Low Emission Zones (LEZs) are no longer just a developing idea: they are part of daily life in many Spanish cities. By 2025, Spain had 49 active LEZs and dozens more in the implementation phase. This expansion is forcing drivers to adapt their vehicles and, above all, is compelling workshops and spare parts distributors to rethink their strategies.
The transformation of the sector is profound. The parts that were most frequently replaced ten years ago are no longer what sustains the current business. Today, everything related to emissions, sensors, diagnostics, and vehicle repairs is crucial for vehicles seeking to continue entering these restricted zones. This article explains how Low Emission Zones (LEZs) are changing the market, which replacement parts are beginning to dominate demand, and how a workshop can adapt to turn this change into a real opportunity.
What exactly are Low Emission Zones (LEZs) and why do they have such a significant impact on the sector?
A Low Emission Zone (LEZ) is an urban area where access is restricted to the most polluting vehicles, based on their environmental rating. Cities with more than 50,000 inhabitants are required to have one, and in some cases, those with more than 20,000 inhabitants if they have air quality problems.
Since 2023, a common legal framework has been in place that establishes how these zones should be implemented. By 2025, the trend is clear: a shift from "soft" Low Emission Zones without penalties to stricter and more uniform systems, with operational cameras and guaranteed fines.
For workshops and spare parts suppliers, this means one thing: vehicles with a B label, and even some C ones, will need more maintenance to avoid being expelled from their usual circulation area .
How ZBEs are changing the demand for spare parts
Vehicles that previously only needed an oil and filter change now require more specific interventions. Parts directly related to emissions are becoming increasingly important.
Parts that are being replaced most in 2025
- Particulate filters (DPF/FAP)
Its saturation prevents passing checkpoints and increases the likelihood of fines.
- EGR systems and associated valves.
They accumulate soot, affect emissions, and are one of the most frequent breakdowns in diesel vehicles circulating in Low Emission Zones.
- Gas and oxygen (lambda) sensors.
Without accurate data, the control unit cannot monitor emissions.
- Catalytic converters and three-way converters.
Many cars with a B label need a complete replacement if they want to improve emissions values.
- Electronic diagnostic components.
OBD and its peripheral sensors are becoming more prevalent in the day-to-day operations of the workshop.
Used and remanufactured parts
The impact of Low Emission Zones (LEZs) is also driving the circular economy. Many vehicles that cannot be adapted end up in scrapyards, generating a large supply of used parts that workshops are taking advantage of, especially for customers looking to repair their vehicles without investing too much.
Adapting old vehicles: a growing opportunity.
Not all drivers can afford to change cars. Many need solutions to continue entering their city without penalties.
Workshops that offer services aimed at reducing emissions are capturing a significant share of this market:
- DPF cleaning and maintenance.
- Replacement of approved catalytic converters.
- Reprogramming within the legal framework.
- Replacement of sensors that affect the air-fuel mixture.
- Preventive checks to ensure stable gas values.
There is also a growing demand for personalized advice. Customers want to know if their car can be salvaged or if it's a good idea to sell it before it loses value.
Challenges for workshops: costs, training and customer pressure.
The transition is not proving easy. The workshops are facing three major pressures:
1. Investment in machinery
Advanced diagnostic equipment, emissions-specific tools, and new calibration systems increase fixed costs.
2. Continuing education
Emissions-related breakdowns are complex. The difference between "fixing" and "patching" is enormous. Workshops that don't invest in training will fall behind.
3. Customers looking to save as much as possible
Many drivers are in a precarious financial situation. They can't afford a new vehicle and are looking for the most economical solutions possible. This forces workshops to offer alternatives: approved but cheaper parts, remanufactured replacements, or agreements with reliable scrap yards.
Strategies to turn the BEZ into a competitive advantage
The workshops that are growing in 2025 share a common pattern: they have specialized.
Here are some clear guidelines:
Services geared towards the LEZ
- Pre-MOT emissions checks.
- Professional DPF cleaning.
- Replacement of critical sensors.
- Complete gas analysis with report.
Adaptation kits
Bundled services and parts into a fixed offer, it helps the customer understand what they need and how much it will cost.
Partnerships with scrap yards and distributors
Remanufactured and used parts are gaining ground, and offering these options expands the workshop's room for maneuver.
Clear communication
Customers look for workshops that explain the problem in simple terms and suggest the most realistic solution. The workshop that informs and anticipates wins.
What about cars that can't be adapted?
Some vehicles, due to their age or mechanical condition, do not and will not meet the requirements. This has two direct effects:
- More scrap yards and scrappage , especially of cars without labels.
- Increased market for used spare parts , useful for keeping vehicles that can still circulate outside the ZBE alive.
Workshops that work with recycled spare parts can capture a segment that seeks to extend the life of their car without large outlays.
Inequality between cities: not all LEZs are the same
In Spain, strict Low Emission Zones (LEZs), soft LEZs, and LEZs that do not yet issue fines coexist.
This creates important differences:
- In large cities (Madrid, Barcelona, Valencia), the pressure is immediate.
- In medium-sized cities, implementation is more gradual.
- In rural areas, the LEZ has little impact, but the aging of the vehicle fleet continues to generate demand for spare parts.
For a workshop, understanding local politics is essential.
Where is the sector headed in the coming years?
The data from 2025 points to a clear scenario:
- Low Emission Zones will continue to expand.
- The sanctions will be more uniform.
- Demand for emissions-related spare parts will continue to increase.
- Workshops specializing in diagnostics and efficiency will have an advantage.
- The circular economy will gain importance: used, remanufactured and recycled parts.
Maintenance will become a tool to avoid fines, not just to pass the MOT test.
Low Emission Zones are pushing workshops to evolve. It's not just about repairing cars, but about helping customers maintain their mobility without breaking the bank. Workshops that anticipate this, train their staff, and communicate clearly will not only survive this transition, they will thrive.
