Chipotle Mexican Grill is losing customers to McDonalds — and is going to have a hard time winning them back, a Wall Street analyst warned on Friday.

While the burrito chain admits that 75 percent of the customers it lost after its recent troubles with food-born illnesses traded down to less-expensive fast food, Chipotle’s recent 5 percent price increase will make it harder to woo them back and leave its problems behind, the analyst said in a report.

The analyst, Andrew Charles, of Cowen and Company, surveyed 2,5000 consumers who gave Chipotle a low score on quality and trustworthiness, he said in the report.

In fact, Charles wrote in the report, the low scores hadn’t improved much since immediately after the 2015 food scares.

“Higher pricing does not strike us as a compelling tactic to regain traffic,” Charles wrote.

In the wake of the reports, investors pushed Chipotle shares down 5.4 percent, to $300.03. The shares are down 26 percent over the last year and off 40 percent from their 52-week high.

Cowan lowered its price target to $250 from $370.

As Chipotle tried to move beyond its 2015 food-scare — changing food prep rules, sick-day regulations and giving out coupons — it was in the headlines again this summer when vermin invaded a Dallas store and more than 100 customers contracted norovirus after eating at a Sterling, Va., location.

Even activist investor, Bill Ackman, Chipotle’s largest shareholder, pulled out all the stops in July to reassure customers by tweeting a picture of himself standing in line at a Chipotle.

But budget-conscious consumers seem to be voting with their feet.

“A hefty 5 percent price increase over the next two to four quarters seems imprudent,” wrote Charles, of Chipotle’s move to increase menu prices.

Chipotle’s average check at $12.11 is twice as high as quick-service eatery prices, including the big three burger chains, Jack in the Box, Sonic, Subway and Taco Bell, according to the Cowen report.

Chipotle announced the price increase in April when it released strong first-quarter results, beating Wall Street expectations and earning a $46.1 million profit.

The two incidents this summer set the chain back on its heels, though.

Chipotle took issue with the Cowen report, saying its ongoing consumer surveys show growing support for its brand and questioned Cowan’s methodology.

“In many measures, we are at or near pre-crisis levels,” Chipotle spokesman, Chris Arnold said. “And we continue working hard to restore trust.”