In This Guide
Treat mileage as context rather than approval
A mileage figure alone cannot prove that a car is suitable or unsuitable for calibration. Ask what evidence is needed for the actual vehicle. Maintenance, previous repairs, usage and current symptoms help the team judge the next appropriate step.
A well-recorded history is more useful than describing the car as perfect because no warning is lit. Include how long you have owned it and whether the behaviour has changed. Unknown software or an incomplete service record should be stated plainly.
Describe symptoms before choosing performance work
Share misfire, boost loss, unusual smoke, oil or coolant use, temperature concerns and warning messages. Include fault codes and any diagnostic findings. A new lack of performance might be a repair enquiry rather than an opportunity for tuning.
Clearing codes before the appointment can remove useful context without correcting a problem. Preserve reports where possible and describe the conditions in which the fault occurs. The initial agreed scope may be diagnosis.
Include the clutch and gearbox history
Engine output is only one part of the vehicle. Tell us about clutch slip, flywheel vibration, harsh shifts, delayed selection or transmission warnings. A gearbox tune cannot restore worn components or establish that a drivetrain is healthy.
Add recent servicing and any previous ECU/TCU changes. If your priority is modest, progressive response, say so. That preference can inform the discussion, but it does not eliminate the need to investigate existing faults.
Agree checks and expectations before booking
Ask what identification and checks are included and whether additional investigation is required. Access support, fuel and hardware affect the quote. Do not treat an online model listing as final approval for a particular high-mileage car.
Send registration, mileage, service history, exact transmission, existing software and postcode. This gives the team a useful starting brief and lets the appointment be planned around the condition and the actual work.
Technical reference: Pico Technology: relative compression as a mechanical diagnostic check. Reviewed 7 October 2026. Work and any remaining installation requirements are assessed for the exact application.
Send the information that helps.
- Registration, engine, gearbox and mileage
- Service records and recent repairs
- Current symptoms, scans and test findings
- Previous map and fuel used
- Postcode and the intended result
Questions about this enquiry
Is there a universal mileage cut-off?
Suitability is assessed from the vehicle, history and condition. A website mileage rule cannot replace that assessment.
Will a conservative remap repair an existing fault?
No. Existing engine or drivetrain problems require the appropriate diagnosis and repair.