In the moneyed vineyards and bistros of Napa Valley, friends had murmured about Paul Pelosi’s health and fitness long before the crash that made him the talk of the town this month.

There had been the attack in 2022 at his home in San Francisco, in which a man looking for his wife, then-House Speaker Nancy Pelosi, had assaulted him with a hammer. There had been the car accident earlier that year as he left the estate of a Democratic donor in nearby Oakville. He pleaded guilty to driving under the influence after crashing his Porsche into an oncoming Jeep, but friends said at the time that he’d had cataract surgery just days before.

Then, on July 3, under an afternoon sun that dappled the live oaks, Mr. Pelosi slammed his convertible into a parked Tesla, the authorities said, and what had been whispers about his well-being were suddenly all that certain circles here were talking about. And for Mr. Pelosi, 86, the crash appears to have followed a series of driving violations in recent years.

Over more than a decade, he has had at least eight driving violations in the San Francisco Bay Area, including driving the wrong way down a one-way street, speeding and, on more than one occasion, driving through a red light, court records show.

In the latest incident, Mr. Pelosi smashed the Tesla and then continued driving down a residential street in Napa Valley until his own car broke down and law enforcement officers came on the scene. The crash was serious enough that the authorities have asked that Mr. Pelosi take a behind-the-wheel driving test if he wants to remain on the road.

The crash shined a light on the couple’s life among the vineyards, where they own a country home, host fund-raisers and mingle with other wealthy residents. And when considered with the 2022 incident, it has alarmed some longtime friends and acquaintances, who say that Mr. Pelosi has been reluctant to give up the freedom of getting behind the wheel.

Four longtime associates in Northern California, who all spoke on condition of anonymity to discuss a sensitive personal matter, attributed the most recent crash to age and infirmity. None had raised their concerns to the Pelosis themselves, they said, because they did not want to hurt their relationship with the couple.

Mr. Pelosi’s past driving offenses occurred in four different Bay Area counties, including San Francisco, where the Pelosis own a stately residence in the exclusive Pacific Heights neighborhood, and Marin County, the scenic region between San Francisco and their home in the Napa Valley.

In 2011, Mr. Pelosi received three tickets and a warning in a five-month span alone. In May of that year, he was cited for speeding on a highway in San Mateo County. Two months later, he was caught crossing over double yellow lines near the family’s Napa Valley house and received a verbal warning for speeding during the same traffic stop. Less than two months after that, he was cited for failing to stop at a red light, also in Napa County.

In 2013, in San Mateo County, Mr. Pelosi drove through a red turn light. That same year, in San Francisco, he was pulled over for failing to stop at a stop sign, but that citation was later dismissed. In Marin, Mr. Pelosi used his cellphone without a hands-free device in 2014, and drove the wrong way down a one-way street in 2017.

A lawyer for Mr. Pelosi, Amanda Bevins, would not comment on the infractions, nor on whether the Department of Motor Vehicles had been made aware of the lingering effects of a head injury Mr. Pelosi suffered during the home invasion nearly four years ago. A representative for Ms. Pelosi also declined to comment.

Henry Wofford, a spokesman for the Napa County Sheriff’s Office, which is leading the investigation into the crash that occurred this month, said that his agency had always treated Mr. Pelosi the same as any other driver.

“We have absolutely nothing to gain to treat anyone with preferential treatment, whether his last name is Pelosi or it’s anything,” Mr. Wofford said.

Mr. Pelosi is now waiting to hear whether he will face charges yet again. The district attorney’s office in Napa County said it had not yet made that decision regarding the crash this month.

The New York Times also reviewed records in more than two dozen other counties — beyond the four in the Bay Area where he had violations — based on where the Pelosis lived, vacationed or traveled regularly for work. Mr. Pelosi did not appear to have any record of traffic violations in those counties. Courts keep traffic records for varying lengths of time, with some dating back less than a decade.

In recent years, Mr. Pelosi’s most serious driving offense occurred on the night of May 28, 2022, when he crashed after dinner at his friend’s estate in Napa Valley. He pleaded guilty to driving under the influence and was sentenced to community service, three years of probation, nearly $7,000 in restitution and court fees, as well as five days in jail — though he did not have to serve that time. He was required for a year to use a device that requires a breath sample to start his car, and to attend a three-month D.U.I. class.

Exactly five months after that crash, on Oct. 28, 2022, a man attempting to kidnap Nancy Pelosi broke into the Pelosis’ home in San Francisco, where he hit Mr. Pelosi on the head with a hammer, cracking his skull and injuring his hand and arm. Mr. Pelosi had to undergo surgery and spent six days in the hospital. The brutal incident drew greater attention to political violence.

Just over a year after that attack, on Dec. 7, 2023, Mr. Pelosi received a ticket in San Francisco when he drove his Porsche through a left turn light, court records show.

Two years after the attack, Mr. Pelosi said in a statement that he suffered persistent dizziness and vertigo that caused him to fall twice in his home.

“To this day, I walk slowly and have difficulty with my balance,” Mr. Pelosi said in the statement. “Nearly every day I get headaches that become migraines unless quickly addressed. I need to sleep during the day and cannot tolerate bright lights or loud noises for extended periods of time,” he said.

Mr. Pelosi said that the attack had also left him with nerve damage to his left hand which, for months, made “basic tasks like using buttons, cutlery and simple tools more difficult.”

The Department of Motor Vehicles said that, for privacy reasons, it could not respond to questions about whether or not Mr. Pelosi’s doctors had reported his head injury to the department. And it did not respond to a separate public records request seeking Mr. Pelosi’s full driving record before publication of this article.

In California, doctors, law enforcement or family members concerned about a person’s driving can request that the DMV re-evaluate a person’s capacity to do so. And physicians are legally required to inform the department of medical conditions that involve lapses in consciousness, though the definition is fairly broad and can include alertness and sensory motor functions.

“When you think about driving, you have to see, think and do,” said Elizabeth Soles, the executive director of the Association for Driver Rehabilitation Specialists, which provides support for disabled and older drivers.

Oftentimes, Ms. Soles said, older drivers begin to self-limit by driving only during the day, on quiet, familiar streets, or by avoiding highways. And sometimes assessments can result in similar restrictions that allow a driver to remain on the road in a limited capacity.

It can be challenging, she added, to identify the exact moment when it is time for an older driver to give up their license completely, and equally challenging for families to broach those conversations.

As a teenager, Mr. Pelosi suffered a personal tragedy in 1957 when he was behind the wheel of a Corvette that overturned in San Mateo County, killing his 19-year-old brother. A jury cleared him of wrongdoing.

This month, Mr. Pelosi’s accident occurred on a quiet block of homes with towering redwood trees in Yountville, a small tourist town known for its many wine tasting rooms and its Michelin-starred restaurant, the French Laundry. His crash was only a couple blocks away from the esteemed dining room.

The circumstances, however, remain unclear. While traveling a route that would have taken him to the Pelosis’ Napa Valley estate on a Friday afternoon, Mr. Pelosi appeared to crash into a Tesla that was parallel parked.

The Tesla was clipped so hard that the rear bumper was smashed in and a front wheel climbed the curb, said Ryan Rice, 29, who lives on the block. He said that when he came to see what had happened minutes after the crash, the Tesla’s owner was distraught, and the driver who had hit her car was gone.

From there, it is less than a 15-minute drive down a country road, through dizzying rows of wine grapes, to the Pelosis’ Napa Valley estate, a gated property, perched on a hill, that they have owned since 1990.

On a recent afternoon, the gate was locked, and all that was visible were green lawns, a winding driveway and a white stone statue.

Kevin Yamamura contributed reporting. Sheelagh McNeill contributed research.