We’ve been a family run shop for more than 80 years, making us Maryland’s oldest still running family owned auto repair shop. That experience means every inspection and repair is done right with the honesty and care you expect from a local family business.

Emissions at Hollenshade’s
If your check engine light is on, your car failed an emissions test, or you notice rough idling or poor fuel economy, it may be time for an emissions system inspection. The emissions system helps your vehicle run cleaner and more efficiently by controlling pollutants before they exit the exhaust. When it’s not working properly, you may experience performance issues or even fail state inspection.
At Hollenshade’s, emissions service means accurate diagnostics and clear results:
- We scan your vehicle’s computer for fault codes and sensor data.
- We inspect the catalytic converter, oxygen sensors, and exhaust system.
- We repair or replace only what’s needed to meet state standards.
- Most emissions related repairs are completed the same day.
Our certified technicians use:
Professional grade diagnostic scanners for precise readings.
OEM quality replacement parts for lasting performance.
Proven repair methods that restore proper emissions control.
Value is more than passing a test it’s keeping your vehicle efficient, reliable, and environmentally responsible.
We keep you informed throughout your visit, explaining what caused the issue and what needs to be done.
Our technicians go beyond clearing warning lights. They test sensors, wiring, and vacuum lines to confirm your car’s emissions system is performing correctly before you leave.

We tailor service for different needs:
- Daily drivers: Reliable fixes that restore fuel efficiency.
- Fleets and work vehicles: Timely emissions testing to stay compliant.
- Older vehicles: Practical solutions to meet inspection standards.
- Newer vehicles: Diagnostic accuracy for complex computer controlled systems.
We remove common hesitations with:
- Clear, upfront pricing and repair options.
- Same day testing and service.
- Quality parts and careful installation.
- Transparent updates throughout the process.
- A reputation built on eight decades of trust and integrity.