Denso VS. Toyota Differences?

Greg Owner Wilmington, Delaware Posted   Latest   Edited  

I'm trying to wrap my head around parts. Particularly Denso vs Toyota. Sometimes there are heated discussion amongst us here at the shop around purchasing Toyota or Denso. It usually is centered on ignition or emission related parts. Generically, I'm all for an OE solution for those aforementioned situations. However, I can purchase the Denso equivalent directly from my preferred aftermarket supplier which saves time, money, offer a longer warranty and I can put a repair price to the client that is more favorable to their pocket. And when the OE OWNS the Supplier, it makes my argument a bit stronger. 

So, is there a quality reason that I should consider between these two selections. 

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Michael Owner/Technician
Montague, New Jersey
Michael Default
 

Honestly, I don't see a difference. I have used Denso Alternators, Starters, TPMS sensors, AFR sensors, MAF sensors etc. All have worked fine with a zero comeback rate etc. I have heard here and there that OEM is better but I do have 27 years experience working at Toyota dealers and I can't tell. Use your own judgement.

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Greg Owner
Wilmington, Delaware
Greg Default
 

Thank you Mike. It's a point of contention that leads to stand offs sometimes. I have never had an issue with Denso myself. And even though I'm not in the bay anymore, I do have influence on what part and where it's purchased. I respect my master tech's choices and guidance, but There seems to be this bias against purchasing such as Denso from my local supplier rather than a dealer with the…

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Zachary Mobile Technician
Austin, Texas
Zachary Default
 

I'd have to agree with both of you. I've used Denso parts from aftermarket suppliers for years on Toyotas (as well as many other manufacturers) and can't really think of any issues I've encountered. I've heard it said that when a company makes the part for the OEM it's to a different standard than the aftermarket version. I'm not so sure I buy that though, especially with a company like Denso…

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Marty Owner/Technician
Newark, Delaware
Marty Default
 

Greg we've all been in this business long enough to know that the manufactures out source most of their own parts. They rebox and there it is OEM parts. Every time this topic comes up it reminds me of the movie Armageddon, when their just getting ready to take off to save the planet. Strapped in the rocket made of millions of parts supplied by the lowest bidder. Lol I use what I have learned to…

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Raymond Mechanic
Midland, Michigan
Raymond Default
 

I have to agree with the majority. Knowing that Denso only produces top quality parts they are always my go to supplier. If this discussion was OE vs, AZ we would all have another opinion.

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Geoff Diagnostician
Lahaina, Hawaii
Geoff Default
 

AZ sells Denso; autozone​.​com/ignition-tune…​.​ds

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Raymond Mechanic
Midland, Michigan
Raymond Default
 

I was referring to the "Don't Last or Valu Crap" parts. I do a lot of business with Zone but am always careful with which parts I buy from them.

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Greg Owner
Wilmington, Delaware
Greg Default
 

You are correct, Marty. I'm just a little fatigued by staff that can be more than just a bit zealous in their demand for OE Branded parts. Hey, hope you've been well. Haven't been in your neck of the woods lately.

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Marty Owner/Technician
Newark, Delaware
Marty Default
 

All is well Greg, just became a Grand father for the first time 8# baby boy, thanks for asking. Had a discussion with Josh this morning and we have had some issues with same brand after market over OE in the Denso line. Mostly o2's and AFR sensors just not working as advertised! We have found this especially on Toyota products. Let me know when the next DASP meeting is, I haven't received any…

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Maynard Technician
Elmira, Ontario
Maynard Default
 

Greg, I used to feel the same sort of dilemma, then one day someone showed me this, and since then I use that as final authority.... must be differences. I still work in the bays, I prefer Toyota stamped on wherever possible, when I work on ford I like to have Ford stamped on it. If you read through the article and imagine for a minute, having installed a condenser, and client comes back on a…

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Greg Owner
Wilmington, Delaware
Greg Default
 

Thank you Maynard for the insight. Very interesting article. But, with a Tier 1 supplier making a quality, OES part, I feel confident using them. Especially if the vehicle is a bit older. We've used Denso alternators, radiators, starters, etc., with no issues. FFF is all there too. This particular incident happened to be for a MAF and a client looking to save a little where ever they could.

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Anthony Technical Support Specialist
Kirkwood, Pennsylvania
Anthony Default
 

Hi Maynard: Interesting article, thanks for sharing. I found the link for the glass article below it interesting also. Guido

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Greg Owner
Wilmington, Delaware
Greg Default
 

And then there's this one as well. repairerdrivennews​.​com…oes…

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Anthony Technical Support Specialist
Kirkwood, Pennsylvania
Anthony Default
   

Hi Greg: While different than the question posed, it does address an underlying concern you mentioned trying to address. In this …e, the OEM is standing behind the product. Without getting too far into the weeds, what does that mean exactly? I don't know. What I believe you were alluding to in your post though, were situations like: installing an aftermarket ignition coil on a Chrysler…

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Greg Owner
Wilmington, Delaware
Greg Default
 

Whew..... Man, you can pack on the verbiage to reach a point. :) There's a matrix that I have in my head at all times because I'm the one that's ultimately responsible for delivering a properly running vehicle back to the client. It goes like this: Age of vehicle, type of repair, talent to make repair, type/quality of part, where I source the part, price of part, speed of service, profit…

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Jesse Owner
Roanoke, Virginia
Jesse Default
 

On some sensors, MAF etc., there is a calibration difference.

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Jonathan Technician
Tempe, Arizona
Jonathan Default
 

The correct answer of course is, "It Depends". What Denso sells though their aftermarket channels is not always exactly the same as the Genuine Toyota part, same for most all tier 1 suppliers. You have to learn to pick and choose. Given the choice and the inability to discern the difference visually in many cases I personally prefer to err on the side of Genuine Toyota replacement parts.

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Pat Technician
Carson, California
Pat Default
   

The only way that I've been able to be sure that a non-toyota part is really any OEM part is if I see a grinder mark or epoxy over where the part used to say "TOYOTA"...like I used to see on water pumps and timing belt tensioner rams. I've been seeing some components lately in Aisin timing belt kits that have "AISIN" paint stamped on a generic looking part instead of the AISIN logo cast into the…

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Michael Owner/Technician
Montague, New Jersey
Michael Default
 

Aisin warner does supply some timing belt kits. I have compared them to the oem parts and to other brands. They look identical to oem while other brands do not. However, I have had a brand change from suppliers where it came in the same box but wasn't the same part. I no longer use that brand. I don't generally use advics pads. I do use Akebono and I have never had an issue with their parts. The…

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Jamey Owner/Technician
Ventura, California
Jamey Default
 

How timely! Today I have a customer with a Tundra, we installed an Asian Timing belt/water pump kit as well a Tezuka center support bearing Back in September 2019. (Both of those parts are “OE Supplier) 4000 miles ago. The Asian pump is leaking and the bearing is making noise! RATS! Tomorrow I will pay the labor of my technician to install both!

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Michael Owner/Technician
Montague, New Jersey
Michael Default
 

Interesting. I have used them on Toyota and Honda without any issues for many years now. It certainly can happen as your post shows.

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Jamey Owner/Technician
Ventura, California
Jamey Default
 

It’s not common to have them fail. That’s why I buy them, but even a blind squirrel finds a nut every now and then!

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Michael Owner/Technician
Montague, New Jersey
Michael Default
 

True.

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Michael Owner/Technician
Cartersville, Georgia
Michael Default
 

Hi Greg, I can't comment on the differences between OES Denso and the aftermarket but I can tell you Denso is easily the most reliable parts I buy. If a Denso part is available for a job I will buy that part because it rarely comes back. There is so much misinformation regarding aftermarket parts that I don't know who to believe. I have trusted brands I try to use that puts me in the best…

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Jacob Diagnostician
Sandy, Utah
Jacob Default
 

Hey Greg, We have run into similar situations over the years of techs not wanting to install a certain brand of part. I have found it usually comes down to one of two reasons: 1, they had a single bad experience with the brand or someone told them about a problem they had. 2, techs that are new to our shop have been burned by previous employers not paying for warranty repairs or paying a lower…

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Michael Owner/Technician
Montague, New Jersey
Michael Default
 

In general this is what I do. Since I specify what parts are being used, the tech gets paid if the part fails. If the tech screwed up and either ordered a part which didn't fix it due to a misdiagnosis or broke the part during the install, they get paid and warned that this isn't proper procedure. We only use quality on everything we do. I rarely have part failure issues.

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Marlin Technician
Estacada, Oregon
Marlin Default
   

Denso had been very reliable as a brand for many years, but is not now. They are now trying to gain market share by selling lower-quality parts, often made by other suppliers; this is especially common for applications where Denso is not an OE supplier, in order to have a larger market, and in high-volume categories, to have lower prices. This has resulted in the Denso name on packaging of some…

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Rudy Technician
Montebello, California
Rudy Default
 

As the lead tech in the shop,my word carries a lot of weight,but I am also a realist and use my better judgment and experience. Ive not had any problems with Denso for me to not consider it as a replacement part. Unless your tech has valid, underlying reasons for not wanting to use Denso parts,Id gently remind him that the final say is yours(I know, not really something good shop owners like to…

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Michael Diagnostician
Vineland, New Jersey
Michael Default
 

Hi Greg,I have installed hundreds of Denso and NTK, AFR sensors on Honda ,Toyota Never had a bad one​.​Some even had Toyota logo ground off of them​.​Sometimes they even cost less at dealer.A lot quicker to get AM​.​Have a great day

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