
Keep your Nissan running safely and reliably with professional servicing from A1 Diagnostics in Cardiff. We service and repair many popular Nissan models, including the Qashqai, Juke, X-Trail, Micra, LEAF and Note.
Whether your Nissan needs a routine oil service, a full service, diagnostic testing or investigation of a warning light, our experienced team is here to help. We will check which maintenance items are due, explain the work clearly and provide a quotation before carrying out additional repairs.
Regular servicing can help:
1. Keep your Nissan safe and dependable
2. Identify wear before it becomes a larger problem
3. Maintain engine performance and fuel efficiency
4. Reduce the risk of unexpected breakdowns
5. Protect important mechanical components
6. Provide a clear record of vehicle maintenance
Our independent garage is located on Sloper Road near Cardiff City Stadium. We welcome Nissan owners from Leckwith, Canton, Grangetown, Riverside, Ely, Fairwater and communities throughout Cardiff and South Wales.
The correct interval depends on the model, engine, mileage, age and how the vehicle is used. Provide your registration number and mileage so A1 Diagnostics can check what is likely to be due.
The service may include changing the engine oil and filter, inspecting the brakes, tyres, steering, suspension and fluid levels, and replacing additional filters or spark plugs when required.
Yes, A1 Diagnostics can service and repair many Nissan Qashqai, Juke and X-Trail models. The registration number helps us identify the correct engine, parts and servicing requirements.
A suitably equipped independent garage can complete many Nissan servicing and repair procedures. The appropriate schedule should be followed and suitable parts and fluids used. Check the conditions of any manufacturer or third-party warranty.
Yes. We can investigate many engine, brake, airbag, battery, emissions, gearbox and driver-assistance warning lights. Reading the fault code is the starting point; further testing may be needed to confirm the cause.
We can service supported Nissan automatic and Xtronic transmissions. The correct fluid and procedure depend on the gearbox fitted, so we will identify the transmission before providing a quotation.
Reduced power can be caused by several problems, including engine-management, turbocharger, fuel-system, emissions or gearbox faults. Diagnostic testing is needed before the correct repair can be recommended.
Yes. Starting problems can involve the battery, starter motor, key, immobiliser, wiring, fuel system or engine-management components. Our technicians can investigate the cause.
A1 Diagnostics can assess routine maintenance for supported Nissan electric and hybrid models. These vehicles still require checks of brakes, tyres, suspension, cooling systems and other components. High-voltage work requires specific training and equipment.
The cost depends on the model, engine and maintenance items due. Contact A1 Diagnostics with the registration number, mileage and any warning messages for an accurate quotation.

Your Nissan’s servicing requirements depend on its model, engine, age, mileage and maintenance history. We use your registration details to identify the correct service requirements, parts and fluids for your vehicle.
Depending on the service that is due, our technicians may check or replace:
1. Engine oil and oil filter
2. Air filter
3. Cabin or pollen filter
4. Fuel filter where applicable
5. Spark plugs on applicable petrol engines
6. Brake fluid
7. Coolant level and condition
8. Brake pads and discs
9. Tyres and tyre pressures
10. Steering and suspension components
11. Exterior lights
12. Windscreen wipers and washers
13. Battery and charging system
14. Drive belts
15. Visible fluid leaks
We can also complete a diagnostic system scan, reset the service indicator and road-test the vehicle where appropriate.
After the inspection, we will explain any problems we find. We will not carry out additional repair work without discussing it with you first.
Not every Nissan requires the same maintenance. The correct service may depend on:
1. How many miles the vehicle has covered
2. When it was last serviced
3. Whether it is petrol, diesel, hybrid or electric
4. The type of gearbox fitted
5. Whether it is mainly driven on short or long journeys
6. Any warning messages displayed
7. The vehicle’s previous maintenance history
Customers should provide the registration number, current mileage and details of any warning lights when requesting a quotation.



If your Nissan has developed a warning light, unusual noise or change in performance, A1 Diagnostics can investigate the problem and explain what needs to happen next.
Our Nissan services may include:
1. Engine warning-light diagnosis
2. Non-starting and starting-problem diagnosis
3. Vehicle electrical fault finding
4. Battery and charging-system testing
5. Brake repairs
6. Suspension and steering repairs
7. Wheel alignment
8. Air-conditioning services
9. Cooling-system repairs
10. Timing-belt replacement where applicable
11. Timing-chain diagnosis and repairs
12. Turbocharger fault diagnosis
13. Clutch replacement
14. Manual gearbox repairs
15. Automatic and Xtronic gearbox servicing
16. Diesel particulate filter diagnostics
17. AdBlue and emissions-system diagnosis
18. ECU and control-module programming
19. Key coding and immobiliser diagnosis
20. Camera and radar calibration
21. Repairs following an MOT failure
A warning light means the vehicle has detected a problem, but it does not always identify the part that needs replacing.
Our technicians use diagnostic equipment and further testing to investigate the cause. This helps reduce the risk of replacing parts unnecessarily.
Contact us if your Nissan displays:
1. Engine-management warning
2. ABS or brake warning
3. Airbag warning
4. Battery or charging warning
5. DPF warning
6. AdBlue warning
7. Automatic gearbox warning
8. Key-not-recognised message
9. Driver-assistance system warning
If a red warning appears or the vehicle becomes unsafe to drive, stop somewhere safe and seek professional advice.

Some Nissan models use an Xtronic continuously variable transmission, often called a CVT. Other models use different automatic, dual-clutch or conventional transmissions.
Contact A1 Diagnostics if you notice:
1. Juddering
2. Hesitation
3. Delayed drive engagement
4. Unusual gearbox noise
5. Irregular acceleration
6. A gearbox warning light
7. Reduced performance
The correct fluid and servicing procedure depend on the gearbox fitted. Changing the fluid will not repair every gearbox problem, so diagnosis may be needed before servicing or repairs are recommended.

We can service your Nissan engine or repair all the simple faults with your Nissan car. Get in touch if you have any queries we are happy to help.
A1-Diagnostics and ECU Repairs
64 Sloper Road
Leckwith,
Cardiff
CF11 8AB
Tel: (029 20) 220380
Fax: (029 20) 223172
Opening Times
Mon – Fri: 8:00am – 6:00pm
