









⚡ Ignite your drive with Bosch’s precision spark—because every millisecond counts!
The Bosch AR5SII3320S spark plug features a premium iridium core and factory-set electrode gap for effortless installation and superior ignition. Engineered with advanced ceramic insulation and a nickel-plated anti-corrosion housing, it offers exceptional durability and wear resistance. Trusted by leading automakers and backed by over a century of Bosch innovation, this spark plug optimizes combustion efficiency, enhances engine performance, and ensures long-lasting reliability tailored to your vehicle’s specifications.






| ASIN | B07FBY8CXM |
| Best Sellers Rank | 45,379 in Automotive ( See Top 100 in Automotive ) 202 in Car Spark Plugs |
| Brand | Bosch |
| Brand Name | Bosch |
| Compatible with Vehicle Type | Vehicle specific |
| Core Material | Iridium |
| Core material | Iridium |
| Customer Reviews | 4.8 out of 5 stars 219 Reviews |
| Gap Size | 0.7 Millimeters |
| Global Trade Identification Number | 04047025956888 |
| Included Components | spark plugs |
| Item Type Name | spark plugs |
| Item Weight | 32 g |
| Manufacturer | Bosch |
| Manufacturer Part Number | 0242145573 |
| Thread Size | M14 x 1.25 mm |
| Thread size | M14 x 1.25 mm |
| Top Material Type | Ceramic |
| Top material type | Ceramic |
| Unit Count | 1.0 count |
| Vehicle service type | Vehicle specific |
J**E
Excellent quality
If you are looking for high quality at lower cost you are at the right place
B**B
Good fit
These Bosh iridium spark plugs fit and work perfectly in my 2014 Ford Fiesta with the Zetec engine.
R**K
Spark plug
Very good plugs
P**S
Perfect
Perfect fit
A**R
Bosh spark plugs
They do just what a bosch spark plug should do
M**R
reasonable price
Was quoted £152 to fit new spark plugs fitted these in 15 mins for £32 no brainer.
S**M
Works like a charm!
This was a replacement for a Ford Focus 2017 and worked like a charm ;-) Saved about a hundred pounds with these sparks :-D
N**N
Top stuff
Always buy bosch. You get what you pay for. Great quality and improved idle on ecoboost engine.
Trustpilot
2 months ago
3 weeks ago