ModerateAffected: 2005-201160,000–100,000 miles

Toyota Yaris Mk2 1.3 VVT-i 87bhp — Water Pump Leak and Bearing Failure

While incredibly reliable, the 1.3 VVT-i engine's most common weak point is the water pump, which develops a leak and noisy bearing.

Severity

Moderate

DIY Difficulty

Moderate

Est. Cost

£150–£250

OBD Codes

None

Component Diagram

Wheel Bearing

Typical layout and location for the Wheel Bearing assembly.

Reference Illustration

Symptoms

Pink crusty coolant residue on the front of the engine
Grinding or rumbling noise from the auxiliary belt area
Dropping coolant level

Root Cause

The internal seal of the water pump perishes over time. Toyota's pink Super Long Life Coolant leaves a very obvious crusty trail when it leaks.

How To Fix

Very easy to spot visually.
Replace the water pump (Aisin OEM part recommended, £50)
Replace the auxiliary drive belt at the same time
Cost fitted: £150-250

Estimated Repair Costs

Repair Option	Est. Cost (GBP)
DIY (parts only)	£60–£100
Independent Garage	£150–£250
Main Dealership	£240–£400

Other Faults on This Variant

MMT Semi-Automatic Gearbox Actuator Failure

Critical

2005-201150,000–90,000 miles£500–£1500

Models fitted with the Multi-Mode Transmission (MMT) — an automated manual — suffer from severe actuator wear, causing the car to drop into neutral while driving.

Air Conditioning Condenser Leak (Stone Damage)

Minor

2005-201140,000–120,000 miles£250–£450

The air conditioning condenser is mounted at the very front of the cooling pack, making it highly susceptible to stone damage from the road, leading to refrigerant loss.

Front Anti-Roll Bar Drop Link Wear

Minor

2005-201130,000–80,000 miles£60–£120

The front anti-roll bar drop links wear out on heavily potholed UK roads, causing an annoying knocking sound at low speeds.

Disclaimer: Repair cost estimates are indicative and based on community data. Always get a quote from a qualified mechanic before proceeding with any repair.