14mm socket is standard - 10mm and 12mm are less common, found in only some motorcycles. What is more important is the thread reach - too little or too much are both bad. Amazon has a nice system of selecting the vehicle and showing which plugs fit that vehicle. Bosch has a similar system at BoschAutoParts.com. Remember to NEVER gap-adjust iridium plugs.

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BOSCH 9603 OE Fine Wire Double Iridium Spark Plug - Single

BOSCH 9603 OE Fine Wire Double Iridium Spark Plug - Single

Q: what is the gap preset on these spark plugs in inches?

Most Bosch Spark Plugs are factory pre-gapped for popular vehicle applications. The gap measurements are indicated either on the box, or by the part number located on the spark plug shell. X suffix = .044" Y suffix = .060" Z suffix = .080". However, it must be noted that wire-tip or needle-tip plugs can afford to have larger gaps as the spark occurs at a lower voltage if one end is pointed, leading to a wider spark and better combustion of the fuel-air mixture. Gaps should never be adjusted on the OE-Fine Wire-tipped plugs - should never be gapped by the installer. Attempts to do so might damage the plug/the delicate tip. What is more important is all the plugs should have equal gaps, or there might be engine knocking and vibrations.

Q: Will this work for Lawnmower ?

Only if your lawn mower has a 2.2L 4 cylinder engine.

Q: Will this work for honda crv 2016?

Bosch 9603 does not fit the 2016 Honda CR-V. The correct Bosch spark plug for this application is 96310. Thank you for your question.

Product ID: 1252984

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Details

Brand
Bosch
Core Material
Iridium
Thread Size
1.25mm
Top Material Type
Nickel
Vehicle Service Type
Car

⏳4X longer lifespan

⚡24% less voltage needed

🔩Nickel-plated corrosion resistance

Frequently Bought Together

BOSCH 9603 OE Fine Wire Double Iridium Spark Plug - Single

BOSCH 9603 OE Fine Wire Double Iridium Spark Plug - Pack of 4

FEL-PRO VS 50530 R Engine Valve Cover Gasket Set for Toyota Camry

Description

⚡ Spark your drive with Bosch Double Iridium – where power meets precision!

BUILT TO LAST - Double iridium electrodes deliver 4X the lifespan of standard copper plugs—upgrade your maintenance game
OE PERFECT FIT - Engineered to meet or exceed manufacturer specs, including Gasoline Direct Injection compatibility
IGNITE WITH PRECISION - 360° laser-welded ultra-fine iridium wire for unmatched ignitability and engine efficiency
EFFORTLESS INSTALLATION - Pre-gapped and nickel-plated threads mean no anti-seize needed—get back on the road faster
TRUSTED BY PERFORMANCE ENTHUSIASTS - Compatible with a wide range of luxury and performance vehicles—join the elite drivers who demand Bosch

Bosch 9603 OE Fine Wire Double Iridium Spark Plug features dual iridium electrodes and a 360-degree laser-welded ultra-fine wire design that reduces voltage requirements by up to 24% and lasts 4 times longer than standard copper plugs. With nickel-plated rolled threads for corrosion resistance and pre-gapped factory settings, it ensures easy installation and optimal performance. Designed for modern gasoline engines including GDI, it fits a broad range of premium vehicles, delivering OE-level reliability and enhanced engine efficiency.

Specifications

Brand	Bosch
Core Material	Iridium
Thread Size	1.25mm
Top Material Type	Nickel
Vehicle Service Type	Car
Global Trade Identification Number	00028851010375
Automotive Fit Type	Vehicle Specific Fit
UPC	028851010375
OEM Part Number	9603
Manufacturer	Bosch Automotive
Model	Spark Plug
Item Weight	0.8 ounces
Product Dimensions	4 x 7 x 9 inches
Item model number	9603_1
Exterior	Machined
Manufacturer Part Number	9603
Position	Front, Rear

Have a Question? See What Others Asked

what is the gap preset on these spark plugs in inches?

Will this work for Lawnmower ?

uses 14MM socket?

Will this work for honda crv 2016?

Reviews

S**N

Solid, reliable park plugs

I got these for my 2002 GS430 and boy do they help get all the power out of my engine. I have an exhaust leak and trans leak that leads to a laggy bogged down performance, but by swapping out with these plugs yearly I can keep the power more responsive. I tried other plugs, but these seem to do the best for me in my case. Installation was straight forward and these tightened in place great with a little bit of antiseize.

4.03.2024

L**A

Excelente

Justo lo que pedi

13.08.2025

L**.

Great Product

Purchased this product for my 2004 Toyota Tundra and so far it is doing the job as intended. My truck now accelerate as it should without any hesitation. It arrived well packaged and gapped. A great replacement at a great price!

15.09.2022

F**N

Great

Thank You

13.04.2025

J**H

good item

i bought 4 sparks for my friends，because he is not the amazon prime membership，he said it is well for his Camry and more powerfull,just a little expensive. Last year i bought 6 sparks and just costed 23

4.02.2019

T**M

Great Fit for Lexus RX330 2004

Fast delivery and perfect product fits well on my lexus RX 330 model 2004 , i recommend it to Lexus owners as it lasts for a long time.

15.08.2024

S**I

As expected

Exactly what you think they are. Work fine with no issues.

19.01.2024

A**R

Worth the money

My 2004 Toyota Highlander runs smoother and is a good pick-up. So far so good. Best spark plugs ever bought.

30.08.2023

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