Coverage Entry
Record the OE cross reference, year, make, model, sales market and frequency in MHz. Ask which programming tool, software coverage and relearn route apply. A shared frequency leaves vehicle communication unconfirmed.
Sourcing Lab / Fitment and evidence
Schrader TPMS Sourcing Lab
Turn a replacement reference into a fitment record, a comparable quote and a sample decision.
What makes a reference comparable?
For example, a buyer replacing a clamp-in TPMS service pack may have a matching sensor reference but an incomplete hardware list. Request the exploded view and confirm the seal, washer, nut, core and cap line by line before comparing prices.
Valve Interface
Compare clamp-in and snap-in only within the applicable rim and sensor specification. Record valve-hole diameter, seat profile, stem clearance and the specified hardware. Request installation instructions for the actual valve assembly.
Drawing Match
For centering rings, record wheel center bore and hub pilot separately. A sample RFQ might read OD 66.6 mm, ID 57.1 mm. Add ring height, chamfer and buyer-approved tolerances before comparing aluminum and polymer options.
Pack Scope
Compare a stocked assortment with a custom mix on unit count, label language, component interchange, setup cost and sample requirements. A larger carton count can lower the cost per part while making a slow-moving size harder to replenish separately.
Check Plan
For a ring sample, agree a conditioned measurement environment and the instrument resolution in advance. Inspect OD and ID at multiple orientations, log the drawing revision and trial-seat the sample on the intended hub and wheel. Record readings against buyer-approved tolerances.
Scope & Trace
Link a supplier report to its issuing party, report date, method, exact sample or SKU and target market. Log carton and lot references. A report for another stem revision or packaging lot needs its own review.
Track a part from cross reference to purchase decision
Capture
Record the buyer reference with the vehicle, dimensions or valve interface and the destination market.
Normalize
Convert each supplier offer to the same unit of sale. Compare kit contents, tooling, labeling and named delivery place.
Check
Ask the buyer to confirm the sample criteria. If using a lab or inspector, attach the agreed method and tie the report to the sampled SKU.
Release
Record approved deviations and lot identifiers before handing the packing checklist to the shipment parties.