Martin Truex Jr. and his team have been penalised after their car failed the post-race inspection at Chicagoland Speedway last weekend.
Truex had finished the race 16th but his car was found to be higher than the NASCAR rulebook allows for the right-rear quarter panel.
As a consequence, Martin was docked 25 points in the drivers' standings, car owner Teresa Earnhardt was docked the same ammount in the owner standings, while crew chief Kavin Manion was fined $25,000 and place on probation until the end of the year.
Manion said Earnhardt Ganassi Racing doesn't plan to appeal the penalties imposed.
"We completely understand NASCAR's position on the rule violation and will not appeal the penalty imposed," Manion said. "In addition, we are taking steps internally to ensure this will not happen in the future."
The points penalty doesn't affect the driver's ranking in the standings where he sits in 24th place.