Reviews of Bosch spark plug

PR Score ?

Based on 264 reviews and 832 votes

832 votes

Average rating ?

3.3

Starting:

3.0

Idle:

3.2

Acceleration:

3.0

145

264 reviews

Description

Bosch

Germany

No.3 in the rating

among 17 manufacturers

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Bosch › Spark plug

maitino 12 Aug 2007, 03:20

Rating 3.0

I am at 20,000 miles with my 07 VW GTI that has several modifications including a chip and I am about to change my spark plugs. I have heard many people say that the colder application spark plugs will work better for my car due to the fact that it is chipped. I went to the dealer and purchased the bosch #101-905-631-B spark plugs which the dealer recommends, but I dont know if these plugs are the colder application? Please give me your guys feedback on what plugs I should buy (Part #'s and website that I can purchase them from). I care about my GTI and want it to run the best it possibly can. I appreciate any feedback you guys can give!

Cons: uncertain if colder application

Vehicle: Volkswagen

Mileage: 20000 km

Part number: 101-905-631-B

Bosch › Spark plug

need_a_VR6 2 Jun 2007, 11:17

Rating 4.5

Acceleration:

Mods: Autotech 262 cams 42 Draft Test Pipe TT 2.5\" exhaust w/Borla Turn 2 Cold Air intake Mk4 Headgasket UR pullies DIY Light Flywheel GIAC cam chip Mk4 plug wires Bosch FR6LDC plugs - reused more times then I can count Motor is a 139k stock block, with a 140+k stock head on it (stock springs), manifolds and tb are all stock.

Pros: strong performance

Mileage: 139000 km

Bosch › Spark plug

Boost_Retard 17 Dec 2006, 18:25

Rating 4.5

Idle:

i have been using the W7DTC plugs and they have been working great for me..my car is always held way up in the rpms..they have never fouled out or caused me any problems..and i get 8 of them for 30 CDN... seat of the pants tells me i like them better than my old platnums..the car idles better with them.. they are worth a try

Pros: working great, idles better

Bosch › Spark plug

84_GLI_coupe 17 Dec 2006, 05:13

Rating 4.0

I've been running W7DTC's for about a year now, with no problems. I haven't done any back-to-back dyno testing to see the difference between them and the usual W7DC's, so I can't comment on any power losses/gains.

Pros: no problems

Cons: no dyno testing

Bosch › Spark plug

lowa2 27 Sep 2006, 00:41

Rating 3.0

Changed spark plugs, wires, cap/rotor with Bosch bits (w7dtc not those crappy +4s)

Cons: crappy +4s

Part number: W7DTC

Bosch › Spark plug

ABF Jeff 10 Jul 2006, 07:12

Rating 4.0

I have never had an issue with the Bosch's

Pros: no issues

Vehicle: Volkswagen

Bosch › Spark plug

racercx2 9 Jul 2006, 20:52

Rating 4.0

Starting:

I personally pick the Bosch Super Plus Copper because they are cheap and last about 20-40k miles...

Pros: affordable, long lasting

Vehicle: Volkswagen

Bosch › Spark plug

reynolds9000 9 Jul 2006, 16:27

Rating 4.0

I'm running bosch platinum single pronges with no problem..

Pros: no problems

Vehicle: Volkswagen Jetta

Bosch › Spark plug

sxracer001 7 Jul 2006, 14:50

Rating 5.0

Idle:
Acceleration:

im running reg bosch silvers (of course the right heat range) on my supercharged setup and they run perfectttt, no misfires or anything, i love bosch plugs

Pros: perfect performance, no misfires

Vehicle: Volkswagen Jetta