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๐Ÿ”ฅ bosch automotive (9621) oe fine wire double iridium spark plug - single: ignite optimal performance and efficiency! logo

๐Ÿ”ฅ Bosch Automotive (9621) OE Fine Wire Double Iridium Spark Plug - Single: Ignite Optimal Performance and Efficiency! Review

3

ยท

Very good

Revainrating 4.5 out of 5ย ย 
Ratingย 
4.3
๐Ÿงฏ Ignition Parts, ๐Ÿ› ๏ธ Replacement Parts

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Details

BrandBosch Automotive
Core MaterialIridium
Top Material TypeNickel

Description of ๐Ÿ”ฅ Bosch Automotive (9621) OE Fine Wire Double Iridium Spark Plug - Single: Ignite Optimal Performance and Efficiency!

Double Iridium firing pin and ground electrode inlay provide 4X longer service life compared to standard copper plugs. 0.6mm fine wire firing pin provides superior ignitability and performance. 360 Degree continuous laser weld fuses corrosion resistant iridium firing pin to base for increased durability. International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.

Reviews

Global ratings 3
  • 5
    2
  • 4
    0
  • 3
    1
  • 2
    0
  • 1
    0

Type of review

Revainrating 3 out of 5

120,000 miles later in a 2009 Toyota Corolla.

After 120,000 miles in a 2009 Toyota Corolla the gas mileage started to drop slightly from 35.5mpg to 32.5-33.5mpg. So I bought them to replace the OEM spark plugs and I was able to get almost the same gas mileage (34-35mpg) when the car was new.

Pros
  • Handy part
Cons
  • Expensive insurance

Revainrating 5 out of 5

Chinese not German March 2020

I read other reviews on this product saying the Chinese are bad and the Germans are great. So I decided to order 4 and see, well I have 4 Chinese so I returned them, didn't try them as I didn't want the potential safety hazard. Ordered maybe late March 2020 in Illinois, USA. In other places there are Germans not sure.

Pros
  • Sturdy construction
Cons
  • No

Revainrating 5 out of 5

Less idle vibration and better acceleration. Old original spark plugs look very unusual.

Replaced DENSO SC20HR11 OEM SPARK PLUGS at 100,000 miles on my 2011 Toyota Corolla (2ZRFE engine). Engine performance is greatly improved. Less idle vibration and better acceleration. Old original spark plugs look badly burned. I'm glad I replaced them before they wore out, even though Toyota's service manual says it should cost $120,000 to service.

Pros
  • Permanent Test Results
Cons
  • Vulgarity