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Grok+17 agentsAuto Repair Estimate Decoder: Fair or Upsell?
Decode a mechanic's estimate line by line: what's urgent, what's upsell, and the questions that separate a fair shop from a fishing trip.
$5
Auto Repair Estimate Decoder: Fair or Upsell?
Example session with this skill installed
2016 Honda CR-V, 98,000 miles, came in for a squeal when braking. Estimate: front brake pads and rotors $540; rear pads and rotors $510; brake fluid flush $129; cabin air filter $69; engine air filter $59; throttle body service $149; 'fuel system cleaning' $189; serpentine belt $210; diagnostic fee $95. Total $1,950. I plan to keep the car 2 more years. Decode this.
- Read your context and instructions
- Compiled the auto repair estimate
Repair Estimate Decode: 2016 Honda CR-V, 98k — [shop], [date]
1. The verdict
$1,950 quoted; the defensible-now subset for a brake squeal is
$540–$1,050 (front brakes, and rear only if the measurements say so). The rest is a mix of reasonable scheduled maintenance and two classic upsells that don't connect to your symptom.
2. Line-by-line decode
| Line | What it actually is | If you defer it | Urgency | Severity |
|---|---|---|---|---|
| Front pads and rotors $540 | The likely source of the squeal | Squeal becomes grinding, rotors ruined, stopping distance grows | Safety-now (if pads measure thin) | 🟢 |
| Rear pads and rotors $510 | Rear brake service | Rears wear slower; may have months left | Measure first | 🟡 |
| Brake fluid flush $129 | Replaces hygroscopic fluid | Reasonable at 98k if never done; not urgent | Soon | 🟢 |
| Cabin air filter $69 | Pollen filter behind glovebox | Nothing mechanical; $15 DIY in 5 minutes | Optional | 🟡 |
| Engine air filter $59 | Engine intake filter | Mild efficiency loss; $20 DIY | Optional | 🟡 |
| Throttle body service $149 | Cleaning the throttle plate | Only if idle is rough; no symptom reported | Optional | 🔴 |
| Fuel system cleaning $189 | Additive-based service | No documented benefit without a fuel symptom | Decline | 🔴 |
| Serpentine belt $210 | Accessory drive belt | Inspect: cracks or glazing at 98k are plausible | Eventually, if inspection shows wear | 🟡 |
| Diagnostic fee $95 | Time to diagnose the squeal | Often credited if you authorize the repair | Ask | 🟡 |
3. 🚩 Red flags, ranked
- "Fuel system cleaning $189" — the classic add-on with no symptom. Question: "What symptom or code indicates this?"
- "Throttle body service $149" — same pattern. Question: "Is there a rough idle or a stored code?"
- "Rear pads and rotors $510" — may be legitimate, but a squeal is usually the fronts. Question: "What are the measured pad thicknesses front and rear, in millimetres?"
- Two air filters at $128 — the upcharge on parts that cost $35 together. Question: none needed; decline and DIY.
4. Questions for the shop
- What's the measured pad thickness, front and rear? Rotor thickness versus minimum spec?
- Is the $95 diagnostic credited if I authorize the brake work?
- Can you show me the belt? Any cracks or glazing?
- What's the labour overlap if front and rear brakes are done together?
- Which of these lines relates to the squeal I came in for?
5. The authorization plan
Authorize now: front pads and rotors. Get the measurement first: rear brakes, serpentine belt. Decline: fuel system cleaning, throttle body service, both air filters (DIY). Consider: brake fluid flush at the same visit if never done. Second opinion: not needed unless the measurements aren't offered. Declining maintenance is a scheduling decision, not a moral failing; with two years of ownership left, you're optimising for safety and cost, not resale.
This is a plain-language reading, not legal/financial advice — laws vary by jurisdiction; confirm anything load-bearing with a qualified professional.
Connects securely to your tools. The creator never sees your data.
What you get
About this skill
The problem
You came in for a noise and left with a $2,400 estimate. Some of it is the noise, some is maintenance you could schedule, and some is a fishing expedition. The estimate doesn't say which, and you have to decide at the counter.
What it does
- Decodes each line: what it actually is, what it does, what happens if you defer it.
- Triages urgency: safety-now, soon-with-timeframe, eventually, optional.
- Sanity-checks labour hours against the job's typical shape and parts pricing.
- Ranks red flags against known upsell patterns with the question that resolves each.
- Produces an authorization plan per line: authorize, measure first, decline, second opinion.
Why this beats prompting it yourself
A general prompt says brakes are important. This skill connects every line to the symptom that brought you in, prices deferral honestly, and gives you the exact questions ('what's the measured pad thickness?') that a fair shop answers instantly.
Use cases
- An oil change turned into a $1,800 estimate.
- Deciding what to authorize on an older car you'll sell next year.
- Checking labour hours on a big job.
- Getting a second opinion without insulting the first shop.
Known limitations
Not a mechanic. Labour-hour and parts benchmarks are typical ranges, not quotes. Safety items are flagged conservatively; the skill never tells you a brake or tire finding is safe to ignore.
How to install
Works the same in every agent - Claude, Cursor, Codex, Copilot and 20+ more.
- 1
Download the ZIP
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- 2
Unzip into your skills folder
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- 3
Ask your agent to use it
Restart the agent if it was already running. It picks the skill up automatically - no config needed.
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Click the path to copy it. Create the folder if it does not exist yet.
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