Over the past decade, hybrid taxis have become an increasingly common sight on UK roads. With cities like London introducing stricter emission standards and incentivising cleaner transport options, many taxi operators have turned to hybrid vehicles as a cost-effective and environmentally friendly solution.

While hybrids offer lower fuel costs and reduced emissions, they also face unique challenges when it comes to the MOT test — particularly because of the extremely high mileage that taxis usually cover.

Why High Mileage Matters for Hybrid MOTs

Taxis often clock up significantly more miles each year than privately owned cars. While the average UK driver might cover 7,000–10,000 miles annually, taxis can easily exceed 30,000–40,000 miles. This level of use puts additional strain on critical components that are tested during the MOT, including brakes, suspension, tyres, and emissions systems.

For hybrid taxis, there’s the added factor of the battery pack and the electric motor. Though not directly tested in an MOT, wear and tear on these parts can still lead to knock-on issues that impact a vehicle’s ability to pass.

Common MOT Challenges for Hybrid Taxis

1. Brake Wear
2. Hybrid vehicles rely on regenerative braking, which generally reduces brake pad wear. However, the stop-start nature of taxi driving means pads and discs can still deteriorate faster than in private cars.
3. Suspension Strain
4. Heavy daily usage, often with multiple passengers and luggage, accelerates suspension wear — one of the most common causes of MOT failure.
5. Exhaust and Emissions Testing
6. Hybrids switch between petrol engines and electric power. For taxis running long hours, the combustion engine is still used frequently, leading to wear in catalytic converters and exhaust systems.
7. Battery Ageing
8. Although not a direct MOT item, ageing hybrid batteries can reduce overall vehicle performance, which may contribute to related MOT concerns such as increased emissions.

How Taxi Owners Can Reduce MOT Failures

To keep hybrid taxis roadworthy and minimise the risk of MOT failures, regular maintenance is essential. Taxi operators should:

• Schedule interim services more frequently than standard annual checks.
• Pay close attention to tyres, brakes, and suspension.
• Monitor the health of the hybrid battery with specialist checks.
• Use MOT history check services like Check MOT to stay on top of vehicle records and advisory notes.

The Future of Hybrid Taxi MOT Testing

As more hybrid taxis join the UK fleet, MOT testing standards may evolve to place greater emphasis on electric components. With stricter emission targets on the horizon, taxi operators will need to ensure their vehicles remain compliant and reliable, balancing efficiency with safety on the road.

FAQs

Do hybrid taxis need a different MOT than petrol cars?

No, hybrids undergo the same MOT test as other vehicles, but their unique components may affect how often repairs are needed.

Are hybrid batteries tested in an MOT?

Currently, hybrid batteries are not tested in an MOT, but battery performance issues can indirectly cause failures in related areas.

How often should hybrid taxis be serviced?

Due to high mileage, taxi operators should consider servicing every 6,000–10,000 miles, rather than waiting for the annual MOT.