FixLoud Exhaust or Exhaust Leak — What It Usually Is
A suddenly loud car, a tick on cold starts, or a drone at speed — exhaust systems fail from the outside in (rust) and the inside out (heat cycles).
What it actually turns out to be
| The fix involved | Share of visits* | Typical cost† | Median |
|---|---|---|---|
| Exhaust Component | 57.2% | $117 – $476 | $232 |
| Muffler | 19.7% | $116 – $310 | $191 |
| Gasket / Seal | 14.7% | $65 – $444 | $188 |
| Pipe / Tube | 13.1% | $26 – $196 | $65 |
| Catalytic Converter | 7.6% | $317 – $975 | $567 |
| Other, rarer causes | smaller shares | varies | — |
*Share of visits whose repair involved this part. Combined repairs count toward each
part involved, so shares overlap and don't add up to 100%. Among visits that ended in a parts repair.
†Middle half of real invoices (25th–75th percentile) when this was the only fix — parts + labor, all vehicle types.
Real repair reports
These are recent, paid visits for this complaint — the words as the owner said them, and what it turned out to be.
Car owners said
“Check exhaust for leaks”
“Check exhaust leak and advise”
“Check for exhaust noise”
“Ck exhaust - loud”
“Muffler is too loud”
“Inspect for exhaust leak”
What the technician found
“Customer states : replace exhaust replaced cat back exhaust as per previous visit on 6/17/2027”
“Found engine codes P0332 Knock Sensor circuit low voltage Bank 2 P0521 Engine Oil pressure Sensor Performance P0523 Engine Oil Pressure Switch Circuit High Diagnosed bad oil pressure sensor switch Code P0332 did not return after clearing codes”
“Replaced both exhaust manifold gaskets and repaired broken bolts”
Suddenly loud
A dramatic overnight change usually means a rusted joint, a dropped muffler, or a split pipe — visible on a lift in minutes and often a modest weld or section repair.
Ticking on cold starts
A tick that fades as the engine warms is the classic exhaust manifold leak — the metal seals its own crack as it expands. It's also the leak most likely to set oxygen-sensor codes.
Smell in the cabin
Exhaust smell inside the car makes any leak an urgent fix — carbon monoxide is odorless and rides along with what you can smell.
Take this to the shop
The FixDozer Diagnosis Brief puts this page on one printable sheet: what this complaint usually turns out to be, how often, and what each fix should cost — so when the diagnosis comes back, you already know whether the number fits.
Download the Diagnosis Brief (PDF)View it online · Narrow it down for your vehicle