Repair Cost Guide · Mobile Diagnostics · Hill Country TX
Every price below is honest independent-shop street pricing, with what moves you inside the range. Then each page answers the question the aggregator sites never do: how this job gets quoted on a guess, and the test that proves you need it before $1,000+ changes hands.
$500–$900 installed
The red battery light is a charging-system light, not an alternator light. Corroded terminals, a loose ground strap, a slipping belt, and a wiring pigtail under a service bulletin all produce the exact same lamp — for $20–$150 — and all survive a $700 alternator swap without changing.
The test that proves it
$300–$700 installed
One click, silence, dash lights blazing — the classic starter symptom. But a corroded battery cable, a dead cell collapsing under load, a neutral safety switch, or a ground strap bolted to a painted bracket produce identical symptoms, and each costs a fraction of a starter. Starters get replaced on vibes more than almost any other part.
The test that proves it
$1,200–$3,000 installed
P0420 does not say “catalytic converter bad.” It says the downstream sensor sees less efficiency than expected — which a lazy O2 sensor, a misfire cooking the cat, an exhaust leak, oil consumption, or a tune can all produce. Buying the cat off the code alone is the single most expensive parts-guess in modern repair.
The test that proves it
$300–$700 per corner
The speed-linked drone everyone calls “my tires are getting loud” is the most commonly mis-sold noise in America. Tire stores hear the hum, point at tread, and sell a set; a bearing hums louder when you load it and lighter on coast — ten minutes of driving tells them apart, and almost nobody runs the test before writing the quote.
The test that proves it
$400–$900 (belt-driven: up to $1,400)
A weep hole dripping pink dye under the belt cover is as close to a self-diagnosing part as engines get. But half of “you need a water pump” quotes are actually a $30 hose, a loose clamp, a radiator cap venting, or a stuck thermostat — all of which leave coolant on the ground and point at the pump.
The test that proves it
$300–$600 per axle (pads + rotors)
Squeal is a countdown, grinding is a deadline, and a $40 caliper-pin hardware kit wearing pads unevenly is the single most common reason an “you need everything” quote is wrong. Brake work is safety work — nobody should shop it on price alone — but the difference between $300 and $1,200 is usually an inspection nobody performed.
The test that proves it
$1,500–$4,500
When the chain job is real, it’s real: a stretched chain, worn guides, or jumped timing means bent valves on an interference engine. But VVT codes P0011/P0016 fire just as happily for low oil pressure, a clogged pickup screen, a $90 solenoid, or a missed oil change — and the engine-top-end quote written off a code alone is the most expensive guess in the shop.
The test that proves it
$500–$1,200
Crank-no-start, surge at highway speed, or a missing prime-hum from the back seat all put the pump in the dock. Fuel-pressure regulator, pump relay, wiring chafe at the tank sender, a clogged filter, and a bent float arm mimic pump death with real frequency — and dropping the tank twice is nobody’s idea of fun.
The test that proves it
$150–$900 depending on what’s actually leaking
EVAP codes (P0442, P0455, P0456) are the most-overpriced fault family in emissions-era repair, because the code says only “system is leaking” — and the leak is a missing gas cap, a $15 filler-neck hose, a cracked o-ring, or a valve stuck open far more often than a $800 charcoal canister.
The test that proves it
$150–$350 for one coil; $500–$700 for a “full set”
A cylinder-specific code (P0301–P0306) names a cylinder, not a part. Swap that cylinder’s coil to another position and the misfire either follows the coil (coil guilty) or stays put (now test the plug, injector, compression, or wiring). That ten-minute swap test is the difference between a $200 repair and a $700 parts-cannon.
The test that proves it
$3,500–$5,500 (rebuild) · $150–$1,200 (the electronic fix)
Slipping, flare, or hard shifts get quoted as “rebuild needed” on faith, and the transmission is too expensive a hostage for faith to cover. Range sensors out of calibration, a $40–$200 solenoid pack, a wiring chafe, air locked in after a filter change, and adaptive-learning drift all reproduce “bad transmission” behavior at a fraction of the price.
The test that proves it
Ranges are national street pricing for independent shops — parts plus labor, before taxes and fees. They're a benchmark, not a quote for your car. And the number that actually decides your bill isn't in any range: it's the share of these repairs that get installed on cars that needed a $15 part or a $40 test instead. That's the line item this whole site exists to protect you from.
Have a written estimate? Scan it for red flags in your browser, or compare it against a diagnosis-first approach in the savings calculator. And before any of it gets approved, check whether the work was ever due in the maintenance interval guide.