What reliability score does the Lexus IS get?

6.0 out of 10, scored from the 8 faults we document for this model and how severe each one is.

Is the 2013–2022 Lexus IS reliable?

Scored from 8 documented faults · reviewed by the VehicleFaults Research Team

Quick answer

6.0/ 10

Mixed

On our documented-fault scoring the Lexus IS rates 6.0 out of 10 · mixed. We hold 8 known faults for it and 1 are rated high severity, so the risk is real but contained. The weak points cluster around battery, brakes and suspension. A well-serviced example with evidence for the big-ticket items is usually a safe buy; the score describes the model, not the specific car in front of you.

Verdict · Negotiate · budget for the known faults

What the score is built from

Critical: 0
High: 1
Medium: 4
Low: 3

Weak points cluster around battery, brakes, suspension, body.

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The faults that decide it

Engine / CoolingHigh

Electric water pump failure or leakage on the 2.5L hybrid engine.

Typically appears: 80,000-120,000 miles
What to inspect: Open the bonnet and shine a torch down the front of the engine block. Look for pink, crusty coolant deposits around the pump housing and listen for a high-pitched bearing whine.
Typical repair: Cooling component replacement · £220–£750

BatteryMedium

Hybrid battery degradation on high mileage cars

Typically appears: 120,000+ miles
What to inspect: Get a hybrid health check before purchase
Typical repair: EGR valve / cooler replacement · £300–£900

BrakesMedium

Rear disc corrosion from regen use

Typically appears: 30,000+ miles
What to inspect: Inspect discs for pitting and scale
Typical repair: Brakes (discs, pads, caliper) · £200–£800

Interior / ElectronicsMedium

Infotainment screen delamination or continuous system rebooting.

Typically appears: 50,000-80,000 miles
What to inspect: Turn on the ignition and examine the central display for air bubbles or peeling under the glass. Test the rotary dial to ensure the system does not freeze or reboot.
Typical repair: Infotainment repair or software fix · £120–£1,200

Body / InteriorMedium

Water ingress into the boot and 12v battery tray due to perished rear pressure relief vents.

Typically appears: 60,000-90,000 miles
What to inspect: Lift the boot floor carpet and inspect the 12v battery well on the left side, plus the spare wheel well, for standing water, dampness, or a musty smell.
Typical repair: Starting & charging parts · £150–£650

Costs are indicative UK independent-garage bands for budgeting and negotiation · never a quote.

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What the score is built from

The faults that decide it

Inspecting a Lexus IS?

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