old DENSO PART:       3444 (DEN3444) SC20HR-11 
new DENSO PART:    3499 (DEN3499) SC16HR11  
old TOYOTA OEM#:     90919-01253  
new TOYOTA OEM#:   90919-01275 
Description: 

• 0.7mm iridium tipped laser welded fine wire Center Electrode and platinum tipped ground electrode
• Machine Rolled Threads prevent seizing or cross threading during installation and removal
• 100% pre-fired to assure the highest quality possible
• Purified alumina powder Insulator provides exceptional strength and thermal conductivity
• Five-rib insulator prevents Flashover
• Copper-glass seal bonds Center Electrode and insulator for a gas-tight seal

Specs:
Shell

• Thread Size: 12mm
• Thread Pitch: 1.25mm
• Seat Type: Gasket
• Resistor: Yes
• Resistor Value: 5K Ohm
• Reach: 26.5mm (1.04")
• Hex Size: 9/16" (14mm)
• Terminal Type: Solid
• Overall Height: ISO
• Gap: .043" (1.1mm)

Center Electrode

• Material: Iridium
• Type: Fine Wire
• Size: 0.7mm
• Projection: Projected

Ground Electrode

• Material: Platinum
• Type: Standard
• Quantity: 1

Specifications

• Torque Specs: Cast Iron: 11-18 lb. ft. Aluminum: 11-18 lb. ft.
• Brand: Denso
• Heat Range: 20
• Longevity: 80-100k

Product Description:

Toyota Part Number 90919-01253

Denso Part Number SC20HR11

Some of the cars these plugs fit

        2011-2012 Lexus CT200h

        2012-2013 Scion iQ

        2008-2013 Scion xD

        2009-2013 Toyota Corolla 1.8L

        2009-2013 Toyota Matrix 1.8L

        2010-2013 Toyota Prius

        2012-2013 Toyota Prius V