I still remember the first Dorman drive shaft center support bearing I bought. It came in a red box, the kind that doesn’t say much about what’s inside. The technician who opened it looked at the bearing, then at the part number, then back at me. “You didn’t buy the whole driveshaft?” he asked.
No. And that was the start of a pretty big shift in how I order parts.
I’m the office administrator for a 14-shop independent repair and fleet maintenance group. During the day, I’m not the one with a wrench. I’m the one who manages the purchase orders, the invoicing, and the vendor relationships. In a normal year I order around $190,000 worth of parts across 11 vendors. Actually 12 vendors now—I keep forgetting the new exhaust supplier. I report to both operations and finance, which means I get asked about cost savings and warranty claims, sometimes in the same meeting.
Dorman drive shaft center support bearing: the review that convinced me
It started with a Chevy Express van in our fleet. The complaints were pretty standard: a clunk under the cargo area around 45 mph, and a vibration that got worse with speed. The technician who inspected it said the center support bearing was shot. His first suggestion was to replace the whole driveshaft, which came in around $680 from the OE supplier (prices as of January 2025; verify current rates).
So I did what anyone with a parts budget does: I searched “Dorman drive shaft center support bearing reviews.” What I found surprised me. A lot of independent mechanics had used them, and the reviews were generally positive—with some clear exceptions where people mentioned fitment issues. The Dorman part was about half the price of the OE assembly.
I ordered it, and the install went okay. The bearing sat in the same bracket position, and the tech didn’t need to modify anything. That particular Express van has been on the road for 18 months and about 40,000 miles since. No vibration came back.
Now, I’ll be careful here. My experience is based on one particular part number on one particular van. If you’re buying for a different platform, your results could differ. But it opened the door.
Dorman EGR valve: a little more nuance
The next test was a Dorman EGR valve for a 2012 Ford F-150 with the 3.5L EcoBoost. The code was P0401, and after checking the vacuum lines and the DPFE sensor, the diagnosis came down to a stuck EGR valve.
The OE part was backordered two weeks, which might as well be a month when a customer needs their truck. So I ordered a Dorman EGR valve.
Honestly, the install wasn’t as clean as the drive shaft bearing. The Dorman valve has a slightly different flange, and the original gasket didn’t match. To be fair, the Dorman box included the right gasket, so it wasn’t a showstopper. It just meant an extra ten minutes of work before the tech could bolt it on.
After the job, the code cleared and the truck passed a full drive cycle. It’s been about six months now, and the customer hasn’t come back. From my perspective, that’s the definition of a successful warranty period.
Engine mount: the part that made me re-check my process
The one that really taught me something was a Dorman engine mount. We had a work truck that was developing some serious clunking during hard acceleration. The driver said it felt like the driveline was shifting under load. Diagnosis: a broken hydraulic engine mount.
The OEM mount was on national backorder—not just one distributor, but all three we use. So we went with a Dorman engine mount. It fit, it looked sturdy, and the price was reasonable. For a month, everything was fine.
Then it came back with a bolt that had started backing out of the mounting bracket.
I still kick myself for this. If I’d taken five minutes to check for a technical service bulletin, I’d have known that this specific engine mount requires new torque-to-yield bolts and threadlocker. It wasn’t a problem with the aftermarket part structure. It was an installation spec that we missed. The old bolt had been stretched from the original install, and we reused it.
I called Dorman’s technical support line expecting a fight. Instead, they confirmed the TSB, pointed me to the correct bolt, and sent a replacement kit under warranty. The truck has been fine since.
That whole experience changed how I evaluate parts. A lot of “engine mount” failures in fleet vehicles aren’t the rubber failing—it’s the installer not following the updated torque spec. Dorman’s part wasn’t perfect in every dimension, but their ability to explain what we needed saved us from a much longer diagnostic cycle.
Does fuel injector cleaner work? We tested it
In the middle of all this, my boss asked me, “Does fuel injector cleaner work?” He had two fleet sedans with rough idle complaints, and he wanted to know if a $12 bottle was worth it before authorizing injector replacement.
We ran a small test. Both cars had around 120,000 miles, both had port fuel injection, and both had stored codes for injector balance faults. We poured in a PEA-based cleaner—one of the brands that lists polyetheramine as the active ingredient—and drove both cars through half a tank.
Car number one smoothed out noticeably. Car number two didn’t change at all, because it turned out the injector was physically leaking. The cleaner did what fuel-borne additives can do: it removed carbon and varnish deposits that were causing low flow. It could not fix a worn-out injector body.
According to the Coordinating Research Council’s deposit-control studies (crcao.org), PEA-based cleaners are generally effective at removing existing injector deposits. But the key word is “deposits.” They don’t repair mechanical damage, and they won’t fix a fuel pressure problem.
So my answer to “does fuel injector cleaner work” is: yes, if the problem is carbon, and you’re using a real PEA-based product. No, if you just want to avoid replacing a bad injector.
16x20x2 air filter: the same principle, different part
One tangent that might sound out of place: I’m also the person who orders the 16x20x2 air filters for the shop’s office and waiting room. That’s not a Dorman product—different supplier entirely. But I apply the same rule: check the specification before you buy.
For those filters, the spec is the MERV rating, defined under ASHRAE Standard 52.2 (ashrae.org). We use a MERV 8 for the shop-dust side and a MERV 11 for the customer waiting area because the HVAC system can handle the pressure drop. If I just ordered whatever looked close, I’d be buying somebody’s clearance stock and hoping it fits.
That’s exactly how I approach a Dorman part now. I don’t assume all aftermarket parts are identical. I check the bracket shape, the harness connector, the included gaskets, and the torque spec. The process is the same whether it’s a stamped steel bracket or a furnace filter.
What I’d tell another buyer
After 18 months and roughly 25 Dorman orders, here’s what I’d say:
- Read the recent reviews for the exact part number, not just the brand. One bad review from someone who installed on a different vehicle can steer you wrong.
- Don’t skip the TSB check. It’s not an insult to the aftermarket part—it’s just how modern vehicle specs work.
- Keep the invoice and the box. Dorman replaced the engine mount kit for us without a headache because we had the order details.
- Use the technical support line. They know their own parts. They’re not going to diagnose a completely different failure for you, but they will tell you what torque spec applies to their part.
This worked for us, but our situation is a fleet of workhorse vehicles with high mileage. If you’re buying for a low-mileage show build or a brand-new car under warranty, the calculus is different. I can only speak to the aftermarket side of the parts room.
Would I buy Dorman again? Yes. But I’d buy it with my eyes open—and that’s the biggest thing my purchasing spreadsheet has taught me.