CoolingMedium
Internal (chain-driven) water pump wear.
Head gasket / cooling system repair£900–£2,600
Inspect · Check for coolant loss; note the labour-intensive replacement.
2016–2023 Mazda CX-9 · common fault repair costs
What the known faults on this Mazda CX-9 typically cost to put right at a UK independent garage · use the figures to price risk before you bid, and to justify a reduction when something shows up on inspection.
Cost at a glance
- Most expensive fault
- £900–£2,600
- Top three risks, from
- £1,220
- Worst case, everything
- £5,300
The single priciest documented job on the 2016–2023 Mazda CX-9 is head gasket / cooling system repair at £900–£2,600. Few cars need every repair listed here · treat £1,400–£5,300 as the full exposure if one arrived with all of them.
Cost per fault
ElectricalLow
Infotainment freezes.
Infotainment repair or software fix£120–£1,200
Inspect · Test the screen and controls.
BrakesMedium
Brake booster faults.
Brakes (discs, pads, caliper)£200–£800
Inspect · Test pedal feel and scan for codes.
EngineMedium
2.5T carbon build-up on intake valves.
Routine repair£180–£700
Inspect · Watch for rough idle / hesitation; ask about any walnut-blast cleaning.
Ranges are indicative parts-and-labour costs at a UK independent garage, inclusive of VAT. Franchised dealers typically sit 40–80% higher, and prestige or electrified variants sit at the top of each band. Always get a written quote before committing.
Inspecting a Mazda CX-9 this week?
Build a tickable checklist for the exact car in front of you, record faults with photos, and hand the buyer a report.