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Frequently Asked Questions

Find answers to common questions about our garage services, repairs and vehicle maintenance.

How Can We Help?

Browse our frequently asked questions below. If you can’t find the answer you’re looking for, feel free to get in touch with our team – we’re always happy to help.

General Questions

Get answers to the most common questions about our services, appointments and more.

What services does ONYX Performance provide?

Our air con regas starts from £80 + VAT for R134a systems, and £120 + VAT for R1234yf systems. The exact price depends on the refrigerant your vehicle uses.

How do I book an appointment?

It depends on the age and model of your vehicle — most cars manufactured after 2017 use R1234yf, while older vehicles typically use R134a. If you’re not sure, send us your vehicle registration and we’ll check for you.

Do you service all makes and models?

A standard air con regas usually takes around 30–45 minutes, so in most cases we can have you back on the road the same day.

Can I send my vehicle registration before booking?

This can be caused by low refrigerant, a leak, a faulty compressor, a pressure sensor fault, or an electrical issue. A regas will top up the refrigerant, but if there’s an underlying fault, we’d recommend booking a diagnostic check first.

Servicing & Repairs

Information about our vehicle servicing, repairs and how we keep your car in top condition.

How often should my car be serviced?

Our air con regas starts from £80 + VAT for R134a systems, and £120 + VAT for R1234yf systems. The exact price depends on the refrigerant your vehicle uses.

How long will my repair take?

It depends on the age and model of your vehicle — most cars manufactured after 2017 use R1234yf, while older vehicles typically use R134a. If you’re not sure, send us your vehicle registration and we’ll check for you.

Do you provide a courtesy car?

A standard air con regas usually takes around 30–45 minutes, so in most cases we can have you back on the road the same day.

What payment methods do you accept?

This can be caused by low refrigerant, a leak, a faulty compressor, a pressure sensor fault, or an electrical issue. A regas will top up the refrigerant, but if there’s an underlying fault, we’d recommend booking a diagnostic check first.

Tyres & Alloy Wheels

Everything you need to know about tyres, alloy wheels and wheel services.

Do you offer tyre fitting and wheel alignment?

Yes, we offer full tyre fitting services along with precision wheel alignment to ensure even tyre wear and safe, comfortable handling.

Can you repair cracked alloy wheels?

Yes, our team can repair cracked, kerbed or corroded alloy wheels using professional welding and refurbishment techniques to restore them to a like-new condition.

Do you supply and fit premium tyre brands?

Yes, we supply and fit a wide range of premium and budget tyre brands to suit your vehicle and budget.

How long does alloy wheel refurbishment take?

Most alloy wheel refurbishments are completed within 24–48 hours, depending on the extent of the damage and the finish required.

Air Conditioning

Keep your vehicle cool and comfortable all year round.

Can you recharge my car air conditioning?

Yes, we offer full air con regas services for both R134a and R1234yf systems, recharging your vehicle’s air conditioning with the correct refrigerant.

What are the signs my air con needs servicing?

Common signs include weaker or warmer airflow, unusual smells when the AC is running, strange noises, or the air con taking longer to cool the cabin.

How often should I have my air con checked?

We recommend having your air conditioning checked at least once a year, ideally before summer, to catch any refrigerant loss or faults early.

Do you offer air conditioning repairs?

Yes, alongside regas services we can diagnose and repair issues such as leaks, compressor faults and sensor problems.

Diagnostics & MOT

Advanced diagnostics and MOT testing for your peace of mind.

Can you diagnose warning lights and faults?

Yes, we offer full tyre fitting services along with precision wheel alignment to ensure even tyre wear and safe, comfortable handling.

Can you repair cracked alloy wheels?

Yes, our team can repair cracked, kerbed or corroded alloy wheels using professional welding and refurbishment techniques to restore them to a like-new condition.

Do you supply and fit premium tyre brands?

Yes, we supply and fit a wide range of premium and budget tyre brands to suit your vehicle and budget.

How long does alloy wheel refurbishment take?

Most alloy wheel refurbishments are completed within 24–48 hours, depending on the extent of the damage and the finish required.

Booking & Payments

Details about how to book, payment options and our booking process.

Can you recharge my car air conditioning?

Yes, we offer full air con regas services for both R134a and R1234yf systems, recharging your vehicle’s air conditioning with the correct refrigerant.

What are the signs my air con needs servicing?

Common signs include weaker or warmer airflow, unusual smells when the AC is running, strange noises, or the air con taking longer to cool the cabin.

How often should I have my air con checked?

We recommend having your air conditioning checked at least once a year, ideally before summer, to catch any refrigerant loss or faults early.

Do you offer air conditioning repairs?

Yes, alongside regas services we can diagnose and repair issues such as leaks, compressor faults and sensor problems.

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