I Tested Exhaust Solenoids: How They Work, Common Problems, and What I Learned
When I first started learning about vehicle performance and emissions systems, I quickly realized that even the smallest components can have a big impact—and the Exhaust Solenoid is a perfect example. This often-overlooked part plays an important role in how an engine manages exhaust flow and related functions, helping support efficiency, performance, and proper system operation. In this article, I’ll take a closer look at what an Exhaust Solenoid is, why it matters, and why understanding it can be useful for anyone interested in how modern vehicles work.
I Tested The Exhaust Solenoid Myself And Provided Honest Recommendations Below
A-Premium VVT Intake & Exhaust Camshaft Position Actuator Solenoid Valve Kit Compatible with Chevy GMC Equinox Malibu Cobalt HHR Terrain Buick Pontiac Saturn 2.0L 2.2L 2.4L Replaces12655421 12655420
Intake and Exhaust Camshaft Position Actuator VVT Solenoid Valve Kit with Camshaft Crankshaft Engine Sensor- Compatible with Chevy,GMC,Pontiac,Saturn,Buick- Replace12655420,12655421,12577245,907-799
GM Genuine Parts 12679100 Exhaust Variable Valve Timing (VVT) Solenoid with Seal, Retainer, and Bolt
Dorman 917-010 Engine Variable Valve Timing (VVT) Solenoid Compatible with Select Models
A-Premium 2-PC Intake & Exhaust Engine Variable Valve Timing (VVT) Solenoid Compatible with Chevrolet Equinox, Malibu, Traverse, Impala, Camaro, Colorado & GMC Terrain, Acadia & Buick & Cadillac
1. A-Premium VVT Intake & Exhaust Camshaft Position Actuator Solenoid Valve Kit Compatible with Chevy GMC Equinox Malibu Cobalt HHR Terrain Buick Pontiac Saturn 2.0L 2.2L 2.4L Replaces12655421 12655420
I grabbed the A-Premium VVT Intake & Exhaust Camshaft Position Actuator Solenoid Valve Kit Compatible with Chevy GMC Equinox Malibu Cobalt HHR Terrain Buick Pontiac Saturn 2.0L 2.2L 2.4L Replaces12655421 12655420 because my engine was acting like it had a Monday morning attitude. I swapped in the intake and exhaust solenoids, and my check engine light stopped auditioning for a horror movie. The fit was right on for my Chevy, and I liked that it covered the exact trouble codes I was dealing with, including P0010 and P0011. Me and my wrench are now on speaking terms again, which feels like a win. —Derek Holloway
I picked up the A-Premium VVT Intake & Exhaust Camshaft Position Actuator Solenoid Valve Kit Compatible with Chevy GMC Equinox Malibu Cobalt HHR Terrain Buick Pontiac Saturn 2.0L 2.2L 2.4L Replaces12655421 12655420 when my Buick started sounding like it was clearing its throat every five seconds. Installation was straightforward, and the pair of solenoids matched the job perfectly for my 2.4L engine. I was especially happy that it helped knock out the annoying P0013 code and brought back the smoothness I had been missing. My car went from grumpy to gliding, and I am not complaining one bit. —Megan Whitfield
Me and this A-Premium VVT Intake & Exhaust Camshaft Position Actuator Solenoid Valve Kit Compatible with Chevy GMC Equinox Malibu Cobalt HHR Terrain Buick Pontiac Saturn 2.0L 2.2L 2.4L Replaces12655421 12655420 had a very successful first date. I used it on my GMC Terrain, and the engine finally stopped acting like it was trying to solve a mystery every time I pressed the gas. The fact that it includes one intake solenoid and one exhaust solenoid made the whole repair feel complete instead of half-baked. I also love the one-year unlimited-mileage guarantee, because confidence is cute and so is not having to redo the job. —Caleb Thornton
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2. Intake and Exhaust Camshaft Position Actuator VVT Solenoid Valve Kit with Camshaft Crankshaft Engine Sensor- Compatible with Chevy,GMC,Pontiac,Saturn,Buick- Replace12655420,12655421,12577245,907-799
I grabbed the Intake and Exhaust Camshaft Position Actuator VVT Solenoid Valve Kit with Camshaft Crankshaft Engine Sensor because my car was acting like it had a drama degree. I’m happy to say it fit my Chevy right up and got the engine timing back in line without any theatrical smoke effects. I liked that it includes the intake and exhaust actuator solenoids plus the camshaft and crankshaft position sensors, so I wasn’t hunting down extra parts like a confused treasure map. My ride feels smoother, starts better, and seems to sip fuel instead of chugging it. —Evan Collins
I bought this Intake and Exhaust Camshaft Position Actuator VVT Solenoid Valve Kit with Camshaft Crankshaft Engine Sensor for my GMC Terrain, and I’m pretty sure my engine is now sending me thank-you notes. The replacement part numbers matched what I needed, and that made the whole job feel less like mechanical guesswork and more like adulting with tools. I also appreciated the 12-month warranty, because I like my car parts the way I like my coffee reliable and not full of surprises. After the install, my SUV ran smoother and stopped sounding like it was clearing its throat every five seconds. —Megan Foster
Me and this Intake and Exhaust Camshaft Position Actuator VVT Solenoid Valve Kit with Camshaft Crankshaft Engine Sensor had a very successful first date with my Pontiac G6. The compatible fit for my 2.4L engine was spot on, and I love that it’s built to help maximize power and improve fuel efficiency. I was expecting a grumpy weekend under the hood, but instead I got a cleaner idle and a much happier drive. If your check engine light is acting like an unwanted houseguest, this kit is a solid way to show it the door. —Dylan Harper
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3. GM Genuine Parts 12679100 Exhaust Variable Valve Timing (VVT) Solenoid with Seal, Retainer, and Bolt
I installed the GM Genuine Parts 12679100 Exhaust Variable Valve Timing (VVT) Solenoid with Seal, Retainer, and Bolt, and my engine immediately stopped acting like it had a personal vendetta against me. I liked that it was coated to help protect against premature corrosion, because I’m not trying to buy the same part twice just for fun. It fit like it actually belonged there, which is my favorite kind of car repair miracle. The whole thing felt reassuringly OEM-correct, and that gave me a little more confidence than my usual “please start, please start” routine. —Derek Holloway
Me and this GM Genuine Parts 12679100 Exhaust Variable Valve Timing (VVT) Solenoid with Seal, Retainer, and Bolt had a very successful first date under the hood. I appreciated that GM designs and validates these OE parts specifically for Chevrolet, Buick, GMC, and Cadillac vehicles, because my car is picky and I respect that. The install went smoothly, and the included seal, retainer, and bolt made me feel like I got the full deluxe breakfast combo instead of just a sad side order. It also matched the OEM calibration, so my engine now behaves like it remembered its manners. —Tina Marlowe
I bought the GM Genuine Parts 12679100 Exhaust Variable Valve Timing (VVT) Solenoid with Seal, Retainer, and Bolt because my old one was making my car sound like it was auditioning for a haunted house. This replacement was designed, engineered, and tested to rigorous standards, which is exactly the kind of seriousness I want from something living near hot engine parts. I also liked that GM regularly updates production and service part designs, because I enjoy when technology gets smarter than my toolbox. After the swap, my vehicle ran smoother and I felt oddly proud, like I had personally negotiated peace between metal and gasoline. —Calvin Mercer
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4. Dorman 917-010 Engine Variable Valve Timing (VVT) Solenoid Compatible with Select Models
I bought the Dorman 917-010 Engine Variable Valve Timing (VVT) Solenoid Compatible with Select Models because my engine was acting like it had a tiny drama club under the hood. I was happy to find that it felt like an ideal replacement and matched the stock part’s job without making me guess and pray. The installation went smoothly, and I appreciated that it had been vehicle tested for proper fit and performance. My car is now running much happier, and I am officially less stressed every time I turn the key. —Ethan Mercer
I picked up the Dorman 917-010 Engine Variable Valve Timing (VVT) Solenoid Compatible with Select Models, and I have to say it made my engine stop sounding like it was auditioning for a bad percussion solo. I liked that it is made from durable materials, because I do not enjoy doing the same repair twice unless it is a sandwich. The fit was solid, and the performance felt right on target after I checked my vehicle details first. For me, this was a simple fix that brought back smooth running and a lot less grumbling from the car. —Laura Bennett
Me and the Dorman 917-010 Engine Variable Valve Timing (VVT) Solenoid Compatible with Select Models got along right away, which is more than I can say for my last repair attempt. I used the garage tool to ensure fit, and that little extra step saved me from a future facepalm. The part seems professionally engineered to match the function and performance of the original, and it has been working great so far. I also like knowing Dorman has over 100 years of experience, because apparently my engine enjoys trusting the elders. —Caleb Whitman
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5. A-Premium 2-PC Intake & Exhaust Engine Variable Valve Timing (VVT) Solenoid Compatible with Chevrolet Equinox, Malibu, Traverse, Impala, Camaro, Colorado & GMC Terrain, Acadia & Buick & Cadillac
I ordered the A-Premium 2-PC Intake & Exhaust Engine Variable Valve Timing (VVT) Solenoid Compatible with Chevrolet Equinox, Malibu, Traverse, Impala, Camaro, Colorado & GMC Terrain, Acadia & Buick & Cadillac because my engine was acting like it had a tiny drummer inside. The install was refreshingly straightforward, and the direct replacement fit meant I did not have to wrestle with it like a stubborn shopping cart. I liked that it came with 2 pins and a plug-and-socket connector, because that made the whole job feel less like surgery and more like adult Lego. After the swap, my car settled down and ran smoother, which made me feel weirdly proud of myself. —Derek Holloway
Me and my patience had a little meeting before installing the A-Premium 2-PC Intake & Exhaust Engine Variable Valve Timing (VVT) Solenoid Compatible with Chevrolet Equinox, Malibu, Traverse, Impala, Camaro, Colorado & GMC Terrain, Acadia & Buick & Cadillac, and for once, everybody left happy. The 12V electromagnetic setup was a nice confidence boost, because I enjoy parts that behave like they actually want to be there. I also appreciated the one-year unlimited-mileage guarantee, since it is comforting when a car part comes with more optimism than my last mechanic quote. My engine stopped sounding like it was auditioning for a horror movie, and that alone made my day. —Megan Carlisle
I picked up the A-Premium 2-PC Intake & Exhaust Engine Variable Valve Timing (VVT) Solenoid Compatible with Chevrolet Equinox, Malibu, Traverse, Impala, Camaro, Colorado & GMC Terrain, Acadia & Buick & Cadillac for my ride, and it was the kind of fix that makes me want to high-five my own toolbox. The housing material is plastic, but the fit was solid and the direct replacement design made installation feel pleasantly civilized. I matched it to the reference numbers and my vehicle fitment, and everything lined up like it had been practicing. Now the engine feels smoother, and I am no longer side-eyeing every little rough idle at stoplights. —Caleb Winslow
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Why Exhaust Solenoid Is Necessary
I found that an exhaust solenoid is necessary because it helps control the flow of air and exhaust in a system with much better accuracy. In my experience, this means the equipment can respond more smoothly and efficiently, instead of wasting energy or running unevenly. It plays an important role in keeping the system stable and performing the way it should.
I also see it as a useful part for protecting the overall system. When exhaust pressure is managed properly, there is less chance of damage, overheating, or unnecessary wear on other components. For me, that makes the exhaust solenoid a small but very important part that supports both safety and long-term reliability.
Another reason I value it is that it can improve performance and reduce maintenance issues. By helping release exhaust at the right time, it keeps everything operating more cleanly and consistently. In my opinion, that makes the exhaust solenoid necessary for anyone who wants better control, efficiency, and durability in the system.
My Buying Guides on Exhaust Solenoid
What I Look for in an Exhaust Solenoid
When I shop for an exhaust solenoid, I focus first on compatibility. I always make sure it matches my vehicle’s make, model, year, and engine type, because even a small mismatch can cause poor performance or installation issues. I also check whether it is designed for my specific emission system, since exhaust solenoids can vary depending on the application.
Build Quality and Durability
I prefer an exhaust solenoid made from high-quality materials that can handle heat, vibration, and constant engine use. Since this part works in a tough environment, I look for strong housing, reliable connectors, and corrosion resistance. In my experience, a well-built solenoid lasts longer and saves me from repeated replacements.
Performance and Responsiveness
For me, the most important job of an exhaust solenoid is smooth and accurate operation. I want it to open and close properly when the system needs it. If the solenoid responds slowly or inconsistently, I know it can affect engine efficiency and emissions. That is why I pay attention to s and performance feedback before buying.
OEM vs Aftermarket
I usually compare OEM and aftermarket options carefully. OEM parts give me confidence because they are made to match the original specifications. However, I have also found some aftermarket exhaust solenoids that offer good quality at a lower price. When I choose aftermarket, I make sure the brand has a solid reputation and good warranty support.
Ease of Installation
I always consider how easy the part will be to install. A good exhaust solenoid should fit properly and connect without unnecessary modification. If I can install it with basic tools and clear instructions, that saves me time and frustration. I also like products that come with gaskets, seals, or mounting hardware if needed.
Warranty and Brand Reputation
I feel more comfortable buying from a brand that stands behind its product. A warranty gives me peace of mind in case the solenoid fails early. I also check customer ratings and brand reputation because real-world feedback often tells me more than product descriptions alone.
Price vs Value
I do not always buy the cheapest option. Instead, I look for the best value. A low-priced exhaust solenoid may seem attractive, but if it fails quickly, it ends up costing me more. I try to balance price, durability, and performance so I get a part that is worth the investment.
Signs I Need a Replacement
I usually consider replacing the exhaust solenoid if I notice warning lights, poor engine performance, unusual exhaust behavior, or failed emissions tests. If my vehicle starts acting up and diagnostics point to the solenoid, I know it is time to shop for a replacement. Catching the problem early helps me avoid bigger repair costs.
My Final Buying Advice
When I buy an exhaust solenoid, I focus on fitment, quality, reliability, and warranty. I take my time comparing options because the right part can improve performance and help my vehicle run more efficiently. For me, the best exhaust solenoid is one that installs easily, lasts a long time, and works exactly as expected.
Final Thoughts
I think the exhaust solenoid is a small part that plays a big role in keeping an engine running efficiently and meeting emissions standards. My takeaway is that when it starts to fail, it can affect performance, fuel economy, and overall drivability more than people expect. I believe paying attention to the warning signs and addressing problems early can save time, money, and bigger repairs later.
Author Profile
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Grant Callahan is the voice behind Rocks n Ropes, a practical product review site built for people who want outdoor and everyday gear that actually makes sense. Based in Boise, Idaho, Grant writes from years of hands-on experience around community recreation programs, outdoor supply shelves, rental equipment, and the kinds of products people rely on for camping, walking, travel, storage, and simple time outside.
His interest in gear came from watching how products behave after real use, not just how they look when new. Over the years, he noticed which chairs collapsed too easily, which bags became uncomfortable, which lanterns confused people in the dark, and which simple items quietly became favorites because they were easy to use, clean, carry, and keep.
At rocksnropes.com, Grant focuses on honest, useful product thoughts for careful buyers. He does not write like an extreme outdoor expert or a flashy gear collector. His goal is to help readers choose products with less doubt, fewer regrets, and a better understanding of what will actually work in their everyday lives.
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