand, can reduce downtime if a suitable unit can be delivered immediately.

Frequently asked questions about repair orders

Do I have to send in my own control unit?

Yes. For a repair order we need the actual faulty component from your vehicle.

Which documents must go in the parcel?

Please enclose the complete order documents or a copy of the order confirmation. We also need a fault description that is as precise as possible and any existing fault codes.

How long does a control unit repair take?

The processing time depends on the unit, fault symptom and current order volume. You can find the expected processing time in the respective product description or receive it on request.

Are coding and vehicle data retained?

That depends on the control unit and the scope of the repair. With many repairs the original unit is retained. Coding, programming or teach-in may nevertheless be required.

Can I remove the unit myself?

Removal and later installation should be carried out by a qualified specialist workshop. Mistakes during removal, installation or in the vehicle's electrics can cause additional damage to the component.

Have your vehicle control unit repaired at Compramas

Compramas has been active in automotive electronics since 2007 and offers repairs for numerous electronic vehicle components. Professional repair can avoid an expensive replacement of the complete component in many cases.

If you have questions about your repair order, the right repair service or shipping your control unit, you can reach us by phone at:

05671 / 7664710