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⚡ Ignite your drive with Bosch’s 4X life double iridium spark plugs!
Bosch 9621 OE Fine Wire Double Iridium Spark Plugs combine advanced laser-welded ultra-fine iridium electrodes with factory pre-gapping and corrosion-resistant nickel-plated threads. Engineered for modern gasoline and GDI engines, they reduce voltage requirements by 24%, last 4 times longer than standard plugs, and ensure OEM-level fit and performance—delivering reliable, efficient ignition and smoother engine operation.
| ASIN | B0762GB2TM |
| Automotive Fit Type | Vehicle Specific Fit |
| Best Sellers Rank | #15,910 in Automotive ( See Top 100 in Automotive ) #78 in Automotive Replacement Spark Plugs |
| Brand | Bosch |
| Brand Name | Bosch |
| Compatible with Vehicle Type | Car, SUV, Truck |
| Core Material | Iridium |
| Customer Reviews | 4.6 out of 5 stars 640 Reviews |
| Gap Size | 0.04 inches |
| Global Trade Identification Number | 00028851034265 |
| Included Components | Spark Plugs |
| Item Type Name | Spark Plugs |
| Manufacturer | Bosch Automotive |
| Manufacturer Part Number | 9621 |
| Manufacturer Warranty Description | Limited |
| Model Number | 9621 |
| Number of Items | 1 |
| Thread Size | 12mm |
| Top Material Type | Iridium |
| UPC | 028851034265 |
| Unit Count | 4 Count |
| Vehicle Service Type | Car, SUV, Truck |
R**R
Near OEM quality at 1/4 cost
Near OEM performance at 25% of the cost! Bosch Quality replaced NGKs/Toyota OEMs. Great value and now the engine is running smoothly! I have seen a slight improvement in my mpg @1mpg overall in mixed driving conditions.
M**R
Mejor opción que las originales Mazda
Excelentes como siempre Bosch
S**H
Quality Spark plugs
Installed in my Mazda 6 and now it's running much better
M**.
Preset gap, easily replaced
Looked better than the OEM they replaced on my CX-5
L**O
Buy them.
Easy to install, run good.
C**Y
Faulty plug? Otherwise great set
Definitely better than the old plugs that probably had 80k miles on them. The one star off is because I had a misfire after installing. Not sure if I damaged the plug or what, but a reinstall didn't fix the misfire. In my genius, I rushed to try to gap it and ended up breaking the iridium tip. Put the old plug into cylinder 3 (where the misfire was) and it was fine. Gonna have to get a new single tomorrow at my local shop, but a bit frustrating to get a misfire after install.
D**S
Excelente producto y calidad
Excelente producto, llego a tiempo
S**H
I'm so happy!!
My car runs like it's brand new again. So much more power!!!
D**H
Didn’t have to gap to install
Fit in my 2015 Mazda 3 with correct gaps right out of the box. No issues so far
A**D
التيما 2021 تركب
ناسبت سيارتي التيما 2021
V**S
Les ceux d'origine chez le concessionnaire sont 64$ chaque
Même qualité que ceux d'origine et le prix beaucoup moins élevé que ceux d'origine
J**R
Excelentes Bujías
Bujías 10/10 muy recomendadas
I**Y
Top quality spark plugs.
Perfect fit and top performance
Trustpilot
3 weeks ago
1 week ago