Spark plug Bosch or Denso

PartReview Score

Rank #3 in ranking

198

145

264

3.3

Acceleration

3.0

Idle

3.2

Starting

3.0

Owners' choice:

PR Score

Ranking

Votes

Reviews

Average rating

Properties

Car

PartReview Score

Rank #2 in ranking

324

137

184

3.9

Acceleration

3.7

Idle

3.8

Starting

3.8

No data

Reviews

All

Bosch

Denso

Bosch › Spark plug

whiteboardlist 25 Nov 2023, 14:55

Rating 5.0

I have only used Bosch plugs in my cars, and I have not had any issues with them yet.

Pros: no issues yet

Bosch › Spark plug

Fearless-Emergency74 16 Nov 2023, 04:56

Acceleration:

Rating 5.0

Bosch iridiums, these for longevity, copper ones have better spark if your concern is performance

Pros: longevity, better spark

Bosch › Spark plug

argsoftmax 14 Oct 2023, 00:36

Acceleration:

Rating 4.0

Today I installed new spark plugs and the misfiring situation has improved significantly but is not completely gone. If I pull up the RPM too quickly the misfire counter goes up.

Pros: misfiring situation improved

Cons: misfire not completely gone

Denso › Spark plug

benjihume 20 Sep 2023, 01:15

Rating 5.0

Densos. Buy them off rock auto.

Pros: none

Cons: gapping suggested

Vehicle: Volkswagen Golf

Denso › Spark plug

Regular_Empty 19 Sep 2023, 18:23

Rating 5.0

The Denso IHKs are my go to for the last 10k on their tune.

Pros: reliable, good performance

Cons: gapping info mixed

Mileage: 10000 km

Denso › Spark plug

clutchthepearls 19 Sep 2023, 12:07

Starting:

Rating 5.0

Either one, but I found the Denso to be cheaper and easier to get. No issues with them.

Pros: cheaper, easy to get

Cons: none

Vehicle: Volkswagen Golf

Denso › Spark plug

Katmann2005 3 Sep 2023, 04:39

Rating 4.0

You can usually find DENSO IRIDIUM Spark Plugs , which are the OEM Supplier, for about $15 each at any Advance Auto or other major auto parts store.

Pros: easy to find, oem supplier

Denso › Spark plug

2006_A3_2.0T 11 Jan 2013, 15:50

Acceleration:

Rating 3.5

Currently just swapped to Denso's IK20 like 2 months ago. They run pretty good. But now its mid summer over here and the car runs a little bit underpowered at those high temps.

Pros: run pretty good

Cons: underpowered at high temps

Vehicle: Audi A3

Part number: IK20