For a 2003 Toyota Solara, it's recommended to use a coolant that meets Toyota's specifications, typically a long-life ethylene glycol-based antifreeze. Look for a coolant that is either pink or red in color, as these are formulated for Toyota vehicles. Make sure to check your owner’s manual for specific recommendations and ensure the coolant is mixed with water at a 50/50 ratio unless otherwise specified.
As you listed no year I cannot tell you what it is supposed to use. All, I can tell you is to use exactly what Toyota recommends and nothing else. And I would also ask you the question, Why Not put 5w20 in your Toyota Solara if that is what Toyota recommends?
Green
5 qt
In a 2003 Toyota Solara, the oxygen sensor is protected by the EFI fuse, which is typically located in the engine compartment fuse box. This fuse is responsible for powering the engine's electronic fuel injection system, including the oxygen sensor. If the fuse is blown, it may lead to issues with engine performance and fuel efficiency. Always refer to the owner's manual for specific fuse details and locations.
Honda type 2 or Toyota Pink.
Green
A 1992 Toyota Corolla can take any type of standard antifreeze. It should be labeled as being suitable for all makes and models of cars.
dexcool.......same as what newer gm vehicles use.
One type of antifreeze that can be used is Pentosin PENTOFROST A1. Pentofrost A1 is an antifreeze for Asian vehicles in water-cooled engines.
I use the genuine 'Toyota Long life Coolant' it is red in colour
A 2003 Ram uses red, five year antifreeze.
Yes, the 1999 Toyota Solara uses R-134a refrigerant, which is not being phased out. However, R-12, an older refrigerant, was commonly used in vehicles prior to the mid-1990s and has been largely phased out due to environmental concerns. If you're servicing a 1999 Solara, R-134a is the appropriate refrigerant to use.