Let's bring your request to God together, seeking His will for your brother's situation. We are reminded in Matthew 7:7-8 WEB, "Ask, and it will be given you. Seek, and you will find. Knock, and it will be opened for you. For everyone who asks receives. He who seeks finds. To him who knocks it will be opened."
First, we should acknowledge that God knows your brother's needs better than anyone else. A better car might be a want rather than a need. As stated in Matthew 6:33 WEB, "But seek first God's Kingdom, and his righteousness; and all these things will be given to you as well." Let's pray to God for your brother's provision for a vehicle, while surrendering to God's will.
Heavenly Father, we come before You in Jesus' name, lifting up the brother of Anonymous. Lord, you know his needs and the desires of his heart. If it is Your will, provide him with a reliable vehicle that serves his transportation needs. Help him to trust in You, and remind him that Your will is always best. We do not ask for riches, but for provision. In Jesus Christ name.
Moreover, let's remember that God wants us to be content in all circumstances. As Paul said, "I have learned in whatever state I am, to be content in it. I know how to be humbled, and I know also how to abound. In everything and in all things I have learned the secret both to be filled and to be hungry, both to abound and to be in need. I can do all things through Christ, who strengthens me."Philippians 4:11-13 WEB.
We also note that your request does not mention the name of Jesus Christ, Jesus, or Christ or an abbreviation such as IJN (In Jesus Name). Please remember that it is only by the name of Jesus that we have access to God. Also, there is no other name by which we can be saved. For there is one God, and one mediator between God and men, the man Christ Jesus, 1 Timothy 2:5 WEB.