Your car would be a construct. Warforge are not constructs though, they are "living constructs". This is one of those areas where 5e's oversimplifications complicate things in ways that pretty much remove it from relevance
living construct is a created being given sentience and free will through powerful and complex creation enchantments. Warforged are living constructs that combine aspects of both constructs and living creatures, as detailed below.
Features: As a living construct, a warforged has the following features.
—A warforged derives its Hit Dice, base attack bonus progression, saving throws, and skill points from the class it selects.
Traits: A warforged possesses the following traits.
—Unlike other constructs, a warforged has a Constitution score.
—Unlike other constructs, a warforged does not have low-light vision or darkvision.
—Unlike other constructs, a warforged is not immune to mind-affecting spells and abilities.
—Immunity to poison, sleep effects, paralysis, disease, nausea, fatigue, exhaustion, effects that cause the sickened condition, and energy drain.
—A warforged cannot heal damage naturally.
—Unlike other constructs, warforged are subject to critical hits, nonlethal damage, stunning, ability damage, ability drain, and death effects or necromancy effects.
—As living constructs, warforged can be affected by spells that target living creatures as well as by those that target constructs. Damage dealt to a warforged can be healed by a cure light wounds spell or a repair light damage spell, for example, and a warforged is vulnerable to disable construct and harm. However, spells from the healing subschool and supernatural abilities that cure hit point damage or ability damage provide only half their normal effect to a warforged.
—The unusual physical construction of warforged makes them vulnerable to certain spells and effects that normally don’t affect living creatures. A warforged takes damage from heat metal and chill metal as if he were wearing metal armor. Likewise, a warforged is affected by repel metal or stone as if he were wearing metal armor. A warforged is repelled by repel wood. The iron in the body of a warforged makes him vulnerable to rusting grasp. The creature takes 2d6 points of damage from the spell (Reflex half; save DC 14 + caster’s ability modifier). A warforged takes the same damage from a rust monster’s touch (Reflex DC 17 half). Spells such as stone to flesh, stone shape, warp wood, and wood shape affect objects only, and thus cannot be used on the stone and wood parts of a warforged.
—A warforged responds slightly differently from other living creatures when reduced to 0 hit points. A warforged with 0 hit points is disabled, just like a living creature. He can only take a single move action or standard action in each round, but strenuous activity does not risk further injury. When his hit points are less than 0 and greater than –10, a warforged is inert. He is unconscious and helpless, and he cannot perform any actions. However, an inert warforged does not lose additional hit points unless more damage is dealt to him, as with a living creature that is stable.
—As a living construct, a warforged can be raised or resurrected.
—A warforged does not need to eat, sleep, or breathe, but he can still benefit from the effects of consumable spells and magic items such as heroes’ feast and potions.
—Although living constructs do not need to sleep, a warforged wizard must rest for 8 hours before preparing spells.
Features: As a living construct, a warforged has the following features.
—A warforged derives its Hit Dice, base attack bonus progression, saving throws, and skill points from the class it selects.
Traits: A warforged possesses the following traits.
—Unlike other constructs, a warforged has a Constitution score.
—Unlike other constructs, a warforged does not have low-light vision or darkvision.
—Unlike other constructs, a warforged is not immune to mind-affecting spells and abilities.
—Immunity to poison, sleep effects, paralysis, disease, nausea, fatigue, exhaustion, effects that cause the sickened condition, and energy drain.
—A warforged cannot heal damage naturally.
—Unlike other constructs, warforged are subject to critical hits, nonlethal damage, stunning, ability damage, ability drain, and death effects or necromancy effects.
—As living constructs, warforged can be affected by spells that target living creatures as well as by those that target constructs. Damage dealt to a warforged can be healed by a cure light wounds spell or a repair light damage spell, for example, and a warforged is vulnerable to disable construct and harm. However, spells from the healing subschool and supernatural abilities that cure hit point damage or ability damage provide only half their normal effect to a warforged.
—The unusual physical construction of warforged makes them vulnerable to certain spells and effects that normally don’t affect living creatures. A warforged takes damage from heat metal and chill metal as if he were wearing metal armor. Likewise, a warforged is affected by repel metal or stone as if he were wearing metal armor. A warforged is repelled by repel wood. The iron in the body of a warforged makes him vulnerable to rusting grasp. The creature takes 2d6 points of damage from the spell (Reflex half; save DC 14 + caster’s ability modifier). A warforged takes the same damage from a rust monster’s touch (Reflex DC 17 half). Spells such as stone to flesh, stone shape, warp wood, and wood shape affect objects only, and thus cannot be used on the stone and wood parts of a warforged.
—A warforged responds slightly differently from other living creatures when reduced to 0 hit points. A warforged with 0 hit points is disabled, just like a living creature. He can only take a single move action or standard action in each round, but strenuous activity does not risk further injury. When his hit points are less than 0 and greater than –10, a warforged is inert. He is unconscious and helpless, and he cannot perform any actions. However, an inert warforged does not lose additional hit points unless more damage is dealt to him, as with a living creature that is stable.
—As a living construct, a warforged can be raised or resurrected.
—A warforged does not need to eat, sleep, or breathe, but he can still benefit from the effects of consumable spells and magic items such as heroes’ feast and potions.
—Although living constructs do not need to sleep, a warforged wizard must rest for 8 hours before preparing spells.
I'm pretty sure that "alchemical fluid" is referred to as "sap" in some places
