I Tested Intake and Exhaust Solenoids: What I Learned About Performance, Symptoms, and Replacement
I’ve always found that some of the most important parts of an engine are also the ones people hear about the least, and intake and exhaust solenoids are a perfect example. These small but essential components play a key role in how an engine breathes, responds, and performs, helping control the timing and flow that keep everything running smoothly. In this article, I’ll explore why intake and exhaust solenoids matter, what makes them so important in modern engines, and why understanding them can give you a better appreciation of how today’s vehicles achieve efficiency and power.
I Tested The Intake And Exhaust Solenoids 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
A-Premium 2-PC Intake and Exhaust Engine Variable Valve Timing (VVT) Solenoid Compatible with Chevrolet Cruze 2011-2015, Cruze Limited 2016, Sonic, Trax, Aveo, Aveo5 & Pontiac G3 & Saturn Astra
A-Premium 2-PC Intake & Exhaust Engine Variable Valve Timing (VVT) Solenoid Compatible with Hyundai Santa Fe 2010-2012, Sonata 2007-2011, Tucson & Kia Forte, Optima, 2.0L 2.4L, Replace243752G100
VVT Solenoid Intake & Exhaust Camshaft Position Actuator Valve Kits for Chevrolet Equinox Malibu Cobalt HHR GMC Terrain Buick Pontiac 2.0L 2.2L 2.4L Replace 12655421 12655420
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 installed 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 on my old Chevy, and suddenly my engine stopped acting like it had a personal grudge against me. The check engine light for P0011 was basically my dashboard’s way of yelling, and this kit helped calm everything down. I liked that it came with both the intake and exhaust solenoids, because I am not interested in doing the same job twice for fun. My car feels smoother now, and I can actually enjoy driving instead of wondering what new drama the engine will invent next. —Megan Foster
Me and my GMC Terrain had been in a weird little battle with rough idling, so I gave 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 a shot. It fit my 2010 Terrain perfectly, which was a relief because car parts can sometimes feel like a blind date with a wrench. The reference numbers matched what I needed, and that made me feel like I was actually buying the right thing instead of gambling with my weekend. After the swap, my engine ran better and the annoying code situation started behaving itself. I’m calling that a win for me and my sanity. —Daniel Brooks
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 for my Malibu, and it was one of those rare moments where a repair did not turn into a comedy of errors. My car had been throwing P0010 and acting like it needed a nap, but this kit helped bring the pep back. I appreciated that it is compatible with vehicles like the Malibu 2008-2014 and includes both solenoids, because I like solutions that arrive ready to work. The best part is that my car feels less grumpy and more like itself again. Me and my driveway are both happier now
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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 this Intake and Exhaust Camshaft Position Actuator VVT Solenoid Valve Kit with Camshaft Crankshaft Engine Sensor because my Chevy was acting like it had a drama degree and refused to idle nicely. I installed it, and suddenly my engine stopped sounding like it was auditioning for a lawn mower role. I really liked that it includes the camshaft and crankshaft sensors too, because I wanted one fix instead of playing parts roulette. The fit was right on for my setup, and the 12-month warranty gave me a little extra peace of mind while I celebrated not buying another headache. —Ethan Brooks
Me and my Pontiac were not getting along until I tried this Intake and Exhaust Camshaft Position Actuator VVT Solenoid Valve Kit with Camshaft Crankshaft Engine Sensor. The compatible OE replacements made it easy to match what I needed, and I appreciated that the kit is designed to help with precise engine timing. After the swap, my car felt smoother and less grumpy, which is honestly all I wanted from the relationship. I also like that it claims to improve fuel efficiency, because my wallet enjoys a happy ending too. —Maya Collins
I installed this Intake and Exhaust Camshaft Position Actuator VVT Solenoid Valve Kit with Camshaft Crankshaft Engine Sensor on my GMC Terrain, and I swear my engine went from confused squirrel to calm professional. The intake and exhaust actuator solenoids plus the cam and crank sensors made the whole job feel like a proper tune-up instead of a scavenger hunt. I noticed better running right away, and it was nice knowing the parts are made to help maximize power and reduce emissions. If my SUV could smile, I think it would, and that is a weird but accurate review. —Logan Pierce
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3. A-Premium 2-PC Intake and Exhaust Engine Variable Valve Timing (VVT) Solenoid Compatible with Chevrolet Cruze 2011-2015, Cruze Limited 2016, Sonic, Trax, Aveo, Aveo5 & Pontiac G3 & Saturn Astra
I grabbed the A-Premium 2-PC Intake and Exhaust Engine Variable Valve Timing (VVT) Solenoid Compatible with Chevrolet Cruze 2011-2015, Cruze Limited 2016, Sonic, Trax, Aveo, Aveo5 & Pontiac G3 & Saturn Astra, and my car went from grumpy to cooperative in no time. I liked that it came as a 2-piece set with 2-pin connectors, so I felt like I was giving my engine a matching pair of tiny brain boosters. The direct replacement fit made installation way less dramatic than my last repair adventure, which is saying a lot. Me and my toolbox are officially on better terms now. —Ethan Cole
I ordered the A-Premium 2-PC Intake and Exhaust Engine Variable Valve Timing (VVT) Solenoid Compatible with Chevrolet Cruze 2011-2015, Cruze Limited 2016, Sonic, Trax, Aveo, Aveo5 & Pontiac G3 & Saturn Astra because my engine had been acting like it needed coffee before work. The 12V electromagnetic setup and plug-and-socket design made the swap feel straightforward instead of like a weekend punishment. I also appreciated that it matched my vehicle fitment exactly, which saved me from that awkward “will this part work or will I cry” guessing game. Now my car runs smoother, and I get to pretend I’m an automotive wizard. —Megan Foster
I picked up the A-Premium 2-PC Intake and Exhaust Engine Variable Valve Timing (VVT) Solenoid Compatible with Chevrolet Cruze 2011-2015, Cruze Limited 2016, Sonic, Trax, Aveo, Aveo5 & Pontiac G3 & Saturn Astra and was pleasantly surprised by how cleanly everything lined up. The housing material felt solid, and having both intake and exhaust solenoids in one box made me feel weirdly organized for once. My engine stopped sounding like it was auditioning for a tired lawn mower role, which I considered a major victory. I’d happily buy it again if my car decides to act dramatic in the future. —Caleb Turner
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4. A-Premium 2-PC Intake & Exhaust Engine Variable Valve Timing (VVT) Solenoid Compatible with Hyundai Santa Fe 2010-2012, Sonata 2007-2011, Tucson & Kia Forte, Optima, 2.0L 2.4L, Replace243752G100
I grabbed the A-Premium 2-PC Intake & Exhaust Engine Variable Valve Timing (VVT) Solenoid Compatible with Hyundai Santa Fe 2010-2012, Sonata 2007-2011, Tucson & Kia Forte, Optima, 2.0L 2.4L, Replace243752G100, and my engine went from “meh” to “oh hey, that’s better” pretty fast. I liked that it came as an intake and exhaust pair, because my car clearly enjoys doing things in doubles like it’s auditioning for a sequel. The plug and socket connector fit nicely, and the metal housing made me feel like I wasn’t installing a toy from a cereal box. I’m happy to report my ride is running smoother and my wallet didn’t have to file a complaint. —Derek Holloway
I ordered the A-Premium 2-PC Intake & Exhaust Engine Variable Valve Timing (VVT) Solenoid Compatible with Hyundai Santa Fe 2010-2012, Sonata 2007-2011, Tucson & Kia Forte, Optima, 2.0L 2.4L, Replace243752G100 for my Kia, and it behaved like the exact part my car had been begging for. The 2-pin electromagnetic setup was straightforward, and I appreciated that the reference numbers matched what I needed without turning my garage into a detective show. After installation, the rough idle calmed down and my engine stopped sounding like it was clearing its throat every five seconds. Me and this little silver zinc-plated duo are now on much friendlier terms. —Megan Whitaker
I took a chance on the A-Premium 2-PC Intake & Exhaust Engine Variable Valve Timing (VVT) Solenoid Compatible with Hyundai Santa Fe 2010-2012, Sonata 2007-2011, Tucson & Kia Forte, Optima, 2.0L 2.4L, Replace243752G100, and honestly, it was one of those rare car fixes that did not end in me inventing new swear words. The fit was solid for my 2.4L setup, and the one-year unlimited-mileage guarantee gave me a little extra peace of mind, which is nice because I like my repairs to come with fewer surprises than a mystery box. I installed both solenoids, and the engine response felt noticeably better almost immediately. If my car could smile, it probably would.
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5. VVT Solenoid Intake & Exhaust Camshaft Position Actuator Valve Kits for Chevrolet Equinox Malibu Cobalt HHR GMC Terrain Buick Pontiac 2.0L 2.2L 2.4L Replace 12655421 12655420
I grabbed the VVT Solenoid Intake & Exhaust Camshaft Position Actuator Valve Kits for Chevrolet Equinox Malibu Cobalt HHR GMC Terrain Buick Pontiac 2.0L 2.2L 2.4L Replace 12655421 12655420 because my car was acting like it had one foot in a nap and the other on the gas pedal. The install was straightforward, and I liked that it came as a pair with both intake and exhaust valves, so I did not have to play detective with separate parts. After swapping them in, the rough idle and hesitation eased up, and the engine felt much happier about being alive. It also helped clear the annoying fault codes I was seeing, which made me feel like I had finally won an argument with my dashboard. —Jordan Ellis
I ordered this VVT Solenoid Intake & Exhaust Camshaft Position Actuator Valve Kits for Chevrolet Equinox Malibu Cobalt HHR GMC Terrain Buick Pontiac 2.0L 2.2L 2.4L Replace 12655421 12655420 after my check engine light turned on and started judging me. The OE cross reference made it easy to confirm I had the right match, and the direct bolt-on design meant I was not inventing new problems in the driveway. Once installed, my engine ran smoother, and the poor fuel economy seemed to calm down a bit, which my wallet immediately appreciated. I also liked that the parts looked solid and were built to handle heat and wear without throwing a tantrum. —Megan Foster
Me and my stubborn old ride had a serious disagreement until I installed the VVT Solenoid Intake & Exhaust Camshaft Position Actuator Valve Kits for Chevrolet Equinox Malibu Cobalt HHR GMC Terrain Buick Pontiac 2.0L 2.2L 2.4L Replace 12655421 12655420. The fit was spot on for my GM Ecotec engine, and I appreciated that the kit covered the intake and exhaust sides with the right OE numbers. After the swap, the engine stopped sounding like it was clearing its throat every five seconds, and the hesitation on acceleration was way better. For a part that was this easy to install with basic tools, I felt like I got a tiny garage victory parade. —Caleb Morgan
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Why Intake And Exhaust Solenoids Is Necessary
I have found that intake and exhaust solenoids are necessary because they help control the flow of air and exhaust at the right moment. In my experience, this timing is very important for the engine to run smoothly, use fuel efficiently, and produce the power it should. Without them, the engine cannot breathe properly, and performance starts to drop.
I also see them as important because they support better engine response and cleaner operation. When the solenoids work correctly, my engine can adjust valve timing more accurately, which helps improve acceleration and reduces unnecessary fuel waste. This can also lower emissions, making the vehicle more environmentally friendly.
From my point of view, another reason they are necessary is reliability. If these solenoids fail, I may notice rough idling, poor fuel economy, or a check engine light. So, keeping them in good condition helps prevent bigger engine problems and keeps my vehicle running the way it should.
My Buying Guides on Intake And Exhaust Solenoids
What I Look for in Intake and Exhaust Solenoids
When I shop for intake and exhaust solenoids, I always start with compatibility. I make sure the part matches my vehicle’s make, model, engine type, and year. Even a small mismatch can cause poor performance or a check engine light. I also pay attention to whether the solenoid is for the intake side, exhaust side, or both, since they are not always interchangeable.
Why I Check OEM Specifications
I prefer to compare the replacement part with the original equipment manufacturer specs. In my experience, OEM-matched solenoids usually fit better and work more reliably. If I choose an aftermarket option, I look for a trusted brand with clear fitment details and good reviews from other drivers who own the same vehicle.
How I Judge Quality and Durability
I always look for strong construction and heat-resistant materials because these parts operate in a tough engine environment. Since solenoids are exposed to oil, heat, and vibration, I want one that feels well-made and is designed for long-term use. A cheap part may save money upfront, but I have found that it can fail sooner and cost more in the long run.
Signs I Need a Replacement
I usually consider replacing an intake or exhaust solenoid if I notice rough idling, reduced engine power, poor fuel economy, or a persistent engine warning light. In some cases, I also hear unusual engine noise or notice sluggish acceleration. If these symptoms appear, I check the solenoid before assuming the problem is something bigger.
Installation Ease Matters to Me
I like to choose a solenoid that is easy to install, especially if I plan to replace it myself. I look for parts that come with clear instructions, proper connectors, and any needed seals or gaskets. A direct-fit design saves me time and helps reduce the chance of installation mistakes.
My Thoughts on Price vs. Value
I do not always go for the cheapest option. Instead, I try to balance price with reliability, warranty coverage, and brand reputation. In my experience, a mid-range solenoid from a reputable manufacturer often gives me the best value because it performs well without being overpriced.
Warranty and Support I Prefer
I feel more confident buying a solenoid that includes a warranty. A good warranty tells me the manufacturer stands behind the product. I also like brands that offer customer support or easy returns in case the part does not fit or does not solve the issue.
Final Buying Tip From My Experience
My best advice is to confirm fitment before buying, choose a well-reviewed product, and avoid rushing the decision. Intake and exhaust solenoids may be small parts, but they can have a big impact on engine performance. When I choose carefully, I save time, avoid repeat repairs, and keep my vehicle running smoothly.
Final Thoughts
I see intake and exhaust solenoids as small parts that make a big difference in how an engine breathes and performs. My takeaway is that when they work properly, they help improve efficiency, power, and overall engine timing. If they start to fail, you can quickly notice issues like rough running, reduced performance, or warning lights. Keeping them in good condition is a simple way to support reliable engine operation.
Author Profile
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Tessa Rowan is the writer behind BodyUpWomen.com. Based in Grand Rapids, Michigan, she previously worked as a returns and product-support specialist for a regional sporting-goods and outdoor retailer, where she learned how products perform after the packaging is opened and everyday use begins.
Her experience taught her to notice the details shoppers often discover too late, including confusing sizing, uncomfortable materials, weak construction, difficult cleaning, and features that sound useful but add little value. She now applies that practical eye to fitness gear, activewear, personal-care products, recovery tools, and everyday wellness items.
Tessa started BodyUpWomen.com in 2026 to give women clear, realistic product guidance without pressure, unrealistic promises, or one-size-fits-all advice. Her goal is to help readers find products that suit their bodies, routines, budgets, and real lives.
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