Cars with a plastic body: a list of models, pros and cons

Searching for information about which cars have a body made of plastic is often driven by the desire to find a vehicle that is resistant to corrosion. Owners of such machines are less likely to face the problem of rust on the thresholds and arches, which is especially important for regions with aggressive winter reagents. However, it is important to immediately make clear: fully plastic cars mass production almost does not exist, we are talking about composite panels mounted on a metal frame.

The technology of using polymeric materials in the automotive industry has been going on for several decades and has gone from experimental concepts to mass production of SUVs. Plastic elements Bodywork, such as bumpers, wings or even entire sections, have unique elastic properties. They are able to withstand deformation in low-speed shocks, returning to their original shape, which is impossible for traditional steel or aluminum.

In this article we will compile a detailed list of models where plastic was used most extensively, analyze the technical features of materials and answer the question of whether it is worth looking for such a machine on the secondary market. Understanding the structure of the body will help you make an informed decision when buying and properly maintain the car in the future.

Production technologies and types of materials

When talking about cars with a plastic body, most often mean the use of various types of polymer composites. The most common material is ABS plasticwhich is used for bumpers and decorative overlays. However, for load-bearing or large body panels such as wings, hoods and even doors, stronger compounds are used, often reinforced with fiberglass or carbon fiber.

One of the key technologies is injection molding or vacuum molding, which allows you to create parts of complex geometry without many welds. This not only reduces the weight of the car, but also improves aerodynamic performance. Composite panels They are not susceptible to electrochemical corrosion, which is their main advantage over steel, although they can burn out in the sun or crack in severe frost and impact.

⚠️ Note: Despite the absence of rust, plastic body panels can lose geometry when overheated (for example, during painting) or become brittle at extremely low temperatures. Do not use aggressive chemicals to clean such surfaces.

There's also technology. RTM (Resin Transfer Molding), in which the resin is fed into a closed form with the reinforcement material already laid. This allows for smooth surface parts on both sides, which is often used in premium sports cars and specialized equipment. Such materials provide high strength with minimal weight, but their repair requires special knowledge and equipment.

Why not make a fully plastic car?

The fully plastic body has a low twisting rigidity compared to the metal safety frame. In addition, the cost of producing large composite parts is high, and recycling such cars is more difficult. Therefore, plastic is used for hinged panels, and the power frame is made of steel.

Full list of popular models with plastic body elements

Analysis of the automotive market allows us to identify a number of models, where the manufacturer went on experiments with body materials. This is often the case for SUVs, where cross-country and damage resistance are important. Below is a list of cars that are most famous for using plastic in body design.

• 🚙 Lada Niva (VAZ-2121, 21213, 21214, Niva Legend) - the legendary domestic SUV, whose wings were originally made of fiberglass. This was done to reduce weight and simplify production, although over time AvtoVAZ switched to metal and then returned to plastic in some versions.
• 🚜 Renault Duster (first generation) In early versions of this popular crossover, the front wings were made of polypropylene. This allowed them to easily restore shape after dents, but complicated the quality of painting due to the elasticity of the material.
• 🏎️ Pontiac Fiero One of the most famous examples of a mass-produced car with a body made entirely of plastic panels worn on a steel space frame. It was an experiment of the 80s, aimed at reducing the weight of a sports car.
• 🏜️ Reliant Kitten / Robin Three-wheeled cars, widely known for the show "Top Gear". Their body is made entirely of fiberglass, which made them light, but prone to rolling over.

Special attention should be paid to modern electric vehicles and concepts, such as: BMW i3. The safety frame of this car is made of carbon fiber, which makes it incredibly durable and lightweight. Although not a “plastic” in the everyday sense, technologically it is a polymer composite, which represents the pinnacle of the evolution of materials in the automotive industry.

Domestic experience: AvtoVAZ and plastic Niva

History of the use of plastic on VAZ-2121 This is a very interesting and special chapter in the automotive industry. Initially, the designers chose fiberglass for the front wings to save on expensive stamping and reduce the overall weight of the machine. Owners of the "Niv" well know that these wings do not crumple when hit, but crack or just bounce, which for the SUV is more a plus than a minus.

However, over time, the technology has changed. At different periods of production, AvtoVAZ experimented with metal, but in the end on models. Niva Legend and Niva Travel Plastic elements have reappeared. For example, on the "Niva Travel" front wings again became plastic, and bumpers and door linings are made of unpainted polymer, resistant to scratches.

Model	Wing material	Years of plastic production	Features
VAZ-2121 (Classic)	Plastic glass	1977 to 1990s	Required reinforcement, often cracked
VAZ-21213 / 21214	Steel	1990s - 2020	Corrosion, easily crumpled
Niva Legend / Travel	Polypropylene/Plastic	2020 - A.D.	Elastic, not rusting, difficult to paint

Repairing these wings has its own specifics. Unlike metal, they cannot be simply pulled with a hammer. For recovery, soldering with a special dryer with solder of the same material is used or gluing with epoxy compounds with a reinforcement mesh. The main advantage of plastic wings of Niva is the absolute absence of corrosion in the arch space, which prolongs the life of spars.

Foreign analogues and rare specimens

Abroad, plastic experiments have often been used to reduce weight to improve performance or fuel efficiency. Pontiac Fiero It was the first two-seater sports car in the United States with a medium-range engine and a thermoplastic body. The body panels did not carry loads, but were attached to a steel frame. This made it easy to change the color of the car, simply by replacing the hinged parts.

The French car industry has also been noted in this area. Renault Duster The first generation received plastic front wings, which, when parking contacts with columns or branches of trees, did not leave dents. This decision was highly appreciated by owners who use the car in urban conditions and on easy off-road. Later, in the restyled versions, this idea was partially abandoned in favor of unification of production.

⚠️ Note: When buying a used car with plastic wings (for example, Renault Duster), carefully check the mounting places. The plastic tans over time, and the attachment points to the metal frame can burst, which will lead to rattling or tearing off the element at speed.

It is also worth mentioning microcars like this. Smart Fortwo. Although their body panel ("Tridion") is made of steel, many of the hinged elements and panels are made of thermoplastic, painted in mass. This means that small scratches on them are almost invisible, since the color is the same on the surface and in the depth of the material.

Pros and cons of operating a plastic body

Operation of the car with composite body elements has its pronounced features. On the one hand, the driver receives protection from the main enemy of the metal - rust. On the other hand, new risks are emerging, related to the physicochemical properties of polymers. Let’s look at the main aspects of owning such a car.

• ✅ Corrosion resistance - plastic never rusts. Arches, rapids and wings remain intact even when the paint is chipped, which is critical for regions with humid climates.
• ✅ Elasticity In light impacts (up to 5-7 km / h), the plastic bumper or wing can simply be soaked and aligned back without requiring repair.
• ❌ Difficulty painting Plastic has a high temperature expansion coefficient. The usual hard car paint on it will crack quickly. Special elastic enamel and adhesive soils are required.
• ❌ Ageing of material - under the influence of ultraviolet light, unpainted plastic grays, becomes matte and fragile. Regular treatment with protective compounds is required.

Another important aspect is safety. The metal body with a strong impact absorbs energy due to deformation (crumpled). Plastic can simply split into sharp pieces or, conversely, transfer the energy of the impact further to the power frame if it is not elastic enough. Therefore force-piece They are almost always metallic.

Repair and restoration of plastic parts

Recovery of plastic body elements is a process that requires specific skills. If the metal can be splashed almost anything, then special compositions are needed for plastic. Putty should have high adhesion to polymers and, most importantly, elasticity. A regular putty on a polyester basis on a flexible wing Duster or Niva will crack after a couple of months of operation.

The brazing method is used to repair cracks. With a construction hair dryer or special soldering iron for plastic, the edges of the cracks are melted and joined, often with the addition of a solder bar made of a similar material. To strengthen the seam on the back side, a reinforcement mesh is often applied, which is also melted into the body of the parts.

Procedure for repairing the crack:
1. Clear the area around the crack.
2. Then, make sure that the edges of the crack are not further away.
3. Heat the hair dryer and weld the edges.
4. Apply elastic adhesive soil.
5. Apply a stretch putty.
6. Paint acrylic enamel with plasticizer.

If the part has a complex shape or the damage is extensive, the method of forming a new part on top of the surviving part or manufacturing a matrix is used. However, in the conditions of conventional service, the replacement of an element with a new one is most often made, since the labor cost (cost of work) for the restoration of a complex composite can exceed the cost of a new spare part.

Care for unpainted and stained plastic

Owners of cars with a large number of plastic elements (especially unpainted, black) often face the problem of their burnout and the appearance of whitish plaque. Solar ultraviolet light breaks down long polymer chains, and plastic loses its deep black color, becoming gray and rough. To prolong the life of such elements, regular care is necessary.

For color restoration and protection, there are special compositions - "inks" or restorers of plastic. They are water-based (wash after a pair of sinks) and silicone or polymer-based (hold longer). For long-term effect, it is better to use ceramic compounds for plastic or special varnishes that create a durable film.

When washing a car, it is important not to use hard brushes and aggressive solvents (such as acetone or gasoline) to remove bitumen stains from plastic parts. These substances can dissolve the top layer of plastic, leaving unavoidable matte spots. For cleaning, it is better to use specialized bitumen cleaners marked "Safe for plastics".

What is the best way to wash unpainted black plastic?

It is best to use special shampoos for cars with a matte body or black plastic. They do not contain aggressive surfactants and waxes that can leave divorces. After washing, it is recommended to apply air conditioning for plastic with a UV filter, which will protect the material from burnout.

Can I paint a plastic wing in body color?

Yes, you can, but it requires technology. It is necessary: (1) To wrap the surface. 2) Defatize. (3) Apply special adhesive soil for plastic (transparent and sticky). (4) Apply acrylic filler soil. (5) Paint with base and varnish. Without adhesive soil, the paint will peel over in pieces at the first wash or heating.

Is it true that plastic wings of the Niva are worse than metal?

No, not worse, just different. They do not rot, which for Niva, often running through mud and reagents, is a huge plus. They are lighter, which slightly reduces fuel consumption and suspension load. Cons – they can crack on a strong impact, rather than crumple, and they are more difficult to paint quality due to the flexibility of the material.

How to determine what material is made of the part?

Look at the inside of the detail. There should be a marking in the form of an abbreviation: PP (polypropylene), ABS (ABS plastic), PUR (polyurethane), PA (polyamide). The choice of repair materials depends on this. A test can also be done: Plastic is usually warmer to the touch than metal and is not magnetized.