▸ RETAIL SERVICE
Second-opinion diagnostics
before you authorize the work.
Bring the paperwork from the dealer or another shop to Spot-On in San Antonio. We perform second-opinion diagnostics at our shop, by appointment only at 4715 N Stahl Park, Suite 105. Dealers frequently quote module replacement when the actual fix is programming, a security access procedure, or a bench-level repair that costs a fraction. We verify what is actually wrong before you authorize expensive work.
▸ WHAT WE COMMONLY FIND
The pattern is consistent.
After 15+ years of doing this, certain misdiagnoses come up over and over. None of it is the dealer doing anything wrong on purpose — it’s scope. Dealers turn volume; diagnostic depth lives somewhere else.
- Module replacement quoted for a software issueMany "failed module" diagnoses are actually a programming gap or a security access state — the module is fine.
- Transmission replacement quoted for a TCM cloneMost modern transmission "failures" are control module issues. A TCM clone often resolves the symptom at a fraction of replacement cost.
- Engine replacement quoted for a wiring or sensor issueA driveability complaint that traced to a single connector or ground point.
- Parts-cannon work that didn’t solve the problemYou’ve already paid for two or three "this might be it" replacements and the symptom is still there.
▸ WHAT TO BRING
The more we know up front, the faster we work.
- Every estimate and invoiceFrom the dealer, prior shops, parts receipts.
- Prior diagnostic reportsAnything that shows fault codes, scan results, technician notes.
- Symptom descriptionWhen it happens, what changes, recent work.
- Your vehicle and all keys/fobsDo not clear codes before bringing it in. Leave the warning light on.
▸ WHAT TO EXPECT
A written second opinion you can act on.
- Confirmation or contradictionWe verify the existing diagnosis with our own tooling. If they’re right, we tell you. If they’re wrong, we tell you what is actually wrong.
- Written repair planWith itemized costs so you can prioritize critical work first.
- No obligationDecline our repair work and you owe only the diagnostic fee — you can take the report anywhere.
▸ READY TO BOOK
Book an in-shop appointment.
Tell us what the vehicle is doing and we’ll have the right tools ready before you arrive.