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Bosch Iridium plugs #4447478
07/02/17 02:16 PM
07/02/17 02:16 PM
Joined: Aug 2009
Posts: 3,270
Ohio
Tdbo Offline OP
Tdbo  Offline OP
Joined: Aug 2009
Posts: 3,270
Ohio
The Accord in my signature is getting to the point where it could benefit from some new plugs. The only place where I can find NGK's at a halfway decent price is Rock Auto. However, I can get the Bosch's locally at a decent price. I have never had Bosch plugs before in my life. Anyone have any experience with them in this application?


2012 Honda Accord LX-P 93K
2008 Ford Mustang Pony Package Convertible 17K
2006 Honda Odyssey EX-L 76K
2003 Ford Ranger 3.0 Supercab 110K
Re: Bosch Iridium plugs [Re: Tdbo] #4447487
07/02/17 02:28 PM
07/02/17 02:28 PM
Joined: Apr 2010
Posts: 13,534
Chicago, IL
dparm Offline
dparm  Offline
Joined: Apr 2010
Posts: 13,534
Chicago, IL
Originally Posted By: Tdbo
The Accord in my signature is getting to the point where it could benefit from some new plugs. The only place where I can find NGK's at a halfway decent price is Rock Auto. However, I can get the Bosch's locally at a decent price. I have never had Bosch plugs before in my life. Anyone have any experience with them in this application?



I don't think you'll notice any difference between NGK, Bosch, Denso, or the other big names. Just get the right gap and heat range and you'll be good to go.


2017 Chevrolet Corvette Grand Sport
Re: Bosch Iridium plugs [Re: Tdbo] #4447494
07/02/17 02:39 PM
07/02/17 02:39 PM
Joined: Mar 2013
Posts: 4,755
The Midwest
skyactiv Offline
skyactiv  Offline
Joined: Mar 2013
Posts: 4,755
The Midwest
Are they iridium plugs or "double iridium" plugs? Bosch makes both and the double iridium plugs are longer lasting.


Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual
Re: Bosch Iridium plugs [Re: Tdbo] #4447500
07/02/17 02:44 PM
07/02/17 02:44 PM
Joined: Mar 2013
Posts: 4,755
The Midwest
skyactiv Offline
skyactiv  Offline
Joined: Mar 2013
Posts: 4,755
The Midwest
Make sure you get the correct heat range. The Accord with a 2.4L engine and California emissions uses a hotter plug, #96305, the non Cal model use plug #9619.


Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual
Re: Bosch Iridium plugs [Re: Tdbo] #4447503
07/02/17 02:47 PM
07/02/17 02:47 PM
Joined: Mar 2008
Posts: 6,798
USA
slacktide_bitog Offline
slacktide_bitog  Offline
Joined: Mar 2008
Posts: 6,798
USA
Denso is good too, if that helps smile

Re: Bosch Iridium plugs [Re: skyactiv] #4447504
07/02/17 02:47 PM
07/02/17 02:47 PM
Joined: Aug 2009
Posts: 3,270
Ohio
Tdbo Offline OP
Tdbo  Offline OP
Joined: Aug 2009
Posts: 3,270
Ohio
Originally Posted By: skyactiv
Are they iridium plugs or "double iridium" plugs? Bosch makes both and the double iridium plugs are longer lasting.


All I can get locally is the iridium.


2012 Honda Accord LX-P 93K
2008 Ford Mustang Pony Package Convertible 17K
2006 Honda Odyssey EX-L 76K
2003 Ford Ranger 3.0 Supercab 110K
Re: Bosch Iridium plugs [Re: Tdbo] #4447513
07/02/17 02:59 PM
07/02/17 02:59 PM
Joined: Mar 2012
Posts: 1,276
San Antonio, TX
E150GT Online content
E150GT  Online Content
Joined: Mar 2012
Posts: 1,276
San Antonio, TX
Based on my experience, iridium plugs last a long time. I changed them out on my 2010 Mazda 3 at 90k and they could have been used much longer. I never noticed any difference.


1984 Mercedes-Benz 300SD - 100k
1995 F150 XL 4.9 reg cab 5MT - 251k 5w30
2016 Mazda6 Touring 6MT - 57k 10w30
2006 Buick Lucerne CXL 3.8 31k 5w30
Re: Bosch Iridium plugs [Re: Tdbo] #4447519
07/02/17 03:12 PM
07/02/17 03:12 PM
Joined: Aug 2014
Posts: 1,453
Gulf Coast, MS
3800Series Offline
3800Series  Offline
Joined: Aug 2014
Posts: 1,453
Gulf Coast, MS
I got some cheap NGK plugs a last year off Amazon. I was wondering why they where so cheap and looked around online and found that a few Chinese companies make knock off NGK plugs.

From what I read on a handful of sites and on the NGK site I'm certain mine are real but I would keep that in mind if you find some super cheap plugs.

Re: Bosch Iridium plugs [Re: Tdbo] #4447531
07/02/17 03:30 PM
07/02/17 03:30 PM
Joined: Dec 2016
Posts: 6,226
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 6,226
Waco, TX
I hate all Bosch plugs except for the ones in my Stihl chainsaws. Those I trust, but others I am not impressed with.

NGK or Nippondenso is the only Iridium ones I will fork over my $$$$ for


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Bosch Iridium plugs [Re: Tdbo] #4447569
07/02/17 04:15 PM
07/02/17 04:15 PM
Joined: Oct 2011
Posts: 2,975
Chicago, IL
Brybo86 Offline
Brybo86  Offline
Joined: Oct 2011
Posts: 2,975
Chicago, IL
Try Amazon or eBay, search using the 4 digit NGK part number 5787 not just the longer number ILZKRB11S

Last edited by Brybo86; 07/02/17 04:16 PM.

08 Honda Accord EX-L 2.4L M1 EP 0w20 145k
01 Kymco People 50
95 Lexus LS400 M1 AFE 0w30 193k
95 Yamaha Jog
Re: Bosch Iridium plugs [Re: Tdbo] #4447580
07/02/17 04:27 PM
07/02/17 04:27 PM
Joined: Sep 2009
Posts: 16,002
OH
fdcg27 Offline
fdcg27  Offline
Joined: Sep 2009
Posts: 16,002
OH
There are various online suppliers who specialize in plugs and offer good pricing.
I bought a set of Denso double plats and wires a few years back from sparkplugs.com and they offered very good pricing, better than RA.
If it were me, I'd use either NGKs or Densos over Bosch.
Bear in mind that you also have the option of using old school plugs with the correct reach and heat range.
The only downside is that you'll need to change them more often.


17 Forester 12K MSS 0W-20
12 Accord LX 92K PP 5W-20
09 Forester 95K M1HM 10W-30
01 Focus ZX3 118K PP 5W-20
96 Accord LX 104K T5 10W-30
95 318i
Re: Bosch Iridium plugs [Re: Tdbo] #4447602
07/02/17 04:39 PM
07/02/17 04:39 PM
Joined: Oct 2014
Posts: 11,816
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 11,816
Idaho
I would replace the plugs with the exact same and price wouldn't be a issue.


"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf
Re: Bosch Iridium plugs [Re: Linctex] #4447695
07/02/17 06:45 PM
07/02/17 06:45 PM
Joined: Jan 2017
Posts: 1,139
USA
ArcticDriver Offline
ArcticDriver  Offline
Joined: Jan 2017
Posts: 1,139
USA
Originally Posted By: Linctex
I hate all Bosch plugs except for the ones in my Stihl chainsaws. Those I trust, but others I am not impressed with.

NGK or Nippondenso is the only Iridium ones I will fork over my $$$$ for


I agree.

I used to say use Bosch in my VAG vehicles and NGK in my Japanese but I start having trouble with Bosch so switched to NGK in my VW's and AUDI's.
Other car owners from my European forums were making the same conclusions.

As for Iridium...I did have an experience where the center "wire" electrode had burned down to the insulator tip on 3 of the 4 Iridium plugs when I removed them one year after installation. I personally prefer the less expensive old school design and I change them more frequently...but then I like to turn a wrench on my vehicles and keep an eye on what is happening.

Out of curiousity, do any of you check the plug gap on the old plugs you are removing? Do you often find the gap has increased?

Last edited by ArcticDriver; 07/02/17 06:47 PM.

Multiple Diesel and Gasoline vehicles
Re: Bosch Iridium plugs [Re: Tdbo] #4447738
07/02/17 07:29 PM
07/02/17 07:29 PM
Joined: Aug 2004
Posts: 4,629
Katy, Republic of Texas
blupupher Offline
blupupher  Offline
Joined: Aug 2004
Posts: 4,629
Katy, Republic of Texas
For Asian vehicles, NGK or Denso is all I would use.

I have used Bosch Fine Wire in GM vehicles with good results.


1994 Honda VT1100: Peak 15w-40/PSL/2500 mile OCI
2002 Ford F150: GTX HM 5w-20/EcoGard Syn/1yr OCI
2012 Scion xB: QSUD 0w-20/CQ Blue/5k OCI

Re: Bosch Iridium plugs [Re: blupupher] #4447749
07/02/17 07:36 PM
07/02/17 07:36 PM
Joined: Sep 2015
Posts: 5,839
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline
Joined: Sep 2015
Posts: 5,839
Kalifornia Kollective
Originally Posted By: blupupher


I have used Bosch Fine Wire in GM vehicles with good results.


+1 smile


Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
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