local plr = game.Players.LocalPlayer
local car
for _, c in ipairs(workspace.CivCars:GetChildren()) do
    local o = c:FindFirstChild("Owner")
    if o and o.Value == plr.Name then car = c end
end
if not car then print("no car") return end
if not car.PrimaryPart then
    local body = car:FindFirstChild("Body")
    car.PrimaryPart = (body and body:FindFirstChild("#Weight", true)) or (body and body:FindFirstChildWhichIsA("BasePart", true)) or car:FindFirstChildWhichIsA("BasePart")
end
local part = car.PrimaryPart
print("car:", car.Name, "| primary:", part and part.Name, "| anchored:", tostring(part and part.Anchored))
print("before:", tostring(part.Position))
local hrp = plr.Character.HumanoidRootPart
local ok, err = pcall(function() car:SetPrimaryPartCFrame(CFrame.new(hrp.Position + Vector3.new(0, 3, -10))) end)
print("move ok:", tostring(ok), tostring(err))
task.wait(1)
print("after 1s:", tostring(part.Position), "| dist from player:", math.floor((part.Position - hrp.Position).Magnitude))
task.wait(2)
print("after 3s:", tostring(part.Position), "| dist from player:", math.floor((part.Position - hrp.Position).Magnitude))