Red Bulls enters a new era in the 2025 F1 season, with its new RB21 car set to be the first since 2005's RB1 not to be designed by Adrian Newey.
The long-time chief technical officer quit in 2024, bringing to an end a successful period that yielded six constructors' titles and eight drivers' crowns for Sebastian Vettel and Max Verstappen.
He is set to join Aston Martin later in 2025 as managing technical partner.
With that in mind, RacingNews365 has taken a look back at how each previous F1 team he has departed, with one in particular standing as a warning to Red Bull for what can happen post-Newey.
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Leyton House
Newey's first taste of F1 came with the small Leyton House team - which had originally been named March.
For 1990, he rose to technical director, where some of the ideas he'd deploy at Williams were first put into practice, later to be refined.
The highlight came at the 1990 French GP when Ivan Capelli led but a misfire developed allowing Alain Prost to steal the win. That was as good as it got for Leyton House, which after boardroom arguments let Newey go in time for 1991 - although he had already an offer from Williams.
Leyton House would fold after the 1991 Australian GP, one of a number of plucky underdog teams that populated the grid in the late 1980s and early 1990s.
Williams
After a slow-start to 1991 prevented Nigel Mansell from winning that season's title, by 1992, the technologically-advanced FW14B crushed the opposition.
Mansell won a then-record nine races in 1992 to claim his title, handing Newey his first drivers' and constructors' crowns, followed by another pair for Alain Prost and the team in '93.
After the tragedy of the loss of Ayrton Senna and rise of Michael Schumacher, Newey wanted a greater say in the running of the team, but Frank Williams and Patrick Head were initially reluctant.
Jacques Villeneuve was signed for 1996 without Newey's knowledge, with Williams and Head promising it would never happen again, but Heinz-Harald Frentzen was signed to replace Damon Hill for 1997, at which point Newey decided to leave.
Newey did have some influence over the initial design of the 1997 Williams, and it is credited to his total of championships.
But since his departure 28 years ago, Williams has fallen from F1 powerhouse to midfield also-ran, scrapping for the odd point at times.
Since he left, the team has won just 11 races, with 10 of those coming between 2001 and 2004 in the Williams-BMW era. Its last win to-date was Pastor Maldonado in the 2012 Spanish GP - meaning the team has won just one race in the last 21 years after Juan Pablo Montoya's success in the 2004 Brazilian GP.
McLaren
Joining McLaren too late to design the 1997 car, Newey's first true McLaren was the 1998 car that propelled Mika Hakkinen to the first of two successive drivers' titles.
But Newey could only win the 1998 constructors' as in 1999, the Ferrari stranglehold took place that would last until 2004.
Tensions arose with McLaren boss Ron Dennis who tried to wrestle control from Newey, with a deal in place to sign for Jaguar in 2001 - then Ford's works team.
After the failure of the revolutionary MP4-18 of 2004 which never raced, Newey was headed out the exit door, but this would not be confirmed until 2005.
Since his departure, McLaren won the 2008 drivers' title with Lewis Hamilton, and should have won the double in 2007 but threw the drivers' away and was booted out of the constructors' for spy-gate.
After winning races through the early 2010s, a rot began in 2013, that culminated in the nadir of the Honda years and rock-bottom for a team towards the end of the decade.
It was only in mid-2023 that McLaren began an upward curve that ended with the team landing its first constructors' since Newey's time in 2024.
Red Bull
Newey was last seen on the Red Bull pit-wall at the Miami Grand Prix, having made the decision to leave during the Japanese GP weekend last April.
Max Verstappen would go onto win the Emilia-Romagna, Canadian and Spanish Grands Prix, but the RB20 suffered an alarming dip in form during the summer and early autumn, with Red Bull seemingly having no clear answers to the car's lack of pace.
It did rally enough to secure Verstappen the title late on, but the RB21 of 2025 requires major surgery, with the team still scratching their heads over what exactly to do to rectify the issues with balance and kerb-riding.
The challenge is on for technical director Pierre Wache to lead the team forward in the post-Newey era.
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