Smart Roadster body kit options fall into three broad categories: genuine Brabus factory styling components, official Smart accessories fitted at the dealership, and aftermarket kits from independent manufacturers. Fitment varies by variant, and not all aftermarket panels are compatible across the 45kW, 60kW and Brabus models without modification.
The Smart Roadster 452 is one of those rare cars where the factory styling was genuinely adventurous enough to spawn a healthy aftermarket scene. Produced between 2003 and 2006, with roughly 43,000 units built worldwide, the Roadster was designed with bold, curvaceous bodywork from the outset — and Brabus went further still with deeper bumpers, distinctive side skirts and a rear diffuser treatment that transformed the car’s stance. Today, whether you want the authentic Brabus look, a widebody transformation or a more subtle aero upgrade, the options exist. This guide covers all of them honestly, including what fits, what doesn’t, and where buyers commonly go wrong.
What Does a Genuine Brabus Smart Roadster Body Kit Include?
The factory Brabus body kit was developed by Brabus GmbH in partnership with Smart and fitted either at the factory or as a genuine dealer-installed option. It comprises a deeper front bumper with integrated air dam, extended side skirts that run the full length of the sill, and a reshaped rear bumper with a subtle diffuser section. The Brabus rear also features twin exhaust outlets positioned centrally, which distinguishes it immediately from the standard car’s offset single pipe.
The Brabus front bumper sits noticeably lower than the standard item and incorporates larger fog light surrounds. In profile, the side skirts reduce the visual gap between the body and the road by around 20–25mm, giving the car a planted, purposeful appearance without lowering the suspension. All genuine Brabus body panels are finished in the same Tridion-compatible plastics as the standard car and are designed to accept the same clip and bolt fixings, making installation straightforward for a competent bodyshop.
To understand the full scope of what Brabus changed on the 452 — not just cosmetically but mechanically — our detailed breakdown of what the Brabus bodywork actually changes is essential reading before you spend money on second-hand parts.
Official Smart Accessory Styling Packs
Separate from the full Brabus kit, Smart offered its own official styling accessories through the dealer network during the production run. These included front lip spoilers, side skirt extensions and rear aprons in a range of colours designed to contrast or match the Tridion safety cell. The quality of these OEM accessories is high — they were produced to the same manufacturing standards as the body panels — but they offer a considerably more subtle visual change than the full Brabus conversion.
New old stock (NOS) of these parts is now extremely rare, and condition varies significantly among used examples found on auction sites or from breakers. Mounting points are specific to the standard 60kW coupe or roadster body, so owners must confirm compatibility carefully. One recurring frustration is that some dealer accessories were only certified for the coupe body, not the soft-top roadster, and the panel curvature differs enough to prevent interchangeability.
Aftermarket Smart Roadster Body Kits: What the Independent Market Offers
The aftermarket has produced a range of smart roadster body kit options that go considerably further than anything offered by the factory. The most popular category is the widebody kit, which typically adds flared wheel arches front and rear to accommodate wider track and larger wheels. These kits are usually manufactured in fibreglass or polyurethane, each with distinct trade-offs.
Fibreglass Kits
Fibreglass is the traditional choice for low-volume custom bodywork. It is rigid, relatively easy to paint and accepts standard automotive primers without special preparation. The downside is brittleness: minor parking impacts that a standard bumper would shrug off can crack a fibreglass panel. Most fibreglass kits add 40–60mm of width per side, requiring wheel spacers or wider offset alloys to fill the arches properly. Quality varies enormously between suppliers; some kits require significant fettling before fitment, while others arrive ready to prime and paint.
Polyurethane Kits
Polyurethane (PU) offers greater flexibility and impact resistance than fibreglass, making it better suited to a daily-driven Roadster. It is the material used by Brabus for the original factory kit, which is worth noting. PU panels are heavier and can be slightly more difficult to paint without specialist adhesion promoters, but they will flex rather than crack in minor impacts. The downside of many aftermarket PU kits is that the material quality varies, and cheaper versions can warp in high heat or if stored incorrectly before fitting.
Carbon Fibre and Composite Parts
A small number of suppliers produce individual carbon fibre aero components for the 452, typically splitters, canards and boot lid spoilers rather than full kit replacements. Genuine carbon fibre is expensive but adds negligible weight. Dry carbon parts are occasionally available from specialist fabricators. Most ‘carbon look’ parts sold cheaply online are ABS plastic with a carbon-effect wrap or gel coat — visually convincing at a distance but structurally identical to plain plastic.
FITMENT WARNING
Not All Kits Fit All Variants: Check Before You Buy
The Smart Roadster was produced as both a coupe and soft-top roadster, and body panel curvature differs between them. Additionally, the Brabus model has unique front and rear bumper mounting points that are incompatible with standard 60kW fixtures in some areas. Always confirm the exact body style and variant your kit was designed for.
- Coupe vs Roadster — soft-top cars have different rear quarter geometry
- Brabus bumpers — mounting points differ from the standard 60kW at the rear
- Widebody arches — require wheel offset changes, not just wider tyres
- Rear diffusers — must clear the exhaust routing and tow eye recess
Widebody Kits and Stance Builds on the Smart Roadster 452
The widebody scene around the 452 is niche but active, particularly in Germany and Japan where the car attracted a strong custom following. A full widebody transformation typically involves replacing the front and rear bumpers, adding flared arch extensions that are either bonded or bolted to the existing bodywork, and fitting side skirts that integrate with the new arch line. The result, when executed well, is visually dramatic — the Roadster’s proportions lend themselves naturally to the widebody treatment.
The practical implications deserve honest attention, however. Wider arches mean wider wheels and tyres are required to avoid an empty-arch appearance, and this in turn affects handling, gearing and potentially the Softouch gearbox’s behaviour under load. A lowered stance is usually desired to complement the wider body, which affects ride quality on UK roads. If you are considering a full widebody build alongside a performance upgrade, understanding how each variant’s mechanicals differ will help you choose the right base car before spending money on body modifications.
Fitting a Smart Roadster Body Kit: Practical Considerations
Installation difficulty depends heavily on the type of kit and the quality of manufacture. Genuine Brabus and OEM Smart parts bolt directly to existing mounting points and require no modification to the bodyshell. Aftermarket kits, particularly fibreglass widebody conversions, almost always need some adjustment: trimming, re-drilling, and in some cases filling gaps with mesh or foam backing before the outer surface can be painted.
Paint matching is the most commonly underestimated challenge. The Roadster’s Tridion safety cell is a different colour to the body panels on most cars, and those body panels are themselves colour-coded. Aftermarket parts arrive either unpainted (common for fibreglass) or in a generic primer, so professional paint preparation and application is essential. Budget for this separately from the kit cost. A poor paint match will undermine even the best-quality bodywork and is the most common reason that otherwise well-executed custom builds look unfinished in photographs.
If you are undertaking a full exterior transformation, it is worth considering the interior at the same time. Many owners who invest in exterior styling also upgrade the cockpit — the options for Recaro and sport seat fitment in the 452 are more varied than most people expect and complement a properly finished exterior build nicely.
Sourcing Parts: New, Used and Reproduction
Genuine Brabus and Smart body parts for the 452 are no longer in production. The primary sources for OEM components are now specialist breakers, online auction platforms, and Smart Roadster enthusiast forums where owners sell parts from cars being broken. Condition and completeness vary, and it is common to find Brabus bumpers with cracks, missing clips or resprays that do not match the factory finish.
Reproduction parts have begun to appear from small manufacturers, particularly for the Brabus front bumper which is the most sought-after individual piece. Quality varies considerably. Some reproduction items are dimensionally accurate and accept standard fixings; others require modification. The safest approach is to buy from suppliers who allow returns and can provide reference photographs of the part fitted to an actual 452, not just a render or stock image.
For independent aftermarket kits, a number of small European and Asian manufacturers list products compatible with the 452. Research into forum build threads from verified owners who have fitted the specific kit you are considering is the most reliable due diligence available. Our comprehensive buyer’s guide to widebody, Brabus styling and aftermarket aero covers specific supplier options and real-world fitment reports in detail.
For further reference on Brabus’s engineering history with the 452, the official Brabus website provides background on the partnership with Smart, and the Smart Roadster Wikipedia entry includes production and variant information useful for cross-referencing part compatibility. Enthusiast communities such as Smart Car of America Forums carry years of documented body kit fitment experience from owners worldwide.
Frequently Asked Questions
Will a Brabus body kit fit a standard 60kW Smart Roadster?
The Brabus front bumper and side skirts can be fitted to the standard 60kW body with minor modification, as the basic mounting points are shared. The rear bumper is more complex due to the twin exhaust routing. Professional fitting is strongly recommended, and you should expect some adjustment work even with genuine Brabus parts.
Are aftermarket Smart Roadster body kits road legal in the UK?
Body kits themselves are not subject to type approval in the UK, but any modification that affects lighting positions, number plate visibility or pedestrian safety standards could fail an MOT. Ensure all lights remain unobstructed and the number plate is clearly visible. Lowered ride height from under-body aerodynamic additions may also cause MOT failures if ground clearance is insufficient.
What is the difference between the Brabus coupe and roadster body panels?
The Brabus coupe has a fixed hardtop roofline and different rear quarter panel geometry compared to the soft-top roadster. Body panels below the waistline — bumpers, skirts, sills — are generally interchangeable, but rear arch and roof-adjacent panels are unique to each body style. Always confirm with the seller which variant the parts were removed from.
How much does a full Smart Roadster body kit transformation cost?
Costs range widely. A genuine second-hand Brabus front bumper alone typically costs £150–£400 depending on condition. A complete aftermarket widebody kit in fibreglass starts at around £600–¡900 before paint. Professional fitting and a quality respray can add £1,500–3,000 or more, making full transformations a significant investment on a car of the Roadster’s value.
