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Bosch (4504) HGR9DQI Platinum IR Fusion Spark Plug, Pack of 1
Bosch (4504) HGR9DQI Platinum IR Fusion Spark Plug, Pack of 1Bosch (4504) HGR9DQI Platinum IR Fusion Spark Plug, Pack of 1
Bosch Product Details - Ratings and reviews for bosch (4504) hgr9dqi platinum ir fusion spark plug, pack of 1.
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$6.14
$2.38
Sales Rank: 17155
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Product Features
Bosch (4504) HGR9DQI Platinum IR Fusion Spark Plug, Pack of 1
- Patented fused iridium and platinum center electrode, sintered into an extended insulator nose, provides exceptional wear resistance and reaches
- 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 set to provide ease of installation - never requires adjustment
- Contains one spark plug
Product Review
Product Description
Boschácombines the best features of their +4 plug with the advantages of iridium.áThe Bosch PlatinumIR Fusionáplug fuses iridium with platinum, combining the superior properties of both materials into a singleáfine wire center electrode.á Additionally this plugáusesásurface air gap technology and 4 yttrium enhanced ground electrodes for both performance and extra long life.áThe fine wireáiridium/platinum center electrode (which isáheat fused into the extended ceramic insulator) reducesáthe voltageánecessary to jump the gap as well as reduces quenching.ááTheá4 ground electrode design not only provides multiple radial spark paths,ábut also the surface air gap designácreates optimal exposure of the air/fuel mixture to the enhanced ignition spark. The combination of an iridium/platinum center electrode and the yttrium -enhancement of the ground electrodes even further extends plug life.áThis plug is designed toágive exceptional performance, reach self cleaning temperature faster for quicker starts, smoother acceleration and increased fuel efficiency.á
Product Details
Bosch (4504) HGR9DQI Platinum IR Fusion Spark Plug, Pack of 1
- Misc.: 0 pages
- Publisher: Bosch
- Label: Bosch
- Studio: Bosch
- Average Customer Review: based on 6 reviews
- Sales Rank in Automotive: #17155
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Customer Reviews
Avg. Customer Review:
Customer Rating: 
Summary: Bosch Platinum IR Fusion = SMOOTH ride but... 2010-08-17
Customer Rating: 
Summary: Does not fit - Amazon website is wrong! 2010-06-22
Comment:
This part (4504) does not fit my 2006 Mercury Mountaineer.
I checked the "fit your vehicle" very carefully and it says this part will fit my vehicle. It doesn't.
I should have gone to the manufacturer's website and checked their compatibility list.
Now I see that my vehicle isn't even listed in their database for spark plugs.
I guess this is one of the hazards of ordering through the web - the Amazon website says "it fits" when it doesn't.
I'm sending them back, but what a PITA.
Now I can't trust Amazon's website so I have to do a bunch of research myself or just buy stuff locally.
"Buyer beware!"
This part (4504) does not fit my 2006 Mercury Mountaineer.
I checked the "fit your vehicle" very carefully and it says this part will fit my vehicle. It doesn't.
I should have gone to the manufacturer's website and checked their compatibility list.
Now I see that my vehicle isn't even listed in their database for spark plugs.
I guess this is one of the hazards of ordering through the web - the Amazon website says "it fits" when it doesn't.
I'm sending them back, but what a PITA.
Now I can't trust Amazon's website so I have to do a bunch of research myself or just buy stuff locally.
"Buyer beware!"
Customer Rating: 
Summary: Awesome plug 2010-06-14
Comment: I gave my 99' Chevy Venture a tune up, with these plugs and a Bosch set of wires. after installing (which a pain on this van b/c I had to take off the intake manifold to get to the other bank) I took it out on the freeway and was astonished. My van could accelerate much faster than before with faster response. Gas mileage was the same, but that was solved my changing the O2 sensors.
Customer Rating:
Summary: Great Spark Plug 2010-04-19
Comment: This is a great spark plug. What I really like - it was $2.50/plug cheaper than I could buy elsewhere.
Customer Rating:
Summary: Good Plugs at Great Price 2010-01-05
Comment: First of all. The Amazon price for this item is 40% of what other big automotive web-retailers charge. Someone is trying to make excess profits.
On installation into my Ford F250 with V10, there is noticeable difference in the throttle response. Engine is more responsive to small throttle changes just above idle, and it seems less throttle is needed to ease away from a stop. There is less burble in the exhaust note. An added plus is that 1st to 2nd gear shift cannot be felt now (from less throttle needed?). Perhaps these plugs are more consistent at firing lean mixtures in newer cars. Note that old plugs removed have gaps still at factory spec.
One caveat - the differences may have resulted with ANY new plugs put in. New plugs with sharp edges at electrodes should start firing at lesser voltages compared with rounded electrodes on well used plugs. The exotic materials used in these plugs may make differences in extended term performance.
On installation into my Ford F250 with V10, there is noticeable difference in the throttle response. Engine is more responsive to small throttle changes just above idle, and it seems less throttle is needed to ease away from a stop. There is less burble in the exhaust note. An added plus is that 1st to 2nd gear shift cannot be felt now (from less throttle needed?). Perhaps these plugs are more consistent at firing lean mixtures in newer cars. Note that old plugs removed have gaps still at factory spec.
One caveat - the differences may have resulted with ANY new plugs put in. New plugs with sharp edges at electrodes should start firing at lesser voltages compared with rounded electrodes on well used plugs. The exotic materials used in these plugs may make differences in extended term performance.
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Bosch - 4504 HGR9DQI Platinum IR Fusion Spark Plug, Pack of 1
Before installation: 19.99 MPG (average)
After installation: 18.54 MPG (average)
where MPG = miles per gallon of 87% octane gasoline.
Overall..happy with the new performance.