Repairs / Exhaust
Exhaust & Emissions Repair in Mississauga
Ontario road salt kills exhaust systems from the outside while short winter trips rust them from the inside. Most shops quote a full system. We weld in a section where the rest of the pipe is sound — which is usually a third of the price.
01 / Read the smoke
Colour tells you where to look
| Colour | Usually means |
|---|---|
| Thin white on a cold morning | Condensation. Normal, disappears as it warms. |
| Thick white that doesn’t clear | Coolant entering the combustion chamber — head gasket territory |
| Blue | Oil burning — valve seals, rings or a turbo seal |
| Black | Running rich — injectors, MAF, or a fuel pressure fault |
| Smell of rotten eggs | Catalytic converter working hard, or failing |
02 / Price
Exhaust and emissions work
| Job | Price |
|---|---|
| Exhaust inspection with photos | free |
| Section weld repair | from $159 |
| Flex pipe replacement | from $265 |
| Muffler replacement | from $310 |
| Oxygen sensor, per sensor | from $245 |
| Catalytic converter, aftermarket | quoted |
| EVAP smoke test | $135 |
| EGR valve clean or replace | from $290 |
| Heat shield rattle repair | from $85 |
We won’t remove a catalytic converter or defeat an emissions system. It’s illegal, it wrecks the vehicle’s resale value, and any shop willing to do it is telling you what else they’re willing to do.
Questions
The Ontario ones
Do I still need an emissions test in Ontario?
Not for a passenger car — Ontario ended Drive Clean for light-duty vehicles on 1 April 2019. Heavy diesel commercial vehicles over 4,500 kg still need an annual test to renew the plate. See fleet services.
Can a catalytic converter be repaired?
The converter itself, no. But it gets blamed constantly for faults that live elsewhere — a misfire, a leaking injector or a lazy oxygen sensor will all set efficiency codes. We confirm the converter is genuinely the failed part before quoting one, because that’s a four-figure difference.
Why has my exhaust rusted through so fast?
Salt outside, condensation inside. Short trips never get the system hot enough to dry it out, so it corrodes from both directions. Cars that only do school runs and grocery trips get through exhausts remarkably quickly here.
Is a loud exhaust a safety issue?
It can be. A leak ahead of the cabin can put exhaust gas into the interior, and that’s carbon monoxide. If it got loud suddenly, don’t drive with the windows up until it’s been looked at.