Catalytic Converter Replacement

Hartford, WI | Erin, WI

Get Your Catalytic Converter Replaced Quickly and Reliably

A failing catalytic converter creates serious problems for your vehicle. We handle every replacement with precision and care, getting you back on the road safely. Our team understands how critical proper emissions control and engine performance are to your daily driving. From rattling noises and check engine lights to failed emissions tests, we have the skills to fix it right. Reach out to us for honest service you can count on.

Signs You Need a Catalytic Converter Replacement

Your vehicle gives clear signals when something goes wrong. A failing catalytic converter affects performance, fuel economy, and emissions. Here's what to watch for:

• Reduced engine performance and acceleration
• Rattling noise from underneath your vehicle
• Check engine light illuminated on your dashboard
• Failed emissions testing
• Strong sulfur or rotten egg smell from exhaust
• Decreased fuel efficiency

Ignoring these symptoms can lead to more expensive repairs later. We'll diagnose the issue accurately and provide honest recommendations for your specific situation.

Why Choose M&J Auto Sales & Service

Since 2009, we've built our reputation on quality work and treating customers right. Our ASE certified technicians bring over 75 years of combined experience to every job. Here's what sets us apart:

• Locally owned and family operated business
• 12-month/24,000-mile warranty on all auto repairs
• CARFAX top-rated dealer
• Hartford, WI Chamber of Commerce member
• Works with all insurance and aftermarket warranty companies
• ASE certified technicians

We're proud of our great reputation in the community. You'll experience the same respect and honesty we'd want for our own families.

Contact Us

A faulty catalytic converter can keep you off the road and prevent you from passing emissions testing. Our experienced team will diagnose the problem, explain your options, and complete the replacement efficiently. We stand behind our work with a comprehensive nationwide warranty. Serving Hartford, Erin, and surrounding communities.

Contact us today to schedule your catalytic converter replacement and experience the difference quality service makes.