If your car is running rough, losing power, or smelling funky, it could be a sign that your catalytic converter is on its last legs. As a mobile mechanic who’s seen my fair share of faulty catalytic converters, I’m here to break down the symptoms, causes, and costs of this common car problem.
What are the symptoms of a failing catalytic converter?
- Check engine light: If your catalytic converter isn’t working properly, your car’s computer will let you know by turning on the check engine light.
- Poor acceleration and engine performance: A clogged catalytic converter restricts exhaust flow, causing your engine to lose power and accelerate sluggishly.
- Rotten egg smell: When your catalytic converter fails, it can’t properly convert hydrogen sulphide in the exhaust into odourless sulphur dioxide, leading to a distinct rotten egg smell.
- Rattling noises: A rattling sound coming from under your car could indicate that the honeycomb-shaped catalyst inside the converter has broken apart.
- Excessive heat: A clogged catalytic converter can cause your exhaust to overheat, sometimes even glowing red.
What causes catalytic converter failure?
- Physical damage from road debris or bottoming out
- Engine misfires or oil leaks that contaminate the catalyst
- Unburned fuel entering the exhaust due to a faulty oxygen sensor or fuel injector
- Coolant leaks from a blown head gasket
What does catalytic converter repair involve?
In most cases, a failing catalytic converter needs to be replaced entirely. This involves:
- Disconnecting the old converter from the exhaust system
- Installing a new catalytic converter (either direct-fit or universal)
- Replacing any damaged exhaust components, like gaskets or oxygen sensors
- Reprogramming the car’s computer to recognise the new converter
How much does catalytic converter replacement cost in New Zealand?
The cost of replacing a catalytic converter varies depending on your car’s make and model, but you can expect to pay anywhere from $1,000 to $2,500+ for parts and labour. Some luxury or performance vehicles may have even higher replacement costs.
Why choose My Auto Shop for catalytic converter replacement?
At My Auto Shop, we understand that catalytic converter problems can be stressful and expensive. That’s why we offer convenient, transparent, and affordable mobile mechanic services across New Zealand. Here’s why we’re the best choice for your catalytic converter replacement:
- We come to you, saving you time and hassle
- Our experienced mechanics diagnose the problem accurately
- We use high-quality replacement parts backed by a warranty
- We offer upfront, competitive pricing with no hidden fees
- Our friendly, professional service has earned us a 4.9-star Google rating
Don’t let a failing catalytic converter slow you down. If you’re experiencing any of the symptoms mentioned above, book an appointment with My Auto Shop today. We’ll get your car running smoothly again in no time.