---
title: "2015 Toyota Sienna Maintenance at 100,000 Miles"
description: "Learn what maintenance your 2015 Toyota Sienna needs at 100,000 miles, including coolant replacement and ongoing service intervals."
canonical: "https://sidekick.vin/answers/what-is-the-recommended-maintenance-schedule-for-a-2015-toyota-sienna-after-100000-miles"
type: "qa"
vertical: "maintenance"
lastModified: "2026-02-28T14:28:50.588Z"
keywords: ["2015 Toyota Sienna maintenance", "100000 mile service", "Sienna maintenance schedule"]
---
# What is the recommended maintenance schedule for a 2015 Toyota Sienna after 100,000 miles?

> **Quick Answer:** After 100,000 miles, your 2015 Sienna needs a coolant replacement and continued regular maintenance including oil changes every 10,000 miles, tire rotations every 5,000 miles, and spark plug replacements every 60,000 miles.

**Category:** maintenance
**Question Type:** how-to

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---
At 100,000 miles, your 2015 Toyota Sienna hits a major maintenance milestone. The main service at this point is replacing your engine coolant. Beyond that, you'll continue following the same maintenance pattern you've been doing.

## Key 100,000 Mile Service

**Coolant replacement** is the primary service due at 100,000 miles. This keeps your engine running cool and prevents rust inside your cooling system.

## Ongoing Maintenance After 100,000 Miles

Keep up with these regular services based on your mileage:

| Service | Frequency |
|---|---|
| Oil and oil filter change | Every 10,000 miles |
| Tire rotation | Every 5,000 to 7,500 miles |
| Spark plug replacement | Every 60,000 miles |
| Engine air filter replacement | Every 30,000 miles |
| Inspect brake pads and rotors | Every 15,000 miles |

## What Else to Check

At each service appointment, have your technician inspect:

- All fluid levels (transmission, brake, steering)
- Brake lines and hoses for cracks or leaks
- Drive belts and serpentine belt for wear
- Wiper blades
- Transmission condition

These inspections catch small problems before they become expensive repairs.

## Plan Ahead for Future Services

If you haven't replaced your spark plugs since 60,000 miles, you'll need new ones soon. Drive belts typically need replacement between 60,000 and 100,000 miles, so have yours inspected at your next service.

Tracking your maintenance schedule helps your Sienna run reliably for years. Keep records of every service you complete, including dates and mileage. This protects your resale value and helps you spot maintenance patterns.