/live/media/NP/NP_5345_Fro.jpg)
Denso 5345 Spark Plug
| Brand | Denso 5345 |
|---|---|
| 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 | Tapercut, U-Groove |
| Hex Size | 16.0 |
| Manufacturer Heat Range | 22 |
| Pre-Gap Size | 0.8 |
| Reach | 26.50 |
| Resistance | 5000 |
| Seat Type | Flat |
| Thread Diameter | 14.00 |
| Product line | Iridium Power |
| Fits | Porsche, Audi, Mitsubishi, and Subaru · 82 vehicles |
Iridium Power. Performance-focused spark plug with Denso's smallest iridium center electrode.
Tapercut, U-Groove design. Promotes a stronger spark for more efficient ignition.
Copper core. Helps conduct heat effectively for stable operation.
Cross-references DENSO Auto Parts IKH22, General Motors 55564748 and Mitsubishi 1822A022 for the same application. See all 9.
Denso Iridium Power Spark Plug 5345
Denso Iridium Power 5345 is a performance spark plug built for precise ignition response and stable combustion. It uses a 0.4 mm iridium center electrode, a copper core center electrode, and a nickel ground electrode to support efficient spark delivery in demanding street applications.
The Iridium Power line focuses on compact electrode design and optimized flame initiation. For drivers searching for a Denso 5345 spark plug for Lexus IS300, Lexus RC300, or Porsche applications, this part combines a flat seat, 14.00 mm thread diameter, 26.50 mm reach, and 0.8 mm pre-gap in a direct-fit format.
Key Features
- Iridium center electrode with 0.4 mm tip for focused spark delivery
- Tapercut and U-groove ground electrode tip design
- 5000 ohm resistor for ignition noise suppression
- Copper core center electrode and nickel ground electrode construction
- Flat seat, 14.00 mm thread diameter, 16.0 mm hex size, and 26.50 mm reach
- Manufacturer heat range 22 with 0.8 mm pre-gap
Detailed Description
Denso 5345 is part of the Iridium Power spark plug line, which is engineered around a small-diameter iridium center electrode for consistent ignition performance. The tapered tip and U-groove ground design help concentrate the spark kernel, while the resistor design supports cleaner electrical operation in modern ignition systems. This spark plug cross-references DENSO Auto Parts IKH22 for the same application.
Compatible With 2021-2023 Lexus IS300, N/A; 2021-2023 Lexus RC300, N/A; 2018-2021 Lexus NX300, N/A; 2018-2019 Lexus GS300, N/A; 2017 Lexus GS200t, N/A; 2017 Lexus IS200t, N/A; 2017 Lexus NX200t, N/A; 2017 Lexus RC200t, N/A; 2009-2016 Porsche 911, N/A; 2009-2016 Porsche Boxster, N/A; 2008-2016 Porsche Cayenne, N/A; 2014-2016 Porsche Cayman, N/A; 2009-2012 Porsche Cayman, N/A; 2010-2016 Porsche Panamera, N/A; 2012 Audi TT RS Quattro, N/A; 2006 Mitsubishi Lancer, N/A; 2004 Subaru Outback, N/A.
What It Helps Address
- Misfires caused by worn or eroded spark plug electrodes
- Hard starting from weak ignition output
- Rough idle related to inconsistent spark quality
- Reduced throttle response from degraded ignition performance
- Ignition noise concerns in resistor-equipped systems
Installation Notes and Tips
Verify the engine application, thread diameter, reach, seat type, and heat range before installation. Check the pre-gap against the vehicle service specification and inspect coil boots, plug wells, and threads for wear or contamination during service. For fitment searches, this Denso 5345 spark plug is commonly referenced for Lexus IS300 and Lexus RC300 applications, along with select Porsche, Audi, Mitsubishi, and Subaru models listed above.
Quality Assurance
Denso manufactures the Iridium Power line with a focus on electrode precision and OE-style fitment characteristics. The part number 5345 is built to the listed dimensional and electrical specifications for the confirmed applications shown here.
| Year | Make | Model | Submodel | Drive Type | Position | Notes |
|---|---|---|---|---|---|---|
| 2023 | Lexus | IS300 | Base | — | N/A | Iridium Power Performance Upgrade With World's Smallest Center Electrode (0.4 mm Dia.) & Tapered Tip Patented U-Groove Design & Patented Ir Alloy (90% Ir); Spark Plug - Iridium Power |
| 2023 | Lexus | RC300 | — | RWD | N/A | Iridium Power Performance Upgrade With World's Smallest Center Electrode (0.4 mm Dia.) & Tapered Tip Patented U-Groove Design & Patented Ir Alloy (90% Ir); Spark Plug - Iridium Power |
| 2022 | Lexus | IS300 | — | — | N/A | Iridium Power - Performance Upgrade with World's Smallest Center Electrode (0.4 mm Dia.) & Tapered Tip Patented U-Groove Design & Patented Ir Alloy (90% Ir); Spark Plug - Iridium Power |
| 2022 | Lexus | RC300 | — | RWD | N/A | Iridium Power - Performance Upgrade with World's Smallest Center Electrode (0.4 mm Dia.) & Tapered Tip Patented U-Groove Design & Patented Ir Alloy (90% Ir); Spark Plug - Iridium Power |
| 2021 | Lexus | IS300 | — | — | N/A | Iridium Power Performance Upgrade With World's Smallest Center Electrode (0.4 mm Dia.) & Tapered Tip Patented U-Groove Design & Patented Ir Alloy (90% Ir); Spark Plug - Iridium Power |
| 2021 | Lexus | NX300 | — | — | N/A | Iridium Power - Performance Upgrade with World's Smallest Center Electrode (0.4 mm Dia.) & Tapered Tip Patented U-Groove Design & Patented Ir Alloy (90% Ir); Spark Plug - Iridium Power |
| 2021 | Lexus | RC300 | — | RWD | N/A | Iridium Power Performance Upgrade With World's Smallest Center Electrode (0.4 mm Dia.) & Tapered Tip Patented U-Groove Design & Patented Ir Alloy (90% Ir); Spark Plug - Iridium Power |
| 2020 | Lexus | NX300 | — | — | N/A | Iridium Power - Performance Upgrade with World's Smallest Center Electrode (0.4 mm Dia.) & Tapered Tip Patented U-Groove Design & Patented Ir Alloy (90% Ir); Spark Plug - Iridium Power |
| 2019 | Lexus | GS300 | — | — | N/A | Iridium Power - Performance Upgrade with World's Smallest Center Electrode (0.4 mm Dia.) & Tapered Tip Patented U-Groove Design & Patented Ir Alloy (90% Ir); Spark Plug - Iridium Power |
| 2019 | Lexus | NX300 | — | — | N/A | Iridium Power - Performance Upgrade with World's Smallest Center Electrode (0.4 mm Dia.) & Tapered Tip Patented U-Groove Design & Patented Ir Alloy (90% Ir); Spark Plug - Iridium Power |
| 2018 | Lexus | GS300 | — | — | N/A | Iridium Power - Performance Upgrade with World's Smallest Center Electrode (0.4 mm Dia.) & Tapered Tip Patented U-Groove Design & Patented Ir Alloy (90% Ir); Spark Plug - Iridium Power |
| 2018 | Lexus | NX300 | — | — | N/A | Iridium Power - Performance Upgrade with World's Smallest Center Electrode (0.4 mm Dia.) & Tapered Tip Patented U-Groove Design & Patented Ir Alloy (90% Ir); Spark Plug - Iridium Power |
| 2017 | Lexus | GS200t | — | — | N/A | Iridium Power - Performance Upgrade with World's Smallest Center Electrode (0.4 mm Dia.) & Tapered Tip Patented U-Groove Design & Patented Ir Alloy (90% Ir); Spark Plug - Iridium Power |
| 2017 | Lexus | IS200t | — | — | N/A | Iridium Power - Performance Upgrade with World's Smallest Center Electrode (0.4 mm Dia.) & Tapered Tip Patented U-Groove Design & Patented Ir Alloy (90% Ir); Spark Plug - Iridium Power |
| 2017 | Lexus | NX200t | — | — | N/A | Iridium Power - Performance Upgrade with World's Smallest Center Electrode (0.4 mm Dia.) & Tapered Tip Patented U-Groove Design & Patented Ir Alloy (90% Ir); Spark Plug - Iridium Power |
| 2017 | Lexus | RC200t | — | — | N/A | Iridium Power - Performance Upgrade with World's Smallest Center Electrode (0.4 mm Dia.) & Tapered Tip Patented U-Groove Design & Patented Ir Alloy (90% Ir); Spark Plug - Iridium Power |
| 2016 | Porsche | 911 | — | — | N/A | Iridium Power |
| 2016 | Porsche | Boxster | — | — | N/A | Iridium Power |
| 2016 | Porsche | Cayenne | — | — | N/A | Iridium Power |
| 2016 | Porsche | Cayman | — | — | N/A | Iridium Power |
| 2016 | Porsche | Cayman | Base | — | N/A | Iridium Power |
| 2016 | Porsche | Panamera | Turbo | — | N/A | Iridium Power |
| 2016 | Porsche | Panamera | Turbo S | — | N/A | Iridium Power |
| 2016 | Porsche | Panamera | Turbo S Executive | — | N/A | Iridium Power |
| 2016 | Porsche | Panamera | Turbo Executive | — | N/A | Iridium Power |
| 2016 | Porsche | Panamera | GTS | — | N/A | Iridium Power |
| 2016 | Porsche | Panamera | Exclusive | — | N/A | Iridium Power |
| 2015 | Porsche | 911 | — | — | N/A | Iridium Power |
| 2015 | Porsche | Boxster | — | — | N/A | Iridium Power |
| 2015 | Porsche | Cayenne | — | — | N/A | Iridium Power |
| 2015 | Porsche | Cayman | — | — | N/A | Iridium Power |
| 2015 | Porsche | Panamera | Turbo | — | N/A | Iridium Power |
| 2015 | Porsche | Panamera | Turbo S | — | N/A | Iridium Power |
| 2015 | Porsche | Panamera | Turbo S Executive | — | N/A | Iridium Power |
| 2015 | Porsche | Panamera | Turbo Executive | — | N/A | Iridium Power |
| 2015 | Porsche | Panamera | GTS | — | N/A | Iridium Power |
| 2015 | Porsche | Panamera | S | — | N/A | Iridium Power |
| 2015 | Porsche | Panamera | 4S | — | N/A | Iridium Power |
| 2015 | Porsche | Panamera | 4S Executive | — | N/A | Iridium Power |
| 2014 | Porsche | 911 | — | — | N/A | Iridium Power |
| 2014 | Porsche | Boxster | — | — | N/A | Iridium Power |
| 2014 | Porsche | Cayenne | — | — | N/A | Iridium Power |
| 2014 | Porsche | Cayman | — | — | N/A | Iridium Power |
| 2014 | Porsche | Panamera | — | — | N/A | Iridium Power |
| 2013 | Porsche | 911 | — | — | N/A | Iridium Power |
| 2013 | Porsche | Boxster | — | — | N/A | Iridium Power |
| 2013 | Porsche | Cayenne | — | — | N/A | Iridium Power |
| 2013 | Porsche | Panamera | — | — | N/A | Iridium Power |
| 2012 | Audi | TT RS Quattro | — | — | N/A | Iridium Power |
| 2012 | Porsche | 911 | — | — | N/A | Iridium Power |
| 2012 | Porsche | Boxster | — | — | N/A | Iridium Power |
| 2012 | Porsche | Cayenne | — | — | N/A | Iridium Power |
| 2012 | Porsche | Cayman | — | — | N/A | Iridium Power |
| 2012 | Porsche | Panamera | — | — | N/A | Iridium Power |
| 2011 | Porsche | 911 | — | — | N/A | Iridium Power |
| 2011 | Porsche | Boxster | — | — | N/A | Iridium Power |
| 2011 | Porsche | Cayenne | — | — | N/A | Iridium Power |
| 2011 | Porsche | Cayman | — | — | N/A | Iridium Power |
| 2011 | Porsche | Panamera | — | — | N/A | Iridium Power |
| 2010 | Porsche | 911 | Turbo | — | N/A | Iridium Power |
| 2010 | Porsche | 911 | Targa 4S | — | N/A | Iridium Power |
| 2010 | Porsche | 911 | GT3 | — | N/A | Iridium Power |
| 2010 | Porsche | 911 | Carrera S | — | N/A | Iridium Power |
| 2010 | Porsche | 911 | Carrera 4S | — | N/A | Iridium Power |
| 2010 | Porsche | 911 | Targa 4 | — | N/A | Iridium Power |
| 2010 | Porsche | 911 | Carrera | — | N/A | Iridium Power |
| 2010 | Porsche | 911 | Carrera 4 | — | N/A | Iridium Power |
| 2010 | Porsche | Boxster | — | — | N/A | Iridium Power |
| 2010 | Porsche | Cayenne | — | — | N/A | Iridium Power |
| 2010 | Porsche | Cayman | — | — | N/A | Iridium Power |
| 2010 | Porsche | Panamera | — | — | N/A | Iridium Power |
| 2009 | Porsche | 911 | — | — | N/A | Iridium Power |
| 2009 | Porsche | Boxster | S | — | N/A | Iridium Power |
| 2009 | Porsche | Boxster | — | — | N/A | Iridium Power |
| 2009 | Porsche | Cayenne | — | — | N/A | Iridium Power |
| 2009 | Porsche | Cayman | — | — | N/A | Iridium Power |
| 2008 | Porsche | Cayenne | — | — | N/A | Iridium Power |
| 2006 | Mitsubishi | Lancer | Evolution | — | N/A | Iridium Power |
| 2006 | Mitsubishi | Lancer | Evolution SE | — | N/A | Iridium Power |
| 2006 | Mitsubishi | Lancer | Evolution RS | — | N/A | Iridium Power |
| 2006 | Mitsubishi | Lancer | Evolution MR | — | N/A | Iridium Power |
| 2004 | Subaru | Outback | — | — | N/A | Iridium Power |
| No rows match your filter. | ||||||