Signs to investigate
- Check-engine light with catalyst-efficiency codes
- Loss of power from an exhaust restriction
- Rattling inside the converter
- A failed emissions test or strong sulphur smell
Repair cost guidesAUSTRALIAN REPAIR COST GUIDE
Catalytic Converter Replacement Cost in Australia
Catalytic converters can fail because of misfires, oil burning or mixture problems. Fixing the underlying cause helps protect the expensive replacement part.
Calculate for my car → Free to use. No account needed.Published by David Burridge, ShiftyMechanics founder and editor. Model data dated . Guide content updated . How estimates work.
Model-based vehicle example
Catalytic Converter Replacement
2018 Kia Cerato / Forte · Australia
$1,610–$2,915Parts$1,302–$2,419
Approx. labour2.36–3.11 hours
Model-based guide awaiting source-by-source review. It is not a verified vehicle-specific quote; confirm parts, job scope and local workshop pricing. Replace one catalytic converter Confirm the repair scope and exact vehicle specification.What changes the price?
- Genuine, approved aftermarket or universal converter
- Number and location of converters
- Integrated exhaust-manifold designs
- Sensors, seized fasteners and underlying engine faults
Questions to ask the workshop
- Which test confirmed the converter has failed?
- Has the cause of the failure been identified?
- Is the part compliant for this vehicle?
- Are sensors, gaskets and labour warranty included?
Understand the repair scope
Diagnosis confirms whether the converter is chemically inefficient, physically damaged or restricted, rather than relying on a catalyst code alone.
The affected exhaust section is removed, seized fittings are dealt with carefully, and a compliant replacement is installed with new gaskets and hardware as required.
Exhaust leaks are checked, fault data is reviewed and a road test or readiness-monitor drive may be needed. The cause of contamination or overheating should be corrected first.
Checks that should support the diagnosis
A symptom alone does not prove a part has failed. Before authorising work, ask what inspection or test led to the recommendation.
- Review live oxygen-sensor data rather than the fault code alone
- Check for misfire, rich mixture, oil burning and coolant entry
- Measure exhaust back pressure or temperature where restriction is suspected
- Inspect for exhaust leaks before and around the converter
What a comparable quote normally includes
Compare like with like. A lower quote may simply cover less of the job.
- One specified catalytic converter or exhaust assembly
- Required gaskets and ordinary mounting hardware
- Removal and refitting labour
- Leak check and fault-code recheck
Possible extra work
These items are not automatically required, but they can change the bill when inspection shows they are needed.
- Oxygen sensors
- Broken studs, seized fasteners or exhaust flange repair
- Repairs for misfire, fuelling or oil-consumption faults
- Additional converters on multi-converter systems
Understand the quote before agreeing
How much does catalytic converter replacement cost in Australia?
For the 2018 Kia Cerato / Forte example shown, ShiftyMechanics estimates $1,610–$2,915. Exact parts and the workshop's actual labour rate can change the result.
Does the estimate include parts and labour?
Yes. Most jobs show modelled parts, labour and rates separately. Published supplied-and-fitted examples include installation in the advertised price. They do not provide a separate parts/labour breakdown; confirm tax, fees and fitment with the supplier.
What should a catalytic converter quote explain?
A useful written quote should identify the repair scope, the main parts being supplied, the expected labour and any likely additional work. For this job, common inclusions are one specified catalytic converter or exhaust assembly, required gaskets and ordinary mounting hardware, removal and refitting labour.
Have a quote in front of you?
Choose your car and repair to review available price references, their scope and any remaining model assumptions.
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