Postal module repair or workshop diagnosis?

Some repair enquiries involve a removed control module. Others need the complete vehicle so the fault can be investigated in context. Knowing the difference helps you avoid sending the wrong item or arranging an unnecessary journey.

When to discuss a postal assessment

A postal enquiry is useful when your garage has identified a particular module and can supply its part number, symptoms and diagnostic findings. Send that information first. The repair team can then discuss suitability and confirm what should be sent.

If cloning is requested, identify the original and proposed donor separately. Do not buy a replacement or post additional assemblies until the requirements have been agreed. Follow the postal module guide for the packaging and information checklist.

When the vehicle may be needed

If the cause is still unclear, the complete vehicle may be needed for diagnosis. Describe when the fault occurs, what functions are affected, and what your technician has already checked. Intermittent faults are particularly useful to describe as a sequence of events.

Programming and adaptation requirements also vary by vehicle and module. A bench-prepared unit may still need vehicle-side work, so agree the plan with your installer before refitting.

EV and hybrid enquiries

Start by describing the vehicle, warning messages, charging behaviour and available diagnostic report. Do not send batteries or high-voltage assemblies through the ordinary module postal route. Contact the team to discuss the correct arrangement.

Questions to ask before booking

• Does this job need the vehicle or only the identified module?
• What information is needed to assess suitability?
• Should the original, donor or any other item be supplied?
• What assessment is proposed, and what is included?
• What information will the installer need afterwards?

Choose your next step

If you know the service and need a Didcot visit, review the appointment calendar. If the scope is unclear, use the repair enquiry form first.

Our workshop is in Didcot, Oxfordshire. Suitable postal enquiries can come from across the UK; see service coverage. The listed cities represent postal service areas, not separate branches.

Keep the handover simple

Use a consistent job reference, include your contact details, and keep copies of the scan report and photographs. Let the repair team know about earlier work or changes to the symptoms. Clear information makes the next conversation more useful.