Vehicle Description

2003 BMW M5 – Dinan S2 | Imola Red | 6-Speed | 87k Miles

DESCRIPTION:

Offered here is one of the most comprehensively documented and purpose-built E39 M5s you will find — a 2003 BMW M5 finished in Imola Red (405) over black Nappa leather, fitted from new with the Dinan S2 performance package by an authorized BMW dealer, and maintained with service records dating back to 2003.

The Dinan S2 Package

In April 2003 — immediately after leaving the factory — this car was taken to Brecht BMW of Escondido, California, where the complete Dinan S2 transformation was performed. This is not an aftermarket tune; it is a dealer-installed, documented performance package that includes:

• Stage 5 Dinan engine management software

• Cold-air intakes with performance mass air flow meters

• Individual performance throttle bodies with velocity stacks

• Exhaust headers and full stainless-steel exhaust system

• Revised front and rear suspension with strut tower braces (front and rear)

• 3.45:1 Dinan limited-slip differential

• 18? forged Dinan Performance wheels

The result is a meaningfully stronger and sharper S62 V8 — already one of the greatest naturally aspirated engines ever fitted to a road car — with individual throttle bodies and double-VANOS working in concert with Dinan's calibration.

Drivetrain & Mechanical

Power is routed through a Getrag six-speed manual transmission — the correct and only acceptable gearbox for this car. A comprehensive mechanical refresh was completed in 2019, including:

• Clutch replacement

• Rear main seal

• Driveshaft flex disc

• Transmission mounts

• Differential output shaft seals

• Valve cover gaskets

• Serpentine and accessory drive belts

Additional work in 2024 addressed the oil pan gasket and a power steering hose. The BeastPower rear anti-sway bar brackets have been installed, and the car rides on 275/35 Michelin Pilot Sport 4S tires.

Exterior

Imola Red with Shadowline trim is among the most sought-after color combinations on the E39 platform. The car features xenon headlights with washers, fog lights, a glass sunroof, a trunk lid spoiler, and quad exhaust outlets. Paint correction and touch-up work was performed by Enthusiast Auto Group (EAG) of Cincinnati, Ohio, in 2013, addressing road rash on the hood, front bumper, and front fenders. Close-up photos of current paint condition are available — the car presents well but is honestly represented.

Interior

The cabin is trimmed in black with aluminum-look accents throughout. Replacement power-adjustable heated front sport seats in Black Nappa Point leather were installed in 2013. Additional features include:

• GROM Audio infotainment system with Apple CarPlay and Android Auto

• Short-throw shifter with weighted ZHP shift knob

• Dual-zone automatic climate control

• Dinan-embroidered floor mats

• Rear window sunshades

• Lo-Jack anti-theft system

• Passport SRX radar detector and laser jammer

• M-branded 185-mph speedometer with variable-redline tachometer

Note: the steering wheel is a replacement unit; there are wrinkles on the left-front door panel trim.

Documentation

This car comes with owner's manuals, BMW literature, Dinan literature, two keys, and continuous service records since 2003. The Carfax report shows no accidents or reported damage. Title is clean.

The Bottom Line

The E39 M5 is widely regarded as one of the last truly analog driver's BMWs — high-revving, naturally aspirated, six-speed manual, no electrified assistance. This example takes that formula further with a factory-authorized Dinan S2 build documented from day one, a thorough mechanical history, and one of the best color combinations available. Cars like this, with this level of provenance, are becoming genuinely difficult to find.