Body metal thickness by car brand: table with expert comments

When you choose a car - new or used - the thickness of the body metal becomes one of the key criteria for durability. This parameter determines how quickly the first pockets of corrosion appear, how resistant the body is to dents and deformations during an accident, and also how many years the car will last without major repairs. However, manufacturers rarely advertise this data: in the technical specifications you will find engine power or fuel consumption, but not the thickness of the steel sheet on the roof or sills.

In this article we have collected current data on body metal thickness for popular car brands (from budget Lada and Renault up to bonus Mercedes-Benz and Volvo), we explained why this indicator varies even for one model, and explained how to independently measure the thickness of the metal before purchasing. You will also find out which body elements are traditionally thinner than others, and why modern cars with aluminum or composite bodies can be stronger than steel with less sheet thickness.

Why the thickness of body metal is important for the buyer

The thickness of the metal directly affects three key aspects:

• 🔹 Corrosion resistance: the thinner the sheet, the faster rust eats through it. For example, thresholds 0.6 mm thick can rust within 3–4 years of active use in Russian winter conditions, while 1.2 mm metal will last 2–3 times longer.
• 🔹 Resistance to mechanical damage: thin metal is more easily deformed by impacts (for example, from flying stones or bad parking). This leads to frequent dents in the hood or doors.
• 🔹 Safety in case of accidents: thick power elements (spars, struts) better absorb impact energy, protecting passengers. In budget cars, these parts are often thinner, which worsens crash tests.

At the same time thickness ≠ strength. Modern cars use high-strength steels (e.g. BH210 or DP590), which, with a thickness of 0.7–0.8 mm, can withstand loads no worse than ordinary steel with a thickness of 1.0–1.2 mm. But such materials are more expensive, so they are used mainly in premium or sports models.

⚠️ Attention: Manufacturers often skimp on “invisible” body elements (for example, interior door reinforcements or rear fenders), making them thinner than the hood or roof. When inspecting a used car, be sure to check all areas with a thickness gauge, not just visible panels.

Table of body metal thickness by car brand (2026)

Below are the average metal thickness values for key body elements (hood, roof, doors, sills, side members) for popular brands. The data is based on measurements from independent experts and analysis of damaged vehicles. Please note that values ​​may vary depending on model, year of manufacture and equipment.

Car make	Hood	Roof	Doors	Thresholds	Spars
Lada Vesta/Grant	0.7–0.8 mm	0.7 mm	0.6–0.7 mm	0.8–1.0 mm	1.2–1.5 mm
Renault Duster/Logan	0.7–0.8 mm	0.7 mm	0.6–0.7 mm	0.9–1.1 mm	1.3–1.6 mm
Volkswagen Polo/Golf	0.8–0.9 mm	0.8 mm	0.7–0.8 mm	1.0–1.2 mm	1.4–1.8 mm
Toyota Corolla/Camry	0.8–1.0 mm	0.8–0.9 mm	0.7–0.9 mm	1.1–1.3 mm	1.5–2.0 mm
Mercedes-Benz C-Class/E-Class	0.9–1.1 mm	0.9–1.0 mm	0.8–1.0 mm	1.2–1.5 mm	1.8–2.5 mm

Please note: premium brands (for example, Mercedes-Benz or Volvo) the thickness of the side members and sills can reach 2.0–2.5 mm, whereas in budget models (Lada, Datsun) these elements rarely exceed 1.2–1.5 mm. Also in the latest generations of many cars they use sheets of different thicknesses - for example, the hood can be thinner in the center (0.7 mm) and thicker at the edges (0.9 mm) to improve rigidity.

How manufacturers save on metal thickness

Reducing the thickness of body panels is one of the main ways to reduce vehicle weight and save on materials. Manufacturers use several tricks:

• 📉 Local thinning: for example, internal door panels are made thinner than external ones (0.5–0.6 mm versus 0.7–0.8 mm).
• 🔄 Replacing steel with aluminum: in premium models (for example, Audi A8 or Jaguar XE) aluminum panels with a thickness of 1.0–1.2 mm replace steel 0.8–1.0 mm, maintaining strength with less weight.
• 🧲 Use of high strength steels: brands DP780 or Martensite allow you to reduce the thickness by 20–30% without loss of rigidity.
• 🔧 Simplification of design: For example, eliminating internal reinforcements in the trunk or roof.

They save a lot on budget models for emerging markets (including Russia). For example, Renault Logan for Europe it has thresholds with a thickness of 1.1 mm, and for the CIS countries - 0.9 mm. A similar situation with Hyundai Solaris: The Korean version is equipped with thicker spars than the “Russian assembly”.

⚠️ Attention: When buying a used car with a mileage of more than 100 thousand km, pay attention to the condition of the sills and arches. If their thickness was initially less than 1.0 mm, then after 5–7 years of operation they will almost certainly begin to corrode, even if no rust is visible from the outside.

Which models have the thinnest metal?

According to research from 2023–2026, the record holders for thin metal are Datsun mi-DO/on-DO (thresholds 0.7 mm), Lada Granta (doors 0.6 mm) and Chery Tiggo 2 (roof 0.65 mm). At the same time Toyota Land Cruiser 200 and Mercedes-Benz G-Class maintain the thickness of the side members at the level of 2.0–2.5 mm even in new generations.

How to measure the thickness of the body metal yourself

To check the thickness of the metal use thickness gauges (ultrasonic or magnetic). Here are the step-by-step instructions:

1. Device selection: An ultrasonic thickness gauge is suitable for household use (for example, CHY-113 or Elcometer 456). Magnetic devices are cheaper, but less accurate on aluminum or galvanized surfaces.
2. Surface preparation: clean the measuring area from dirt, rust and paintwork (paint). Use solvent 646 or white spirit for degreasing.
3. Calibration: Before measurement, calibrate the device using a reference plate (usually included in the kit).
4. Measurements: Take measurements at 3-5 points on each panel (e.g. on the hood: center, hinges and edges).

Normal values for a used car:

• 🟢 0.7–0.9 mm - standard for most panels (hood, roof, doors).
• 🟡 0.5–0.6 mm - a critically thin metal prone to corrosion. Often found on budget cars or after body repairs.
• 🔴 Less than 0.5 mm - a sign of heavy wear or manufacturing defects. Such elements require replacement.

Thresholds (especially below and inside)

Wheel arches (often rot due to sandblasting)

Spars (thickness should be 1.2 mm or more)

Trunk floor (thin place on many hatchbacks)

Panel joints (there may be putty instead of metal) -->

If the device shows sudden changes in thickness (eg 0.8mm next to 0.3mm), this could mean:

• 🔧 Availability putty or welded patches after repair.
• 🦟 Corrosion from the inside, when the outer layer is still intact, and the inner layer is eaten away by rust.
• 🏭 Factory defect (e.g. uneven stamping).

Which body elements are the most vulnerable?

Not all body parts are equally susceptible to wear. Here TOP 5 risk zones, where the metal is thinner or rusts faster:

1. Thresholds: thickness 0.7–1.2 mm, but are constantly exposed to water, salt and sandblasting. In 80% of cases, it is the thresholds that rot first.
2. Wheel arches: the metal here is thinner (0.6–0.8 mm) and is often damaged by stones. SUVs (eg. Nissan X-Trail) suffer from this more often than sedans.
3. Trunk bottom: for hatchbacks and station wagons (for example, Skoda Octavia) is often thinner than 0.7 mm and accumulates moisture.
4. Panel joints: In weld areas, the metal may be 10–15% thinner due to thermal effects.
5. Roof: seems safe, but many cars (for example, Kia Rio) its thickness does not exceed 0.6–0.7 mm, which leads to dents from hail.

Interesting fact: pickups (for example, Ford Ranger or Toyota Hilux) the metal in the cargo platform is often thicker than in the cabin - 1.2–1.5 mm versus 0.8–1.0 mm. This is due to increased loads when transporting goods.

Comparison of steel, aluminum and composite bodies

Modern cars are increasingly abandoning traditional steel in favor of lightweight materials. Let's look at the pros and cons of each option:

Body type	Thickness, mm	Benefits	Disadvantages
Steel	0.6–2.5	✅ Cheap to repair ✅ Good impact resistance	❌ Heavy ❌ Prone to corrosion
Aluminum	1.0–1.5	✅ Lighter than steel by 30–40% ✅ Does not rust	❌ Expensive repairs ❌ Less rigidity with equal thickness
Composite (carbon fiber)	2.0–5.0	✅ The easiest ✅ Does not corrode ✅ High strength	❌ Very expensive repairs ❌ Difficult disposal

For example, Tesla Model S has an aluminum body with carbon fiber elements, which reduces weight by 20% compared to its steel counterpart. However, after an accident, repairing such a car costs 2–3 times more. At the same time Toyota Land Cruiser 300 retains steel body with high-strength steel reinforcement 980 MPa, which ensures high safety with a metal thickness of 0.8–1.2 mm.

⚠️ Attention: Aluminum bodies require special equipment for repair (argon welding, rivets). Not all car services undertake such work, and the cost can reach 50–70% of the price of a new item.

What to do if the metal is too thin

If after checking it turns out that the metal on your car is thinner than normal, there are several ways to extend the life of the body:

• 🛡️ Anti-corrosion treatment: application ML oils or wax compositions (for example, Tectyl or Dinitrol) on sills and arches will slow down rusting for 2–3 years.
• 🔧 Installation of protective elements:
  • Plastic mud flaps on the wheel arches.
  • Metal plantains (1.5–2.0 mm thick).
  • Film PPF (polyurethane protection) on the hood and roof.
• 🔄 Local repair: if the metal thickness has dropped below 0.5 mm, it is more advisable to cut out the rotten part and weld a patch of 0.8–1.0 mm steel.
• 🚗 Replacing an element: For sills or side members, it is often cheaper to buy a new element than to restore the old one.

The cost of work depends on the car model. For example, replacing the threshold with Lada Vesta will cost 8–12 thousand rubles (with painting), and for Mercedes-Benz E-Class — 30–50 thousand rubles. At the same time, saving on metal thickness when buying a new car can result in additional repair costs after 3–5 years.

FAQ: Frequently asked questions about body metal thickness

🔍 Why can the metal thickness of one model differ from different sources?

The thickness depends on the year of manufacture, country of assembly and configuration. For example, Volkswagen Polo for Russia it may have thresholds with a thickness of 1.0 mm, and for Europe - 1.2 mm. Manufacturers also sometimes change metal suppliers, which affects the final product.

🚗 Which thickness gauge is better to buy to check a car?

An ultrasonic thickness gauge is suitable for household use. Elcometer 456 (price ~15 thousand rubles) or budget CHY-113 (~5 thousand rubles). For a professional examination, it is better to choose a magnetic-ultrasonic device PosiTest, which works more accurately with galvanized surfaces.

🔧 Is it possible to strengthen thin metal bodywork with your own hands?

Yes, but this is a temporary solution. Methods:

1. Paste carbon fiber or kevlar patches (for example, 3M Scotch-Weld).
2. Install additional amplifiers made of steel 1.5–2.0 mm for sills or side members.
3. Process anti-gravel (for example, Body 930) internal cavities.

However, these measures will not replace a full repair.

📊 Which car brands have the thickest metal in 2026?

Leaders in body metal thickness:

• Mercedes-Benz G-Class (spars up to 2.5 mm).
• Toyota Land Cruiser 300 (thresholds 1.3–1.5 mm).
• Volvo XC90 (uses steel Boron thickness 1.0–1.8 mm).
• Ford F-150 (aluminum body with 1.2 mm steel reinforcement).

In the budget segment, the thickest ones are - Kia Sorento (thresholds 1.1 mm) and Hyundai Santa Fe (spars 1.4 mm).

⚠️ What to look for when buying a car with an aluminum body?

Key points:

• Check the accident history - aluminum does not tolerate deformation well.
• Find out if there is a service in your city that works with aluminum (special equipment is required).
• Please note corrosion of contact areas (for example, where aluminum meets steel).
• Please note that insurance for such cars may be 10–15% more expensive.