The Car That Isn't Roadworthy
A parent brings a 2013 sedan for a two-hour lesson. Your walkaround finds: left front tire at 26 psi (door placard says 35 psi), right rear tread at 3/32 inch, no spare in the well, brake fluid at the MIN line, the driver's wiper blade torn, and a 9-inch crack across the lower driver's side of the windshield inside the wiper sweep. One license-plate lamp is out. The parent mentions that last week the brake pedal "sank a little" while held at a long light but "came back." The student has a permit and 12 hours. The parent has prepaid for eight lessons and says, "It just passed emissions - it's fine." You have a dual-brake training vehicle available in 40 minutes.
1. Sort these findings into stop / fix today / teach-and-continue, with the reasoning for each.
Read the worked answer
STOP - do not drive this car.
- Pedal sinking while held. A pedal that sinks under steady pressure is losing hydraulic pressure: master cylinder, wheel cylinder, caliper, or a line. This is a loss-of-pressure failure, not a wear item. Critically, an instructor brake is plumbed into the same hydraulic circuit - if the circuit fails, your dual control fails with it. Your backup system is not a backup for this defect.
FIX TODAY before any highway or rain driving.
- 26 psi vs 35 psi placard - about 26% underinflated. More sidewall flex, more heat, slower steering response, longer stopping distance. Not a legal violation; a real handling and heat problem.
- 3/32 inch tread - above the 2/32 legal minimum but into the range where wet traction and hydroplaning resistance fall off sharply.
- Crack in the wiper sweep on the driver's side, plus a torn blade - glare, streaking, and a compromised sight line at exactly the wrong moment. Many jurisdictions treat a crack in the driver's swept view as an equipment violation; regardless, it is an instructional hazard.
- Brake fluid at MIN - either a leak (see above) or neglect. Diagnose, don't top off and forget.
TEACH-AND-CONTINUE.
- No spare - not a bar to driving, but a real risk on rural Nevada roads. Note it, discuss it.
- Plate lamp out - minor, fixable, useful as a "how do you check your own lights" lesson.
2. How do you handle the parent, and what do you document?
Read the worked answer
Be specific, be brief, be non-accusatory - and put wheels under the lesson.
- Show, don't argue. Point at the fluid line, put a gauge on the tire, press the brake pedal together and let the parent watch it sink. "Emissions" tests the exhaust, not the brakes.
- State the policy, not a personal judgment. "Our insurer and our school require the training vehicle to be roadworthy. A pedal that sinks means I can't trust my own instructor brake."
- Offer the immediate alternative. Use the school's dual-brake car for today's lesson with the parent's written consent, and hand them a one-page list of what to have fixed before the car returns.
- Document: date and time, each defect found with the measurement, what you told the parent, what they chose, and a photo of the pedal/fluid/tread. If you later learn the car was driven and something happened, that record is the difference between a professional judgment and negligence.
The line you never cross: never teach in a car you know has a brake defect because the lesson is prepaid, the parent is annoyed, or the student needs the hours.
3. What pre-trip routine do you teach this student so it transfers to a car she owns?
Read the worked answer
Train a 60-second student-led walkaround, narrated out loud, with you only confirming.
- Tires: pressures checked cold against the placard (not the tire sidewall), tread judged with a coin or the wear bars, and a look for bulges and sidewall damage.
- Lights: all four corners, plus brake lights checked by reflection in a window or with a helper.
- Glass and wipers: any crack in the swept area, washer fluid, blade condition.
- Fluids: brake, coolant, oil, washer - know where the MIN lines are and what it means if one moves.
- Brakes and steering feel: pedal firm and high, no pull, no noise, no vibration. "Different from yesterday" is a reason to stop and ask.
Why this order: she will not own a placard-matched car forever. The transferable skill is not the checklist - it is the habit of checking something out loud before trusting it, and knowing that 'it feels wrong' is a complete sentence that justifies stopping.