New Location: 105 Daniel Webster Highway Merrimack NH 03054


Emission systems

Tired of spending all that time stuck in traffic and then discovering that the check engine light is on? Worried that your car might not pass its state inspection due to a bad oxygen sensor or other emission problems? 

Don’t worry because we are here to help! Our Merrimack emission systems repair technicians can handle any number of issues with your BMW’s exhaust and emission systems.

BMW Technicians and Emission Systems Experts in Nashua, NH

BMW Technicians and Emission Systems Experts in Merrimack, NH

Ultimate Bimmer Services is an independent, family-owned BMW repair shop, and we offer a wide range of BMW emission system repair services for customers in Merrimack, Hooksett, Manchester, and surrounding areas in New Hampshire. We’re ready to help with any O2 sensor replacement or catalytic converter replacement, as well as anything else that might be wrong with your exhaust system.

If we detect a problem we can fix on your BMW’s emission system, we’ll keep you in the loop every step of the way. We will not perform any procedures without your knowledge and approval. Moreover, we recommend only the necessary repairs and the most cost-effective services to our clients.

Why choose Ultimate Bimmer Services for your emission system repairs?

Just one appointment with us, and you will get noticeable results right away. These include better fuel mileage, improved performance, cleaner exhaust, and longer oil change intervals. If some exhaust components are worn beyond repair, we use only genuine BMW and factory-grade parts on replacements.

Ultimately, we will improve your car’s exhaust and help you save more in the long run. Our emission systems services go hand-in-hand with engine maintenance, so we can keep your BMW reliable for many years to come.

BMW Emission Systems Services that We Offer

BMW owners in Merrimack and surrounding areas in New Hampshire can enjoy our expansive menu of services. Here are some of the most popular ones, from the simplest to the most complex:

1. Broken gas cap replacement

The EVAP system on your BMW prevents hydrocarbons in the fuel system from leaking into the atmosphere. A broken gas cap may cause the EVAP to malfunction and trigger your check engine light.

2. Replacement of damaged sensors

If your mass airflow or O2 sensor gets damaged, the car’s computer will set off the check engine light. If left unchecked, they can increase the toxins that your car releases into the air. We offer high-quality replacement parts for all of these sensors.

3. Exhaust system repairs

Modifications like nitrous oxide injection can damage components of your exhaust system beyond repair. This leads to low-level oxygen emissions into your car’s exhaust, which can cause several problems. By having our expert technicians replace these faulty parts, you can once again be assured of cleaner exhaust gasses.

4. Vacuum hose installation and replacement

The vacuum hose supplies the engine with a constant flow of air and fuel mixture. Worn-out or damaged hoses will affect the idling of your BMW. Replacing a broken hose on your emissions systems is easy and affordable with our help.

5. BMW catalytic converter repair in Merrimack, NH

Catalytic converters are designed to reduce harmful exhaust emissions in cars. They help control the amount of carbon monoxide, hydrocarbons, nitrogen oxides, and other pollutants that come out of your vehicle’s exhaust. However, they are sensitive components within your BMW’s emission system, so call us ASAP if they suffer damage after accidents or exposure to bad weather.

6. Fuel injection system repair

Leaks and fuel starvation are among the most common problems your BMW’s emission system will face from time to time. Our technicians can perform a complete checkup of your fuel injection system and fix issues at their roots.

BMW Emission Systems Maintenance NH

We will also be glad to inspect your car’s emission systems and perform necessary repairs or replacements. This way, you can prolong the life of your vehicle for many years to come. Plus, it will help give you peace of mind knowing that your BMW is now more environment-friendly than ever before.

Emission Systems Service in Merrimack, NH

As your one-stop shop in Merrimack, we will help keep your emission systems in top condition for better performance and improved fuel economy. You can count on us to maintain the reliability and resale value of your prized BMW for many years to come.

For all your emission system repair and maintenance needs, just book an appointment online. You can also call us for more details or drive by our shop at 105 Daniel Webster Highway in Merrimack, NH 03054.

The UBS Advantage?




Based on 50+ reviews

and WE couldn’t
be happier.


Ike Twum
Ike Twum
These guys are passionate about their work. They work with professionalism. Will always go there.
Stephen Coombes
Stephen Coombes
Friendly and communicative staff, and clearly very knowledgeable about these cars. Excellent service, going above and beyond to help.
Aziz Defaa
Aziz Defaa
My car broke down while driving home from work and had to get a tow but when I called i was told they were booked until the following week when i needed the car the next day to go back to work. I Spoke to Dan who was knowledgeable about the car and thoroughly explained possible issues with it. Super friendly, professional and great service. Ended up with the car the following day and the technician stayed over time to have the car ready for me. Overall, 10/10 recommend Ultimate Bimmer for anyone who needs their car worked on.
Justin Hackett
Justin Hackett
My experience with Dan was excellent. He is a BMW enthusiast and walked me through the pictures of parts needing repair. He was honest about the work that needed to be done and what could wait. I will be bringing both of my BMWs here for all maintenance!
This review is based off my experience over the phone with Dan and Heather. First off setting up an appointment with Heather was very inviting compared to most dealers. I ended up having to cancel my appointment and I spoke to Dan. He was asking about my car a little bit and I had a few basic questions as a first time BMW owner and Dan was very nice and spent a good amount of his time talking to me about my questions. Also telling me to call or text him if I have any questions about my car in general is a awesome thing to hear. I’m definitely excited to bring my car in for a oil change and build a good relationship with this group of people!!
Kelvin Christianto
Kelvin Christianto
Thanks to keep my vehicle great again! 👍


Become a part of our Team, Team Bimmer. We look forward to being your BMW Specialists!







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READY TO Get The UBS Advantage?

Our team knows that your BMW is a precious investment that you want to stay reliable for a long time. That’s why we believe you should entrust it only to qualified and experienced luxury vehicle experts in Merrimack, NH.

For all your BMW repair and maintenance needs, just call Ultimate Bimmer Services. We will get your vehicle back on New England highways quickly and safely. Please schedule a service online or visit our automotive repair facility at 105 Daniel Webster Highway in Merrimack, NH 03054.