Most of the time a lawyer will name as many parties as they can think of in the initial filing for a lawsuit. Over time the list of those who share responsibility will be whittled down but it still takes a lawyer, time and money to extricate yourself from the initial filing.
For example:
Car is owned by and registered to Gringro LLC.
Car is provided to and driven by someone not affiliated with Gringo LLC.
If Gringo LLC has a contract with the driver, stating that the driver is responsible for all maintenance, repairs infractions and accidents that may help.
Driver has an accident. Driver is not related to the owner of Gringo LLC. Driver willingly accepts full responsibility and culpability, Gringo LLC should be able to wiggle out from under the lawsuit by getting a lawyer, presenting the contract and saying "no es mi culpa".
If there is no contract or if the driver is related to the owner of the company, or claims that the brakes were faulty, then Gringo LLC is in it for the long haul.
Creating a company to hold just a car for the purposes of limiting liability speaks to a logic flaw.
If you are providing a vehicle to someone who you think may be involved in an accident and the repercussions of that may come back and bite you, then don't provide a vehicle to that person. If the vehicle is for a family member, insure it to the hilt, make sure the driver is legitimately licensed, in the country legally and hope for the best.
Any decent lawyer will stand up on the first day in court and point out that Gringo LLC is not a real company. It has no bank account, no assets, performs no function or service other than hold a single vehicle and the Judge will roll their eyes and with the wave of a hand declare Gringo LLC not a legitimate company under whatever law applies as it conducts no business transactions of any kind.
A holding company registered in a foreign country other than the DR may be more advantageous but is more work, money and hassle. A Dominican registered holding company will probably not produce the intended benefits.
Just my opinion, I do not play a lawyer on TV.