Multi-Point Inspection

Done right, it catches failures before they strand or injure someone, and it gives the customer an honest picture with clear priorities. Done wrong — either sloppy or padded — it either misses a ball joint about to let go or reads like an upsell sheet. Learn to see accurately and report honestly.

The Tiered Report: How Professionals Communicate Findings

The professional standard for reporting inspection findings is a tiered system organized by urgency: Immediate Safety Issue, Recommended Now, and Watch for Next Service. Immediate Safety items require action before the vehicle should be driven. Recommended Now items should be addressed within days or weeks. Watch items are documented and monitored at future visits. This structure communicates severity clearly, keeps the customer in control of decisions, and kills the perception that the shop is just building an invoice.

Documentation is part of the standard, not an extra. A comprehensive inspection produces a written report with photos of significant findings, severity ratings, and rough repair cost estimates — and the customer gets that report whether or not they approve any repairs. Written, photographic documentation builds trust, gives the customer a reference they can act on later, and protects the shop legally if a dispute ever arises.

And when you inspect a well-maintained vehicle and find nothing wrong, say so. Report that the vehicle is in excellent condition, list what was inspected, and thank the customer for taking care of it. Manufacturing findings to pad a ticket destroys trust permanently the moment a customer suspects the pattern — and an honest 'everything looks good' brings that customer back for years.

Brakes: Pads, Rotors, and the Parking Brake

Brake pads start life at roughly 10 to 12mm of friction material, and the wear threshold is around 2 to 3mm. So a set measuring 4mm front and 5mm rear is used but not dangerous — the right call is a brake service recommendation within the next few thousand miles or 3 to 6 months, with a re-check at the next visit. Not an emergency, not ignorable. Learning to place findings on that spectrum is the core inspection skill.

Rotors are a different calculation. Deep grooves and heat spots (bluish discolored patches) mean replacement, not resurfacing. Deep grooves consume material below serviceable thickness, and heat spots are areas of crystallized, hardened metal that resurfacing can't remove — they'll keep causing pulsation and eventually crack. Modern rotors are also manufactured thinner than they used to be, so turning them frequently drops them below minimum thickness anyway. When in doubt, replace.

Don't skip the parking brake. A non-functional parking brake is an Immediate Safety finding, not a convenience item — it's the redundant hold that prevents a rollaway if the transmission's park pawl fails, and it's required equipment for state safety inspections. Recommend immediate service.

Tires, Alignment, and Wheel Bearings

Know your tread depth numbers cold. The legal minimum is 2/32 inch, but wet-braking performance degrades drastically below 4/32 inch — that's the real safety threshold. A tire at 3/32 is between the two, which means recommend replacement now, before the wet season or winter, not 'wait until it's legal-minimum bald.' Customers deserve the wet-performance explanation, because 'it's still legal' and 'it's still safe' are not the same statement.

Read the wear pattern before you quote tires. Feathered or scalloped wear concentrated on the inside edge indicates an alignment problem — typically excessive toe-out. If you replace the tires without correcting the alignment, the new set wears out the exact same way, and the customer blames the tires or the shop. Always inspect alignment and quote it alongside any tire recommendation when the wear pattern points to it.

Wheel bearings escalate faster than people expect. Slight play felt at the left front today is near-term failure, and a wheel bearing that fails at highway speed can seize the wheel or, in the worst case, allow separation. Slight play earns a 'replace soon' recommendation measured in weeks, not months. On modern sealed hub bearings there is no adjustment to perform — worn means replace.

Suspension, Driveline, and Engine Mounts

A lower ball joint with visible play is one of the highest-priority safety findings you can make. Ball joints tie the suspension together, and complete failure — which follows visible play — drops the wheel angle catastrophically and can cause total loss of vehicle control. That's an Immediate Safety classification and an immediate replacement recommendation.

A torn CV boot slinging grease is a Recommended Now item. Once the boot tears, grease escapes and road grit enters the joint. The joint may keep running for months, but it's deteriorating the entire time, and replacing a boot (or an axle, if the joint is already contaminated) now is far cheaper than the full CV joint and axle replacement it becomes if ignored.

Shocks and struts get replaced in axle pairs — both fronts or both rears — even when only one has failed. A unit that's gone soft, allows excessive body movement, and shows oil leaking around the housing is done; but pairing a fresh damper with a worn one on the same axle creates uneven ride and handling. Pair replacement is the industry standard, and it's a legitimate recommendation, not an upsell.

Check differential fluid while you're under the car. A fine glitter of metallic particles is normal gear wear, but larger metallic particles or chunks suspended in dark fluid indicate excessive wear on internal gears or bearings. Servicing the fluid alone won't fix that — recommend a full differential inspection before continued use.

Motor mounts round out the underhood-and-underneath check. A torn mount — visible rubber failure — is Recommended service: not an immediate safety issue, but a real one. The engine shifting under acceleration strains and can damage attached hoses, wiring harnesses, and drivetrain components, and it produces the vibration the customer has probably already noticed. Left alone, it causes cascading failures.

Ignition, Intake, Exhaust, Lighting, and Cabin Air

Spark plug electrodes start out sharp-edged, and wear rounds them off. A rounded electrode means a widened gap and a higher voltage requirement to fire — and eventually the ignition system can't reliably jump that gap under load, producing misfires. Worn plugs are a wear item, not a coil problem; replace them at the manufacturer's interval, which runs 60,000 to 100,000 miles on iridium and platinum plugs.

A cracked engine air intake tube matters more than its size suggests. The tube sits downstream of the MAF sensor, so any air entering through a crack is unmetered — the ECU never sees it and can't add fuel to compensate. The result is a lean condition, MAF-related driveability complaints, potential misfires, and classically the P0171/P0174 lean codes. When you're chasing lean codes, cracked intake plumbing is one of the first suspects.

Exhaust systems teach the opposite lesson: restraint. Surface rust throughout an older exhaust with no holes is normal — classify it as Watch and recommend replacement only when actual leaks or structural problems appear. Recommending exhaust replacement over cosmetic rust reads as predatory and erodes trust.

When one headlight bulb is out, note both. Headlight bulbs age together, so the surviving bulb is close behind. Recommending pair replacement isn't upselling — it saves the customer a return trip and a possible state inspection failure.

Finally, treat a heavily contaminated cabin air filter as a health finding, not a cosmetic one. A filter packed with leaves, debris, and mold blows contaminated air into the cabin every time the HVAC runs, which can trigger allergic reactions, aggravate asthma, and expose occupants to airborne mold chronically. Replace it as a priority.

One more judgment call that comes up on high-mileage vehicles: the leaking rear main seal. The repair requires transmission removal on most vehicles, which makes it major labor. If the leak is minor — marking the driveway but not affecting the oil level — monitoring can genuinely be the more cost-effective path. If it's losing enough oil to move the dipstick, address it. Either way, lay out the tradeoffs honestly and let the customer decide with full information.