Bosch (4503) FGR7DQI Platinum IR Fusion Spark Plug

Bosch (4503) FGR7DQI Platinum of 1)

Bosch (4503) FGR7DQI Platinum IR Fusion Spark Plug, (Pack of 1)

by Bosch

  • Fused iridium and platinum center electrode, sintered into an extended insulator nose results in reaching self-cleaning temperature only seconds after starting and provides exceptional wear resistance
  • Revolutionary surface air gap firing technology featuring Bosch's unique four ground electrode design delivers the most powerful spark for the most efficient combustion and optimum horsepower without increasing the voltage requirement
  • Four yttrium enhanced ground electrodes resist spark plug wear and oxidation for exceptional performance life
  • Factory pre-set gap allows for easy installation that never requires adjustment
  • Fusion's voltage requirement increases less over time versus other iridium plugs for longer reliable performance of the vehicle's ignition system
  • Price: $8.37 Save: 10%
  • $9.33 List Price
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  1. Brand: Bosch
  2. Dimensions: 3.38 x 0.85 x 1 inches
  3. Shipping Weight: 0.05 pounds
  4. Item ID: upc:028851010474
  5. Item ID: ean:0028851010474
If youre looking for the very latest in spark plug technology, look no further than Bosch Platinum Ir Fusion. Fusion features a patented, fused iridium and platinum center electrode, combined with exclusive surface air gap firing technology to produce a longer, more powerful spark. Its four yttrium-enhanced ground electrode design outperforms OE iridium plugs by significantly reducing gap wear. This means less stress on the ignition system for quicker starts, more efficient fuel combustion, and a longer performance life. In addition, Fusions voltage requirement increases less over time versus other iridium plugs for longer reliable performance of the vehicles ignition system.
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Bosch (4503) FGR7DQI Platinum IR Fusion Spark Plug Reviews

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 (60 customer reviews)

Excellent plugs, possibly somewhat electrically different, September 27, 2011
A. Hsiao (New York, New York)
I put these in a my Volvo V70 XC as part of a tune-up and found them to be much, much better than the OEM plugs with 30k miles on them. Smoother idling, clearly better response/power from the engine throughout the RPM range, and with better gas mileage.

Just a few days after putting them in, however, I lost an ignition coil. After reading a bit on and elsewhere, I got conservative and worried about whether or not the change in plugs was responsible for the coil loss--they are old coils and some have suggested that these plugs have different electrical characteristics from more traditionally designed plugs.

I replaced the coil and then replaced these plugs with Autolite Double Platinum plugs, which come highly recommended from a couple of mechanic friends for durability and compatibility. Gapped the Autolites and installed them and felt, in comparison, as though I was driving a brick around the city. Car took more cranks to start, and the mileage monitor.

Great plugs, November 8, 2009
ZZM "garro" (Chicago, IL USA)
Excellent spark plugs, I noticed the difference of the engine noise right away, especially when driving above 45Mph , the engine runs much smoother and quieter.It appears that 4 prongs does make a big difference over 1 prong, the car accelerates smoother and faster as well.It cost five times more than a cheap 99cent plug (after rebate) but its worth it.
Highly recommended.

Spark plugs are hot, October 4, 2007
G. Varga
I bought a set of six for my three series and they are exactly as represented. Top of the line plugs from Bosch. Installed and car runs perfectly.
I'll tell you more after the next 100,000 miles with them!

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