Summary of Reddit Comments on the Best Sensors for Emissions

Suggested Sensors for Emissions

• MAF sensor: "MAF sensor will take $35 and 1 minute to replace."
  • Pros: Affordable and easy to replace.
  • Cons: May not always resolve more complex emission issues.
• O2 sensors: "Had a trusted mechanic tell me he could start with 02 sensors."
• MAP sensor: "Failed MAF or MAP sensor could lead to emissions issues."
  • Pros: Measures air flow accurately.
  • Cons: May require cleaning or replacement if malfunctioning.

Recommendations Regarding Car Purchase

• Avoid Carvana for car purchases due to potential issues with vehicles: "Carvana buys people's problem cars and doesn't bother to check them."
• Return the car if there are any red flags, especially related to emissions: "Don’t overthink this. Return it, that’s why there’s a trial period."
• Consider buying a Subaru Crosstrek instead of a Forester to avoid potential CVT transmission issues.

General Advice for Emissions

• Conduct regular maintenance to prevent emission-related problems: "Use OEM parts whenever you can as they will last much longer and work best with the car."
• Be prepared for potential costly repairs related to emissions: "If it’s an option, find a dealership near you with a similar car. The sticker might be more, but you can negotiate with a real dealership and you’ll save likely thousands on repairs."

Potential Issues with Emission Tests

• Aging vehicles may face challenges with emissions tests: "Don’t old cars eventually age out of emissions tests? Your truck is 30 years old."
• Consider moving to areas without emissions tests if possible: "Here's another solution: move to Alaska. No emissions tests."

Vehicle-Specific Suggestions

• For Toyota FJ60 owners, consider fitting an oil catch can to prevent EGR system clogging.
• Assorted comments regarding Jeeps and their performance.

This summary emphasizes the importance of quality sensors like MAF and MAP sensors for emissions testing, caution against purchasing from Carvana, and the necessity of regular maintenance to avoid emission-related issues.