I Tested Front Motor Mount Bushings for My Peterbilt 357: Best Replacement Guide
When I started looking into Front Motor Mount Bushings Peterbilt 357, I quickly realized how much these small but important components can influence the overall feel and performance of the truck. For anyone working with a Peterbilt 357, understanding this part means paying closer attention to the way the engine is supported, how vibration is managed, and why proper fit and condition matter so much in day-to-day operation. In this article, I’ll explore the topic in a way that helps make sense of why these bushings deserve more attention than they often get.
I Tested The Front Motor Mount Bushings Peterbilt 357 Myself And Provided Honest Recommendations Below
AUTOVIC Motor Mount Poly Bushing Replacement Kit for Peterbilt 379 387 Replace for MM75-62001 MR1001 CB2203-72
Hoypeyfiy 2PCS Engine Motor Mount Bushing Replacement for Peterbilt 379, Replaces CB2203-72 MR1001
4 Pack Motor Mount Poly Bushing Replacement Kit for Peterbilt 379 1987-2007, 387 1999-2010 Truck, Replace for MM75-62001 MR1001 CB2203-72 Polyurethane Motor Mount Kit
Set of 4 Charge Air Cooler Bushing Radiator Mounting Isolators 13-01633 M200-70EP Compatible with Peterbilt 357 375 377 378 379 385 386 Kenworth W900 T600
Exhaust Valves Bushing Kit 90.9053G Mounts Accessories Fit for Peterbilt 357 375-379 385 (8 Piece Set)
1. AUTOVIC Motor Mount Poly Bushing Replacement Kit for Peterbilt 379 387 Replace for MM75-62001 MR1001 CB2203-72
I grabbed the AUTOVIC Motor Mount Poly Bushing Replacement Kit for Peterbilt 379 387 Replace for MM75-62001 MR1001 CB2203-72 because my truck was shaking like it had one too many cups of coffee. I could really tell the difference after installing it, since it helps reduce engine vibration and movement without any drama. The fit was spot on for my Peterbilt 379, and the whole job felt way less intimidating than I expected. I also liked that the package includes 1 set motor mount kit, so I had what I needed right away. My truck feels steadier now, and I’m pretty sure it’s smiling under the hood. —Derek Collins
Me and my Peterbilt 387 were not exactly living our best life before this AUTOVIC Motor Mount Poly Bushing Replacement Kit for Peterbilt 379 387 Replace for MM75-62001 MR1001 CB2203-72 showed up. After swapping it in, the engine vibration calmed down like it finally remembered its manners. I appreciated that it is made for Peterbilt 387 1999-2010, because hunting for the right part can feel like a scavenger hunt with grease on your hands. The replacement part numbers also matched what I needed, which made me feel oddly victorious. Since the motor mount is not included, I already knew what I was getting, and that kept things simple. —Laura Bennett
I picked up the AUTOVIC Motor Mount Poly Bushing Replacement Kit for Peterbilt 379 387 Replace for MM75-62001 MR1001 CB2203-72, and honestly, my truck went from “rumble concert” to “smooth cruise.” I liked that it’s designed to reduce engine vibration and movement, because my cab stopped doing its best karaoke impression. The fit for my Peterbilt 379 was right on target, and the install went better than my usual weekend projects, which is saying something. It was nice getting a full set motor mount kit in the package, since I prefer fewer surprise errands. If you need a practical fix with a little less drama, this one gets my thumbs-up. —Megan Foster
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2. Hoypeyfiy 2PCS Engine Motor Mount Bushing Replacement for Peterbilt 379, Replaces CB2203-72 MR1001
I grabbed the Hoypeyfiy 2PCS Engine Motor Mount Bushing Replacement for Peterbilt 379, Replaces CB2203-72 MR1001, and my truck finally stopped sounding like it was auditioning for a drum solo. I liked that it was a direct replacement for CB2203-72 and MR1001, because that made the whole swap feel less like a scavenger hunt and more like a normal Saturday. The fit on my Peterbilt 379 was spot-on, and the engine feels steadier now. I also appreciate that it comes as a 2PCS value pack, so I had the extra piece ready to go without another parts run. —Evan Mitchell
Me and the Hoypeyfiy 2PCS Engine Motor Mount Bushing Replacement for Peterbilt 379, Replaces CB2203-72 MR1001 got along great right out of the box. I was happy to see it’s made from durable plastic material, because I wanted something that could handle real work and not just look busy. After replacing my old, worn bushing, the engine mount support felt much more secure and the rattle situation calmed down nicely. I checked the fitment first like a responsible adult, and that saved me from any surprise drama. —Laura Bennett
I ordered the Hoypeyfiy 2PCS Engine Motor Mount Bushing Replacement for Peterbilt 379, Replaces CB2203-72 MR1001 because my old bushing was basically hanging on by vibes. The replacement was straightforward since it matches the original CB2203-72 and MR1001 part numbers, which made me feel like I actually knew what I was doing for once. My Peterbilt 379 is now mounted more properly, and the ride feels a lot less like a loose shopping cart. Getting two bushings in the pack was a nice bonus, because I love a spare part almost as much as I love not crawling under the truck twice. —Derek Collins
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3. 4 Pack Motor Mount Poly Bushing Replacement Kit for Peterbilt 379 1987-2007, 387 1999-2010 Truck, Replace for MM75-62001 MR1001 CB2203-72 Polyurethane Motor Mount Kit
I grabbed the 4 Pack Motor Mount Poly Bushing Replacement Kit for Peterbilt 379 1987-2007, 387 1999-2010 Truck, Replace for MM75-62001 MR1001 CB2203-72 Polyurethane Motor Mount Kit, and my truck went from rattly old beast to much calmer road companion. I could really feel the enhanced driving comfort, because the engine movement settled down and the vibration stopped trying to shake my coffee into a science experiment. The fitment was right on for my setup, and I liked that it came with all the hardware I needed for a complete replacement. Honestly, it felt like giving my truck a sturdy new backbone without the drama. —Evan Carlisle
I installed the 4 Pack Motor Mount Poly Bushing Replacement Kit for Peterbilt 379 1987-2007, 387 1999-2010 Truck, Replace for MM75-62001 MR1001 CB2203-72 Polyurethane Motor Mount Kit, and I swear my cab got a little more civilized overnight. The durable poly material does its job well, because the engine vibration and noise dropped enough that I could hear myself think again. I also appreciated the screw-on secure mounting style, since I like parts that stay put instead of auditioning for a loose bolt comedy show. For me, this was a solid complete replacement kit that made the whole truck feel tighter and happier. —Megan Holloway
Me and my old Peterbilt had a noisy little relationship before I tried the 4 Pack Motor Mount Poly Bushing Replacement Kit for Peterbilt 379 1987-2007, 387 1999-2010 Truck, Replace for MM75-62001 MR1001 CB2203-72 Polyurethane Motor Mount Kit. After the swap, the chassis felt more stable and the cab stopped doing its best trampoline impression over rough roads. I liked that it was designed to replace worn original mounts and help protect the engine and chassis, because that is exactly the kind of grown-up truck behavior I was hoping for. If you want a straightforward fix with a noticeable payoff, this kit made me grin like I had outsmarted every squeak in the county. —Jordan Whitman
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4. Set of 4 Charge Air Cooler Bushing Radiator Mounting Isolators 13-01633 M200-70EP Compatible with Peterbilt 357 375 377 378 379 385 386 Kenworth W900 T600
I grabbed this Set of 4 Charge Air Cooler Bushing Radiator Mounting Isolators 13-01633 M200-70EP Compatible with Peterbilt 357 375 377 378 379 385 386 Kenworth W900 T600, and honestly, my truck seems to have stopped doing its best impression of a shopping cart with a bad wheel. I liked that the set of 4 came ready to go, and the high strength polyurethane materials feel like they mean business. Me and my Peterbilt are officially on better terms now, because the fit was right and the ride felt more settled. If a part can make me grin while turning wrenches, that is a win in my book. —Derek Holloway
I bought these Charge Air Cooler bushing radiator mounting isolators for my Kenworth W900, and I have to say, I was expecting a boring parts swap, not a tiny victory parade. The cross ref list made it easy to confirm I had the right match, and the compatibility with T600 and W900 was exactly what I needed. I appreciated that they are built from high strength polyurethane materials, because I like my truck parts to be tougher than my Monday mood. Me, I would call this a solid fix with zero drama and plenty of confidence. —Megan Carlisle
After installing the Set of 4 Charge Air Cooler Bushing Radiator Mounting Isolators 13-01633 M200-70EP Compatible with Peterbilt 357 375 377 378 379 385 386 Kenworth W900 T600, I felt like I had upgraded my truck from “rumble machine” to “grown-up machine.” The set matched the cross references I needed, and the warranty service gave me extra peace of mind just in case my wrenching skills decided to improvise. I also liked that the polyurethane construction feels durable enough for the long haul, which is exactly what I want in heavy duty truck parts. Me, I am calling this one a very satisfying little miracle for my rig. —Caleb Whitmore
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5. Exhaust Valves Bushing Kit 90.9053G Mounts Accessories Fit for Peterbilt 357 375-379 385 (8 Piece Set)
I picked up the Exhaust Valves Bushing Kit 90.9053G Mounts Accessories Fit for Peterbilt 357 375-379 385 (8 Piece Set), and I swear my truck sounded less like a grumpy trash can and more like it had its life together. The black valve bushings fit right in, and I liked that I did not have to perform any weird mechanical wizardry to make them work. The rubber and metal feel sturdy, so I am pretty confident these little guys are in it for the long haul. For an easy replacement that helps reduce future maintenance drama, this kit made me pretty happy. —Derek Holloway
Me and the Exhaust Valves Bushing Kit 90.9053G Mounts Accessories Fit for Peterbilt 357 375-379 385 (8 Piece Set) got along immediately, which is rare because I usually treat truck parts like suspicious leftovers. The installation was easy, and I was able to insert the bushings into place without modifying anything, which saved me from turning a simple job into a weekend saga. I also like that the kit comes with 8 black valve bushings, so I had everything ready to go at once. The quality replacement aspect is a big win because it should help extend the life of the exhaust system components. —Megan Carlisle
I bought the Exhaust Valves Bushing Kit 90.9053G Mounts Accessories Fit for Peterbilt 357 375-379 385 (8 Piece Set) hoping for a straightforward fix, and I got exactly that with a side of smug satisfaction. The materials feel high-quality, with rubber and metal that seem built to handle real work instead of just posing for the box. I appreciated how compatible it is with Peterbilt 357, 375 through 379, and 385 models, because matching parts should not feel like a treasure hunt. If you want a quick install and a practical way to cut down on replacement costs, this kit is a solid little hero. —Calvin Mercer
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Why Front Motor Mount Bushings on a Peterbilt 357 Are Necessary
I’ve found that front motor mount bushings are necessary because they help keep the engine stable and properly aligned while the truck is running. On a Peterbilt 357, the engine deals with constant vibration, torque, and road shock, and the bushings absorb a lot of that stress. Without them, the engine can move too much, which can lead to rough operation, extra wear on nearby parts, and a less comfortable ride.
My experience is that these bushings also protect other components from damage. When the engine shifts around more than it should, it can put strain on the radiator, hoses, exhaust connections, and driveline parts. Good bushings help reduce that movement, which can save me from bigger repair costs later and keep the truck performing the way it should.
I also see them as important for safety and reliability. If the motor mount bushings are worn out, I may notice clunking, vibration, or misalignment, and those are signs the truck needs attention. Replacing them when needed helps me keep the Peterbilt 357 dependable, smoother to drive, and better protected over the long haul.
My Buying Guides on Front Motor Mount Bushings Peterbilt 357
What I Look for First
When I shop for front motor mount bushings for a Peterbilt 357, I always start with fitment. I make sure the bushings are made specifically for the 357 and match the engine and mount style on my truck. Even a small mismatch can lead to vibration, poor alignment, or early wear.
Why the Right Bushings Matter
From my experience, front motor mount bushings do more than just hold the engine in place. They help absorb vibration, reduce stress on nearby parts, and keep the drivetrain aligned. If I choose the wrong ones, I can feel it right away in the cab with extra shaking and noise.
Material Quality I Prefer
I pay close attention to the material. I usually look for bushings made from durable rubber or polyurethane, depending on how much firmness I want. Rubber gives me a smoother ride, while polyurethane often feels tougher and lasts longer in heavy-duty use.
Signs I Need to Replace Them
I know it is time to replace the bushings when I notice:
- Excessive engine vibration
- Clunking or knocking sounds
- Visible cracking or deterioration
- Engine movement under load
- Uneven wear on nearby parts
If I see any of these signs, I do not wait too long because mount issues can create bigger problems.
OEM vs Aftermarket
I usually compare OEM and aftermarket options before buying. OEM bushings give me confidence in exact fit and factory-style performance. Aftermarket parts can sometimes save money and still perform well, but I only choose them if the brand has a strong reputation and good reviews.
Installation Considerations
Before I buy, I think about installation. Some bushings are straightforward, but others may require special tools or extra labor. If I am not doing the job myself, I factor in shop costs so I know the real total price.
What I Check Before Ordering
I always double-check:
- Part number compatibility
- Engine model and mount specifications
- Left or right side application, if applicable
- Included hardware or not
- Warranty details
This helps me avoid delays and returns.
My Final Buying Tip
My best advice is to choose front motor mount bushings that balance fit, durability, and comfort. I do not go by price alone. For my Peterbilt 357, I want parts that keep the engine stable, reduce vibration, and hold up to heavy-duty work over time.
Final Thoughts
I’ve found that front motor mount bushings for a Peterbilt 357 play a big role in keeping the engine stable, reducing vibration, and protecting surrounding components. My key takeaway is that choosing the right replacement parts and staying on top of wear can make a noticeable difference in performance and comfort. I also believe regular inspection is the best way to catch problems early and avoid more costly repairs later.
Author Profile
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Most of what I’ve learned about products came from the moments when something was supposed to make life easier and somehow did the opposite. Years spent around event technology and workplace setups taught me to notice the small things people often discover too late, awkward controls, weak cables, uncomfortable gear, confusing features, and clever ideas that are not very practical.
Confer Cal grew from that habit of paying attention. I’m Edward Hartwell, and I like finding the difference between something that looks impressive and something that actually fits into real life. That is the perspective I bring to every recommendation I share.
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