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DENSO Iridium Long-Life Spark Plug: OE Performance, ZTJ16VR10
1 year warranty
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Product Information
Product Details
Part No. 3539
Warranty Details (1 Year Warranty)
The Iridium Long-Life Spark Plug is engineered to meet the highest OE standards for performance, durability, and emissions, making it a reliable choice for your vehicle. Featuring DENSO's patented Iridium Alloy with a fine wire center electrode, this spark plug delivers sustained spark performance for over 100,000 miles, lasting up to three times longer than conventional plugs. Its platinum ground electrode ensures extended life, while the 360-degree laser welding process guarantees a robust bond and structural strength. Designed to endure extreme temperatures exceeding 4,000 degrees Fahrenheit, it is ideal for high-performance ignition systems and special fuel setups. With a tapered seat type and iridium center electrode tip material, this spark plug offers exceptional durability and efficiency, providing long-lasting value for your vehicle's ignition system.
Product Features:
Product Features:
- Latest OE technology with DENSO's patented Iridium Alloy (90 percent Ir) and fine wire center electrode
- Platinum ground electrode for extended life
- DENSO Patented 360 degree laser welding process: Ensuring exceptional quality bond and structural strength with the Iridium Center Electrode
- Sustained spark performance over 100,000 miles
- Lasts up to three times as long as conventional plugs
- Endures extreme temperatures greater than 4,000 degrees F associated with high-performance ignition and special fuel systems
- Iridium Long Life
Specifications
Center Electrode Core Material:
Copper
Center Electrode Tip Material:
Iridium
Ground Configuration:
Standard
Ground Electrode Core Material:
Nickel
Ground Electrode Quantity:
1
Ground Electrode Tip Design:
Platinum Chip
Hex Size:
16.0 mm
Manufacturer Heat Range:
16
Pre-Gap Size:
1.0 mm
Reach:
25.00 mm
Resistance:
5000.0
Seat Type:
Tapered
Thread Diameter:
14.00 mm
4.81 out of 5
757 Customer Reviews
93% of respondents would recommend this to a friend
Ratings Distribution
5 Stars
683
4 Stars
41
3 Stars
13
2 Stars
2
1 Star
18
Pros
48
Improves Engine Efficiency
42
Easy To Install
39
Durable
39
Increases Power
9
Lightweight
Cons
8
none
6
No Improvement In Performance
3
Pricey / Poor Value
1
Difficult To Install
1
Not "exact Fit"
Best Uses
61
Everyday Driving
47
Replacement
25
Performance Driving
9
Restoration
6
Racing
Car & Truck
8
Casual Driver
3
Auto Enthusiast
2
Truck Enthusiast
1
Competitive Driver
1
Shadetree Mechanic
Describe Yourself
33
Casual Driver
28
Auto Enthusiast
17
Mechanic
6
Truck Enthusiast
4
Competitive Driver
Most Liked Positive Review
Incorrect plug
I entered my car 2000 Infiniti I30 with 3.0 V6 to look for spark plugs. A spark plug that is incorrect for my car is shown on your site stating its correct for this car.
It is Denso SK16PR-L11. The correct plug shown on Denso's site is Denso SK20PR-L11.
The difference is the 16 in the number witch is the heat range. A 16 installed could in fact due major internal damage to my engine including burning a hole in the piston if the cars driven on a very long road trip and since they can be installed for yrs and up to 100,000 miles these days it eventually will take its toll on an engine.
It is a hot plug and not the original heat range plug for this car. Please visit Denso's site and update your plug info.
Thank you
Most Liked Negative Review
Never Buy These Plugs
I purchased 8 of these a little over a year ago for my Honda Insight and they have been a nightmare. The engine started missing after awhile so I checked the "new" plugs and found that cylinder #3 plug anode was missing! OMG,that means it went through the engine. I replaced it and ordered new Honda plugs. Before I could put the new Honda plugs in Two more of the DENSO plugs failed the same way, anode fell off in the engine. Bad news for me is that after replacing the defective plugs the engine is still missing on cylinder #2, so this means that something else is damaged. See the picture.
Reviewed by 757 Customers
Great choice for my 2004 5.3l Z71 Tahoe "flex"
Put these in to replace the ac delco pro dbl plats. I researched for days to find a good plug for my truck. Thought the delco's were the way to go. Was I ever wrong truck was like it was dying. Misses, misfires, code p0300. Then saw these with the GM in description. Ordered on line and picked up in store. Had them in a couple hours and truck was cured. Runs awesome now like it should. It just didn't like the plats. I even saw some kind of tsb from gm switching to these plugs. I bit. Stick with iridium and make your ride happy. Thanks to all the counter staff at AAP. They were very nice and fast. Plugs were waiting for me when I got to the store. I'll report back after a few miles if plugs give any problems.
Bottom Line Yes, I would recommend to a friend
Incorrect plug
I entered my car 2000 Infiniti I30 with 3.0 V6 to look for spark plugs. A spark plug that is incorrect for my car is shown on your site stating its correct for this car.
It is Denso SK16PR-L11. The correct plug shown on Denso's site is Denso SK20PR-L11.
The difference is the 16 in the number witch is the heat range. A 16 installed could in fact due major internal damage to my engine including burning a hole in the piston if the cars driven on a very long road trip and since they can be installed for yrs and up to 100,000 miles these days it eventually will take its toll on an engine.
It is a hot plug and not the original heat range plug for this car. Please visit Denso's site and update your plug info.
Thank you
Perfect fit for 350z
Verified Buyer -
Perfect fitment, and installed without a hitch. I have the piece of mind knowing I used the OEM spark plugs as replacements, and a qualitypart that should last a long time.
Piece of advice for you other 07 - 08 350z owners. Don't bother removing the intake manifold. The plugs can be reached by removing you intakes and throttle bodies. Once I had those out of the way, installation was a breeze. Picked up some dielectric grease and anti seize of course, and no issues.
Bottom Line Yes, I would recommend to a friend
Identical to OEM
Staff Reviewer -
Denso is the OEM manufacturer for TOYOTA / LEXUS /SCION. These ones are identical to the ones that come in the 2nd generation Prius (2004-2009). If you plan on replacing at the recommended intervals of 100k miles these are perfect. They are a bargain here compared to what the dealer charges for the exact same plug. If you are replacing with the platinums or double platinums to save a few dollars now you will need to change around 30-40k they don't hold up as well with the hybrid engine shutting on and off. Don't forget the dielectric grease for the boots and more importantly the anti sieze grease for the threads.
Bottom Line Yes, I would recommend to a friend
Excellent Spark plug.
I recently replaced the spark plugs in my 2018 Toyota Rav4 because I was getting a random misfire error flag in my cars ECU. I did some research and tried the Desno IKH16TT plugs because they supposedly offered better performance and fuel economy. I did not feel that the performance was that great and on average, I had an average of 40 miles per tank less than what I would typically get then I would when my OEM (SK16HR11) plugs were new. Once I changed my spark plugs to the OEM plug, the power and fuel economy was restored in my vehicle and the random misfire error went away. If you are buying spark plugs for a Toyota Rav4, save yourself the headache and go with these. Just be sure to verify they are gapped properly, and you will be all set.
Bottom Line Yes, I would recommend to a friend
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