This guide helps distributors assemble a useful return file before asking for an assessment. It is a purchasing and evidence workflow, not a vehicle diagnosis or an instruction to carry out brake repairs. It supplies no MAKEXCAR warranty promise, universal test limit or conclusion about a particular returned disc.
Open the case with part and vehicle identity
Give the case a reference and record the purchase order, supplied part number, delivery date and any available package or batch identification. Connect those records to the actual unit being returned. If a pair was supplied, identify which disc belongs to each recorded installation position rather than treating the pair as an unnamed sample.
Record the vehicle details, axle, relevant brake equipment identification and the application evidence used when the part was selected. A vehicle model by itself may leave catalogue conditions unresolved. If the installed reference differs from the ordered reference, preserve both identities and investigate the difference rather than silently correcting the file.
Keep a photograph of readable markings with a text transcription. Mark an unreadable number as uncertain. A photograph of a generic product or an unopened carton from another order does not identify the returned disc. The reviewer needs a traceable connection between the commercial record and the inspected object.
Describe the vibration before naming its cause
Retain the customer's own words and add a structured symptom record: when it was first noticed, where it was felt, whether it occurred during braking, and the operating conditions actually reported. Separate observed details from a workshop's interpretation. A note reading “warped disc” should not replace the underlying account of what happened.
Ferodo's brake judder guidance describes vibration felt through the steering wheel or suspension during braking under particular conditions and discusses several areas for investigation. Its examples explain why a symptom needs context; they do not diagnose a MAKEXCAR return or establish the cause from a customer's description.
Do not ask a customer to recreate a symptom through an improvised road test for the purpose of completing a claim. Use available reports and any assessment carried out through the appropriate professional process. If a condition was not recorded, leave it unknown rather than supplying a plausible speed, temperature or braking history.
Build a dated installation and symptom timeline
Record the installation date, mileage or other usage record if available, the first complaint date and the date of each inspection. Include relevant service events between installation and the complaint. A timeline makes it possible to distinguish an immediate issue from a later change without assuming either one explains the cause.
Request the original workshop invoice or job record, the disc and pad references used, and any related component work documented at the time. Keep actual installation observations separate from statements about normal workshop practice. “The hub is always cleaned” is not the same as a dated record for this installation.
If the disc was removed, cleaned, machined or refitted before the return request, record that event and the available before-and-after evidence. A later inspection describes the later condition. It cannot reconstruct an earlier surface or mounting state that was never photographed or measured.
Request installation and hub records without assigning blame
Brembo's guidance on noises and vibrations includes attention to the mounting interface and checking the mounted disc. For the return file, ask what relevant installation and inspection records exist for the actual vehicle. General advice does not prove that a particular installer followed or failed to follow a procedure.
HELLA's runout guidance also identifies the hub and bearing as possible additional areas to consider when deviations are found. Keep any hub or bearing inspection under its own heading, with method and findings. An absent record should not become an assumption that another component is defective.
Ask for the applicable service-information source used by the workshop and the records of relevant retention or tightening work where available. This guide does not set a torque or prescribe a repair method. The evidence request should help the reviewer understand the installation context without pre-judging the installer or the supplier.
Keep measurement quantities and limits separate
Request the original inspection report rather than a cropped photograph of a single result. Each measurement should identify the part, quantity, units, instrument, method, positions and condition or mounting setup. Ask for the applicable requirement and its source. A result marked “failed” without these details is difficult to interpret.
Keep lateral runout, disc thickness variation, nominal thickness and minimum thickness in separate fields. Runout and thickness differences describe different measurement questions. If the workshop checked the hub separately, retain that result under its own label. Do not combine several observations into an undefined number called “disc error.”
Where raw readings or calculation records are available, preserve them with the report. A technical reviewer can then examine what the summary actually represents. Do not create missing readings, import a limit from another vehicle or treat a general factory certificate as a measurement of the returned unit.
Photograph and preserve the returned unit
Photograph the unit's identification and external condition before any agreed return assessment changes it. Keep full views and relevant close-ups tied to the same case, date and part identity. Explain which surface is shown. A collection of unlabeled photographs makes it difficult to connect observations to the supplied reference.
Visible marks or discoloration should be described as observations unless an applicable assessment establishes their meaning. A photograph can document appearance; it does not supply a thickness measurement, a temperature history or a manufacturing cause. Keep the image caption narrow enough to match what is actually visible.
Agree the return handling and assessment scope with the responsible party. Record any cleaning, machining or destructive examination that is authorized and preserve the pre-assessment condition record. Packaging should maintain part identity through transport. This article does not authorize modifying a brake component or returning it to service.
Use a case index to identify missing evidence
The following index is a proposed distributor workflow, not a warranty policy. Mark each record as available, requested or unavailable, and identify its source. Keep the original files attached. A short index should make the evidence easier to find without replacing the detailed technical report.
| Record | Evidence to attach | Question answered |
|---|---|---|
| Supplied identity | Order, reference, markings and package record | Which unit is under review? |
| Application | Vehicle, axle and brake equipment information | What installation was intended? |
| Symptom | Original description and recorded conditions | What was actually observed? |
| Timeline | Installation, use and inspection dates | When did each event occur? |
| Installation context | Job record and relevant hub observations | What context is documented? |
| Measurements | Original reports, methods and requirements | Which conditions were measured? |
| Return condition | Dated images and handling record | What changed before assessment? |
If the file lacks an installation record, state that directly and ask what alternative evidence can be obtained. If the part identity is uncertain, resolve it before applying a technical finding to an order. A missing field is a request for information, not automatic proof for or against the claim.
Separate technical assessment from the commercial decision
The technical assessment should state the object inspected, methods used, findings and limitations. A measured condition may support one conclusion while leaving the cause unresolved. Ask the assessor to distinguish those conclusions instead of attaching a broad fault label to an incomplete file.
The commercial decision should refer to the agreed terms and the technical assessment. Record who made it, when it was made and which case evidence was considered. A sourcing blog cannot create a refund entitlement, a replacement promise or a MAKEXCAR warranty period. Those matters require the actual agreement.
When additional information changes the assessment, preserve the earlier version and explain the new evidence. This makes the decision history understandable to the distributor, customer and supplier. Avoid rewriting the original complaint to agree with the final conclusion.
Resolve three incomplete return files
These hypothetical files illustrate different evidence gaps. They do not diagnose a vehicle or settle a commercial claim.
The measurement attachment cannot be tied to the returned unit
The order identifies two discs, but the attached report gives only a vehicle name and one result. Ask the assessor to identify which unit and position were measured and how the report relates to the returned marking. Preserve the report as received instead of adding an assumed identity. If the assessor cannot establish that connection, the result remains unlinked evidence; it should not be applied to both order items. The appropriate next step is an identity clarification, not a conclusion that both discs failed.
The chronology shows a gap between installation and first complaint
Assume invented dates of installation on 1 September and first recorded complaint on 15 September. The elapsed interval is 14 calendar days, but it is not mileage, operating time or proof of when the physical condition began. A workshop assessment dated 20 September describes the later inspected condition. Request the actual usage and intervening service records if relevant, and preserve the three dates separately. This example demonstrates evidence chronology; it supplies no warranty deadline, expected failure time or causal inference.
A report says failed without naming the criterion
Obtain the measured quantity, units, mounting state, method and applicable source before interpreting the verdict. If the assessor supplies the criterion, the technical reviewer can evaluate whether it applies to that vehicle and object. If the report concerns a changed or machined unit, retain that condition rather than treating it as an untouched return. A missing hub record may require further assessment, but it does not by itself accept or reject the claim. Record the remaining technical uncertainty separately from any decision under the agreed commercial terms.
Send MAKEXCAR a case-specific evidence file
Use the following cover sheet to make the return file readable. Attach the original records rather than replacing them with a summary, and keep unknown inputs explicitly unresolved.
Case and supplied unit: [case ID; order/reference; markings; returned position; package/batch record; photo filenames]
Application and complaint: [vehicle/axle/brake equipment; original customer description; reported operating conditions; source/date]
Chronology: [installation, first complaint and inspection dates; recorded usage; intervening service; changes before assessment]
Technical attachments: [report IDs; measured quantities and units; specimen/method/criterion source; installation and hub records; missing evidence]
Assessment requested: [identity or method clarification; technical question; original-condition handling agreement; applicable commercial terms reference]
Use the MAKEXCAR contact route and identify the supplied item within the Brake Discs product family. A useful response states which evidence supports the findings and what remains unresolved. Keep a technical finding tied to the assessed object and method; record the separate commercial decision against the actual agreed terms rather than treating this checklist as a warranty policy.
