Bosch (4503) Platinum IR Fusion FGR7DQI Z? Spark plug Pack 1
2010 September 18
Bosch (4503) Platinum IR Fusion FGR7DQI Z? Spark plug Pack 1
Bosch Platinum IR Fusion Z? spark plug has an iridium & platinum center electrode with molten surface? surface air gap firing optimum engine performance, delivers better than OE iridium plugs. Rating: 
List Price: $ 52.15 Price: $ 2.56
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Review by G. Varga for Bosch (4503) FGR7DQI Platinum IR Fusion Spark Plug, Pack of 1
Rating:
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!
Review by T. Guggisberg for Bosch (4503) FGR7DQI Platinum IR Fusion Spark Plug, Pack of 1
Rating:
I tried these plugs on my 2004 Honda Accord to see if they make a difference. The car only has 50k miles, well below the factory recommended change interval for the spark plugs. My average mileage has increased from about 26 to 28.5 MPG. They’ll pay for themselves quickly with today’s gas prices.
Review by ZZM for Bosch (4503) FGR7DQI Platinum IR Fusion Spark Plug, Pack of 1
Rating:
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.
Review by Robert D. Wolfe for Bosch (4503) FGR7DQI Platinum IR Fusion Spark Plug, Pack of 1
Rating:
If your looking for Iridium for the platinum plug price, this is the plug for you. My Audi performs better and gets approximatley 1 mpg better fuel mileage than with inferior single ground bar Iridium Plugs on the market. Thumbs up to Bosch for this quality product.
Review by J. Abshire for Bosch (4503) FGR7DQI Platinum IR Fusion Spark Plug, Pack of 1
Rating:
Have about 5K on these with no problem, did notice a slight idle difference for the better but not much. Overall pretty impressed for the price.