install a stainless steel cat-back exhaust

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GoodBoyCar
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Joined: Wed May 05, 2021 9:35 pm

Has anyone installed a stainless exhaust and experienced problems with the warranty? hope to find a suitable one soon.
n1mrod
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Does the current exhaust have any problems?
godisgreat
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Why?
You wouldn't expect a performance car like the CHR to have a louder engine when you stomp on the gas pedal, would you?
Samantha_Jones83
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Joined: Sun Mar 03, 2019 2:30 pm

I don't see the need for a C-HR when the regular factory system is sufficient.

The one and only time I shelled out cash for a custom stainless exhaust was when I was the proud owner of a 206. The standard systems had a design flaw that caused them to deteriorate every couple of years, so I opted for a custom system focused on longevity rather than sound or performance.
GoodBoyCar
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I am getting one fitted anyway, so any advice would be helpful.
David_Smith2003
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Although there are some very specific boundaries to be mindful of, installing a stainless steel exhaust will not immediately void your entire Toyota manufacturer warranty or Toyota Relax (Service Activated) Warranty:

1. How Toyota Policy and Warranty Law Interact with Adjustments

The installation of an aftermarket part does not render your entire car's warranty null and void, according to both UK consumer law and Toyota's official terms.
The downside is that the aftermarket exhaust manufacturer (like Cybox, Cobra, Longlife, or Powerflow) takes over the warranty from Toyota for the exhaust pipework and silencer. No matter how careful you are, Toyota will not pay to fix a rusty, cracked, or blown-weld stainless exhaust.
Everything that was covered before is still covered under your factory/Toyota Relax warranty, including unrelated components like your hybrid battery, e-CVT gearbox, infotainment system, suspension, and power steering.
2. Catalytic Converters and Sensors: The Hybrid Catch That Matters Most

Fitting a Cat-Back system (replacing merely the pipes and backbox behind the factory catalytic converter) virtually never causes warranty issues. But be wary of these three possible sources of contention:
In the event that a $textO_2$ sensor is damaged during installation by the exhaust installer or if an engine light ($textP0420$) or emissions fault is triggered by the altered exhaust backpressure, Toyota has the right to charge a diagnostic fee and deny a warranty claim for the sensor or ECU check.
Never remove or replace the primary catalytic converter or Petrol Particulate Filter (GPF) on a Toyota Hybrid. This applies to both cat- delete and high-flow cats. Doing so will render the emissions system warranty null and void, result in immediate failures of the MOT, and disrupt the precise mapping of the air-fuel ratio in the hybrid engine.
Floor Pan and Heat Shielding: Stainless steel exhausts made to order typically have bigger pipe diameters. Make sure the installer keeps all of the factory heat shielding and gives the hybrid high-voltage cables plenty of room to manoeuvre under the floor pan.
3. How Will It Influence the Toyota Repair and Service Warranty?

For the 10-year/100,000-mile warranty to remain valid, your vehicle must be serviced at an authorised Toyota dealership on a yearly basis:
As part of the vehicle's health inspection, main dealers will make a note that reads "Aftermarket Stainless Exhaust Fitted" on the report.
Your activation of Toyota Relax will not be cancelled. Assuming the exhaust isn't directly causing a problem (such as rubbing against the rear axle or spraying fumes onto the hybrid wiring), the remainder of the vehicle will receive its usual 12-month extended warranty.
Things to Consider Prior to Purchasing
Invest in a High-Quality Axle-Back or Cat-Back System: Be sure to retain all factory-installed sensors and catalytic converters.
Write to Your Insurance Company: A modification is what the UK calls an exhaust system that isn't standard. Failing to disclose a stainless cat-back can render your insurance policy null and void in the event of an accident, though most major insurers (Aviva, Direct Line, etc.) will accept it for a small administrative fee or premium adjustment.
Preserve the Original Factory Exhaust System: Having the stock system stored in the garage makes it easy to swap it back on if you ever decide to trade the car back to a Toyota dealership. Dealers prefer standard cars on the forecourt.
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