The 2003 Rolex 24 at Daytona was a Grand-Am Rolex Sports Car Series 24-hour endurance sports car race held on February 1–2, 2003 at the Daytona International Speedway road course. The race served as the first round of the 2003 Rolex Sports Car Series. The race saw the debut of the Daytona Prototype as the new top class of the series. However, the new cars proved only marginally faster than the lower classes and suffered frequent mechanical failures during the race, allowing a car from the GT class to take overall victory. Overall victory and victory in the GT class went to the No. 66 Porsche 996 GT3-RS from The Racer's Group, driven by Kevin Buckler, Michael Schrom, Jörg Bergmeister, and Timo Bernhard. The Daytona Prototype class was won by the No. 88 Multimatic MDP1 from Multimatic driven by Scott Maxwell, David Brabham, and David Empringham. The SRP II class was won by the No. 5 Lola-Nissan from Team Seattle/Essex Racing, driven by Ross Bentley, Don Kitch Jr., Joe Pruskowski, and Justin Pruskowski. Finally, the GTS class was won by the No. 24 Mosler MT900 from Perspective Racing, driven by Jérôme Policand, Michel Neugarten, João Barbosa, and Andy Wallace.

Race results

Class winners in bold.

Pos	Class	No	Team	Drivers	Chassis	Tire	Laps
					Engine
1	GT	66	The Racer's Group	Kevin Buckler Michael Schrom Timo Bernhard Jörg Bergmeister	Porsche 996 GT3-RS	D	695
					Porsche 3.6 L Flat-6
2	GT	35	Risi Competizione	Ralf Kelleners Anthony Lazzaro Johnny Mowlem	Ferrari 360 Modena GT	D	686
					Ferrari 3.6 L V8
3	GT	83	Rennwerks Motorsports	David Murry Dave Standridge Johannes van Overbeek Richard Steranka	Porsche 996 GT3-R	D	684
					Porsche 3.6 L Flat-6
4	DP	88	Multimatic	Scott Maxwell David Brabham David Empringham	Multimatic MDP1	G	679
					Ford 5.0 L V8
5	DP	59	Brumos Racing	J. C. France Hurley Haywood Scott Goodyear Scott Sharp	Fabcar FDSC/03	G	661
					Porsche 3.6 L Flat-6
6	GT	43	Orbit Racing	Peter Baron Leo Hindery Marc Lieb Kyle Petty	Porsche 996 GT3-RS	D	656
					Porsche 3.6 L Flat-6
7	SRP II	5	Team Seattle/Essex Racing	Ross Bentley Don Kitch Jr. Joe Pruskowski Justin Pruskowski	Lola B2K/40	D	652
					Nissan 3.0 L V6
8	SRP II	15	Team Seattle/Essex Racing	Wade Gaughran Steve Gorriaran Peter MacLeod Dave Gaylord	Lola B2K/40	D	648
					Nissan 3.0 L V6
9	GTS	24	Perspective Racing	Jérôme Policand João Barbosa Michel Neugarten Andy Wallace	Mosler MT900 R	G	641
					Chevrolet 5.7 L V8
10	GTS	46	Morgan-Dollar Motorsports	Charles Morgan Lance Norick Jim Pace Rob Morgan	Chevrolet Corvette	G	639
					Chevrolet 5.5 L V8
11	GT	34	Ferri Competizione	Mauro Baldi Justin Keen Eric van de Poele Ryan Hampton	Ferrari 360 Modena GT	D	638
					Ferrari 3.6 L V8
12	GTS	31	Rollcentre Racing	Richard Stanton Rob Barff Andy Britnell Rick Sutherland	Mosler MT900 R	G	635
					Chevrolet 5.7 L V8
13	GT	69	Marcus Racing	Brian Cunningham Hugh Plumb Cory Friedman Craig Stanton	BMW M3	D	633
					BMW 3.2 L I6
14	GT	20	JMB Racing	Augusto Farfus Emmanuel Collard Max Papis Andrea Garbagnati	Ferrari 360 Modena	D	621
					Ferrari 3.6 L V8
15	GTS	30	Rollcentre Racing	Martin Short Tom Herridge John Burton David Shep	Mosler MT900 R	G	601
					Chevrolet 5.7 L V8
16	GTS	7	Konrad Motorsport	Franz Konrad Toni Seiler Airton Daré Jean-François Yvon	Saleen S7-R	G	600
					Ford 6.0 L V8
17	GT	49	Pit Bull/MAC Racing	Bepo Orlandi Michele Merendino Derek Clark Ron Atapattu	Porsche 996 GT3-RS	D	595
					Porsche 3.6 L Flat-6
18 DNF	SRP II	21	Archangel Motorsport Services	Larry Oberto Chris Bingham Derrike Cope Brian DeVries	Lola B2K/40	D	589
					Nissan 3.0 L V6
19	GT	44	Orbit Racing	Mike Fitzgerald Manuel Matos Joe Policastro Joe Policastro Jr.	Porsche 996 GT3-RS	D	566
					Porsche 3.6 L Flat-6
20 DNF	SRP II	97	Lucchini Engineering	Mirko Savoldi Piergiuseppe Peroni Filippo Francioni	Lucchini SR2002	D	548
					Nissan 3.0 L V6
21	GTS	09	Flis Motorsports	Doug Goad Paul Menard Paul Mears Jr. Jim Briody	Chevrolet Corvette	G	542
					Chevrolet 6.2 L V8
22 DNF	GT	68	The Racer's Group	Jim Michaelian R. J. Valentine Tom Hessert Jr. Tom Hessert III	Porsche 996 GT3-R	D	501
					Porsche 3.6 L Flat-6
23 DNF	GT	03	Marcos USA	Cor Euser Rob Knook Donny Crevels Peter van der Kolk	Marcos Mantis Plus	D	465
					Ford 4.6 L V8
24	DP	8	G&W Motorsports	Dieter Quester Boris Said Darren Law Luca Riccitelli	Picchio DP2	G	451
					BMW 4.9 L V8
25 DNF	DP	3	Cegwa Sport	Darius Grala Oswaldo Negri Jr. Josh Rehm Guy Cosmo	Fabcar FDSC/03	G	403
					Toyota 4.3 L V8
26 DNF	GTS	19	ACP Motorsports	Anthony Puleo Kerry Hitt Robert Dubler Mark Kennedy	Chevrolet Corvette	G	391
					Chevrolet 6.1 L V8
27 DNF	GTS	05	RE/MAX Racing	Craig Conway John Metcalf Rick Carelli Dave Linger	Chevrolet Corvette	G	378
					Chevrolet 6.2 L V8
28 DNF	GTS	77	RWS Motorsport	Alexey Vasilyev Tetsuya Tanaka Nikolai Fomenko Walter Lechner Jr.	Porsche 996 GT3-R	G	361
					Porsche 3.6 L Flat-6
29 DNF	GT	99	NETTTS Racing	Jim Hamblin Barry Brensinger James Nelson Mark Greenberg	Porsche 996 GT3-RS	D	316
					Porsche 3.6 L Flat-6
30 DNF	GTS	40	Derhaag Motorsports	Justin Bell Derek Bell Ken Wilden Simon Gregg	Chevrolet Corvette	G	260
					Chevrolet 6.1 L V8
31 DNF	GT	33	Scuderia Ferrari of Washington	Cort Wagner Brent Martini Sylvain Tremblay Selby Wellman	Ferrari 360 Modena GT	D	214
					Ferrari 3.6 L V8
32 DNF	GT	73	Graham Nash Motorsport	Rob Wilson Mike Newton David Gooding Martyn Konig	Porsche 996 GT3-R	D	211
					Porsche 3.6 L Flat-6
33 DNF	GT	10	MAC Racing	David Terrien Gianluca de Lorenzi Didier Moinel Delalande Marco Saviozzi	Porsche 996 GT3-R	D	206
					Porsche 3.6 L Flat-6
34 DNF	DP	58	Brumos Racing	David Donohue Mike Borkowski Randy Pobst Chris Bye	Fabcar FDSC/03	G	160
					Porsche 3.6 L Flat-6
35 DNF	GT	67	The Racer's Group	Andrew Davis Robert Julian Tom Nastasi Dave Lacey	Porsche 996 GT3-RS	D	151
					Porsche 3.6 L Flat-6
36 DNF	GT	98	Schumacher Racing	Sascha Maassen Martin Snow Lucas Luhr Larry Schumacher	Porsche 996 GT3-RS	D	135
					Porsche 3.6 L Flat-6
37 DNF	SRP II	80	G&W Motorsports	Shawn Bayliff Steve Marshall Robert Prilika Andy Lally	Picchio D-USA	D	121
					BMW 3.0 L I6
38 DNF	GT	57	Seikel Motorsport	Alex Caffi Gabrio Rosa Fabio Rosa Andrea Chiesa	Porsche 996 GT3-RS	D	101
					Porsche 3.6 L Flat-6
39 DNF	DP	54	Bell Motorsports	Didier Theys Forest Barber Terry Borcheller Christian Fittipaldi	Doran JE4	G	67
					Chevrolet 5.5 L V8
40 DNF	GT	22	JMB Racing	Stephen Earle Philip Shearer Stéphane Grégoire Ludovico Manfredi	Ferrari 360 Modena	D	54
					Ferrari 3.6 L V8
41 DNF	GTS	48	Heritage Motorsports	Tommy Riggins David Machavern Kevin Lepage Scott Lagasse	Ford Mustang	G	49
					Ford 5.9 L V8
42 DNF	GTS	18	Boston Motorsports Group	Ken Stiver Scott Deware Don Bell Jeff Kline	Mosler MT900 R	G	14
					Chevrolet 5.7 L V8
43 DNF	GTS	6	Gunnar Racing	Gunnar Jeannette Duncan Dayton Peter Kitchak Ronald Zitza	Porsche 911 GT1	G	9
					Porsche 3.6 L Flat-6
44 DNF	GTS	51	Proton Competition	Mauro Casadei Christian Reid Gerold Reid Manfred Jurasz	Porsche 911 GT2	G	2
					Porsche 3.6 L Turbo Flat-6
DNS	GT	61	System Force Motorsports	Peter van Merksteijn Sr. Charles Brugman Frans Munsterhuis Cougar Jacobsen	Porsche 996 GT3-RS	D	-
					Porsche 3.6 L Flat-6