Dominic Ball's stunning stoppage-time strike gave QPR a 3-2 victory over Cardiff - their first win in eight matches.
Joe Ralls scored twice as Cardiff came back from 2-0 down to level with five minutes remaining.
But Ball, on as a substitute, blasted home from 25 yards to end Rangers' miserable run in emphatic fashion.
First-half goals from Ilias Chair and Todd Kane put QPR 2-0 before Ralls' penalty soon after the interval brought Cardiff back into the game.
After the Bluebirds were awarded a second penalty, Ralls followed up to score from the rebound after his spot-kick was saved by goalkeeper Seny Dieng.
That looked like preserving Cardiff's unbeaten away league record this season, but Ball scored a fabulous winner to give his side the points.
QPR swapped their traditional blue and white hoops for a red and white shirt in the style of the away kit worn by the club's 1975-76 team, who were pipped to the title by Liverpool.
The kit has been produced to mark the 45th anniversary of Rangers' best season.
The likes of Stan Bowles and Gerry Francis, who starred in that team, would have been proud of the two goals scored in a one-sided opening 45 minutes.
A fantastic save by Alex Smithies, playing against his former club, had prevented Albert Adomah putting QPR ahead after just three minutes.
Adomah was set up by Lyndon Dykes' reverse pass but Smithies dived to his right to push away the winger's shot.
Rangers, without a goal in their previous four matches, took the lead after 15 minutes.
Adomah collected Tom Carroll's clever pass and turned away from Joe Bennett before crossing from the right towards Chair, whose volley bounced up off the ground and into the far corner of the net.
However, Smithies could do nothing about Chair's opener nor Kane's 27th-minute volley with the outside of the right boot.
Chair did superbly on the left and directed the ball back for Kane, who fired home from near the edge of the penalty area.
Chair caused Cardiff's defence major problems but missed a great chance to make it three just before half-time, shooting wide of the target after being teed up by the recalled Bright Osayi-Samuel following a Rangers counter-attack.
Had that gone in, the second half would have been more comfortable for the hosts, who were pegged back four minutes after the break by Ralls' coolly-taken spot-kick after Yoann Barbet had clumsily brought down Kieffer Moore.
A handball by Conor Masterson as the defender challenged Moore in the air led to Ralls' second. QPR seemed out of ideas but hit back with only the third goal of Ball's career.
What the managers said...
QPR's Mark Warburton: "In the first half we played very well and looked a very good team. Energy was the key for us today. We played with real intensity and purpose. We got into good areas and were dangerous. But it's a 90-minute game. We've got to learn from the second half, where we shot ourselves in the foot by giving away ridiculous penalties.
"From a comfortable position - we should have been 3-0 up - it's 2-2 and they're putting balls in our box. When you're in the area against good forwards you've got to make good decisions, and on those occasions we didn't."
Cardiff's Neil Harris: "We were outfought, outrun and didn't defend our penalty area. We can't give teams head starts. I'm here to win games of football and be successful as Cardiff City manager and I expect my players to have the same mentality.
"We've got to bounce back. It's their jobs. It's what we're asking from them. It's their job to represent the club to the best of their ability and at the moment they're not doing it. I told the players in no uncertain terms where they're at fault and who is at fault. I've never been so angry after a game.
"I want to be successful and win games of football. If my players don't do that then they won't play."