Reviews of Denso parts For Business

Average Rating ? The manufacturer's average rating is calculated based on ratings of all its spare parts. It determines the place in the manufacturer ranking
4.0
Manufacturer Ranking
#73
635
Spare Parts
17
Country
Japan
Spare Parts
Denso Engine radiator

my 2005 4Runner Limited 4WD V8 that I bought one year ago with only 55k miles on it (well maintained time capsule), was just fine. Zero leaks from the radiator or anything. At 65k miles I went ahead and replaced the radiator with a Denso unit.

I figured going from a life in SoCal to southeast Texas summers would tax the radiator. Plus, 55k miles in 20 years, and now I’ll put about 20k miles a year on it, would likely make the original radiator go pop at the most inconvenient time, surely.

Pros: zero leaks
Mileage: 65000 km
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Denso Starter motor
Xiaomi12
  • Cranking:
Rating 5.0

I have a 2006 corolla, had same problem, just bought a new denso starter and no more troubles. Very easy to put the new one on actually, remove the fan on the front first for more space

Pros: easy to put on
Vehicle: Toyota Corolla
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Denso Starter motor
Billant
  • Cranking:
Rating 5.0

Mine did this, it was the contacts internally in the starter motor, they wear down and make poor contact, I replaced it with a denso branded one, it never missed a beat

Pros: never missed a beat
Cons: poor contact
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Denso Alternator

I have a 2005 XLS and upgraded to the 130a one, no issues at all. I bought a Denso (oem) one on rockauto for $170, sent my old one and got $40 back. The Toyota one (also denso) was like $450. The 130a was actually cheaper than the 100a too. Did it myself in about 3 hours

Pros: no issues, cheaper than OEM
Vehicle: Toyota
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Denso Spark plug

Bro ABSOLUTELY do the spark plugs yourself. I bought oem Denso spark plugs from Napa Auto for about $180. Then all you need is a spark plug socket w/ swivel head, 10mm socket, 12mm, a couple extensions, needle nose pliers, dielectric grease, and a pick to make life easier.

Pros: save money, easy job
Cons: time consuming for beginner
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Denso Alternator

As someone pointed out, don't expect the 150 dollar alternator to last that long. I threw on my 4runner a few months back because that's all that was in stock locally and I'm gonna have to replace it again, it's already whining. I'd definitely spend $350 or whatever it is on a denso unit

Pros: Denso unit is better
Cons: cheap alternator failed
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Owner reviews of Denso products

The Denso brand is registered in Japan. Official website is not specified yet.

In March 2026, PartReview recorded 635 reviews across 17 parts by Denso. Average rating — 4.0 out of 5.

Denso is in the PartReview manufacturers ranking, currently at position 73. Over the last 30 days it dropped by 40 points.

Popular Denso parts

The most popular Denso products on PartReview:

  1. Alternator Denso - 218 reviews. PR Score — 81, average rating — 4.
  2. Spark plug Denso - 184 reviews. PR Score — 78, average rating — 3.9.
  3. Starter motor Denso - 60 reviews. PR Score — 85, average rating — 4.1.
  4. Ignition coil Denso - 44 reviews. PR Score — 93, average rating — 4.5.
  5. Engine radiator Denso - 39 reviews. PR Score — 82, average rating — 4.2.

Most owner reviews about Denso parts are collected on these pages.

Top-rated Denso parts

Denso achieved top positions in these PartReview part rankings:

  1. Best alternator — ranked 1 among 18 manufacturers. Received 2584 votes.
  2. Best starter motor — ranked 1 among 10 manufacturers. Received 1019 votes.
  3. Best AC compressor — ranked 1 among 4 manufacturers. Received 225 votes.
  4. Best spark plug — ranked 2 among 17 manufacturers. Received 5196 votes.
  5. Best ignition coil — ranked 2 among 13 manufacturers. Received 1155 votes.

Comparisons of Denso parts

The most interesting comparisons of Denso with other manufacturers help you see which is better:

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