New MOT Rules: Understanding Emissions Testing for Hybrids and EVs

As the UK continues its transition to cleaner transport, the 2025 MOT rule changes reflect a growing emphasis on environmental compliance and vehicle safety. While electric vehicles (EVs) and hybrids were once subject to lighter testing, the latest updates from the Driver and Vehicle Standards Agency (DVSA) introduce more rigorous inspections, particularly for vehicles over seven years old.

Let’s break down what’s changed, what’s being tested, and how to prepare your hybrid or EV for a successful MOT.

What’s New in the 2025 MOT for Hybrids and EVs?

Under the updated MOT regulations, hybrid and electric vehicles are no longer exempt from detailed inspections. While EVs still bypass traditional exhaust emissions testing, they now face checks on systems that indirectly affect efficiency and safety.

Key updates include:

• Hybrid battery health checks: Voltage efficiency scans are now mandatory for hybrid battery packs, especially for vehicles manufactured before 2018.
• Regenerative braking system evaluation: MOT testers will assess the performance and safety of regenerative braking, which plays a key role in energy recovery and stopping power.
• Emission sensor integrity: Tampered or faulty emission sensors (common in plug-in hybrids) can now result in an automatic MOT failure.
• EV battery and high-voltage system inspection: While still visual, this check ensures there are no leaks, exposed wires, or signs of damage.

These changes aim to ensure that low-emission vehicles continue to operate safely and efficiently throughout their lifespan.

Common MOT Failures for Hybrids and EVs:

Despite having fewer moving parts than petrol or diesel cars, EVs and hybrids are not immune to MOT failures. According to recent data, the most frequent issues include:

• Worn tyres: Heavier EVs tend to wear tyres faster, especially on SUVs.
• Brake disc corrosion: Regenerative braking reduces the use of traditional brakes, which can lead to rust and uneven wear.
• Suspension faults: The added weight of battery packs can strain suspension components over time.
• Lighting issues: LED headlamps and indicators may fail or become misaligned.
• Wiper and washer faults: Simple but often overlooked, these can still cause a failed test.

How to Prepare Your Vehicle for the New MOT:

To avoid surprises during your MOT, consider the following tips:

• Check tyre tread depth and condition regularly.
• Run your traditional brakes periodically to prevent corrosion.
• Inspect all lights and indicators for proper function and alignment.
• Top up washer fluid and replace worn wiper blades.
• Book a pre-MOT inspection with a garage experienced in hybrid and EV systems.

Staying proactive with maintenance not only improves your chances of passing but also extends the life of your vehicle.

Supporting Sustainability with Remanufactured Parts:

If your hybrid or EV requires a replacement component, consider choosing a remanufactured part. These parts are professionally rebuilt to meet original specifications and offer several advantages:

• Cost-effective: Remanufactured parts typically cost less than brand-new equivalents.
• Environmentally responsible: Reusing components reduces waste and supports the circular economy.
• Quality assured: Reputable suppliers test remanufactured parts thoroughly, often backing them with warranties comparable to those provided with new parts.

By choosing remanufactured components, you’re not only saving money, you’re also contributing to a more sustainable automotive future.

The 2025 MOT updates mark a significant shift in how hybrids and EVs are assessed for roadworthiness. With new checks on battery health, braking systems, and emissions sensors, it’s more important than ever for UK motorists to stay informed and prepared.

Whether you drive a plug-in hybrid or a fully electric vehicle, regular maintenance and smart part choices can help you stay compliant, safe, and environmentally conscious.