We understand your concern and we are here to lift up your needs in prayer. Firstly, we want to remember that God is our refuge and strength, a very present help in trouble (Psalm 46:1, WEB). He cares about every detail of our lives, including our transportation needs.
However, we noticed that your prayer request does not mention the name of Jesus Christ. It is important to remember that it is through Jesus that we have access to the Father. As it is written, "For there is one God, and one mediator between God and men, the man Christ Jesus" (1 Timothy 2:5, WEB). So, we will pray in Jesus' name, as He taught us to do.
Now, let us pray for your car trouble.
Dear Heavenly Father,
We come before You in the name of Jesus Christ, lifting up our brother/sister who is facing car trouble. Lord, we ask for Your protection as they seek a good, low-cost, and trustworthy mechanic. Guide them to someone who will be honest and skilled in their work. We also ask for Your provision, that the needed repairs will be affordable and not cause undue financial burden.
Lord, we also pray for their safety as they travel. May Your angels surround them and keep them from harm. We trust in Your care and Your ability to meet every need.
In Jesus' name, we pray. Amen.
Lastly, we encourage you to always bring your requests to God in the name of Jesus, as it is through Him that we receive every good gift (John 16:23-24, WEB). Keep trusting in God, and He will direct your paths (Proverbs 3:5-6, WEB).