2006-2008 Toyota Yaris Relay Guide: Troubleshooting and Replacement
Solve common electrical problems in your Yaris by understanding how to diagnose and replace a faulty relay.
- A bad relay often mimics a more expensive part failure; always check the relay first.
- Use the 'swap test' with an identical relay from a non-critical system (like the horn) to diagnose the problem for free.
- Most relays are plug-and-play and located in the fuse boxes, making this a very simple DIY replacement.
- Be aware that some relays on the Yaris may be integrated into a larger module and are not individually replaceable.
Signs of a Failing Relay in Your Yaris
A bad relay can cause confusing symptoms that often mimic the failure of a more expensive part. Before you replace a fuel pump or starter, it's wise to check the relay first. Symptoms depend entirely on which relay is failing.
- Engine Cranks But Won't Start: This is the most common sign of a bad fuel pump relay. The relay isn't telling the fuel pump to turn on, so the engine gets no fuel.
- Car Stalls Suddenly: A failing fuel pump relay can cut power intermittently, causing the engine to stall while driving. It might restart after cooling down.
- A/C Blows Warm Air: If the A/C relay fails, it won't activate the A/C compressor clutch. You won't hear the typical 'click' when you turn on the A/C, and the system will only blow ambient-temperature air. 🎬 Watch: How to test and replace your A/C relay
- Car Won't Start (No Crank, Just a Click): A single, sharp click when you turn the key often points to a starter relay that has failed. It's trying to send power to the starter but can't complete the circuit. 🎬 See this walkthrough for locating and replacing the starter relay
- Burning Smell: A faint plastic burning smell from the fuse box area can indicate a relay is overheating and melting internally.
Pro Tip: The Relay Swap Test
Your Yaris uses several identical relays for different functions. You can find the relay layout on the inside of the fuse box cover. If you suspect your fuel pump relay is bad, you can swap it with an identical relay from a non-essential system, like the horn or fog lights. If the car starts, you've found your problem. This is a free and effective diagnostic trick.
Choosing the Right Aftermarket Relay
When shopping for a new relay, you'll find Original Equipment Manufacturer (OEM) parts from a Toyota dealer and aftermarket options. For a component like a relay, an aftermarket part is often a practical and budget-friendly choice.
- OEM Relays: These are the exact same parts your vehicle was built with. They offer guaranteed fit and quality but come at a higher price, sometimes costing over $50 at a dealership.
- Aftermarket Relays (Replacement Brand): Brands like 'Replacement' offer a direct-fit, functional alternative at a much lower cost. For a simple, plug-in part like a relay, these provide excellent value for a DIY repair. While they may not have the same long-term durability as a premium OEM part, they are a reliable solution for getting your Yaris back on the road without overspending.
Important: Integrated Relays
Be aware that on some Yaris models, certain relays (like the fuel pump relay) may be soldered directly into a larger computer module, sometimes called an 'Integration Relay' or Body Control Module. These are not simple plug-and-play parts. If you cannot find a specific relay in the fuse box, it may be integrated. This type of repair is more complex and may require replacing the entire module.
Relay Replacement Cost for 2006-2008 Toyota Yaris
Replacing a relay is one of the most affordable repairs you can perform. The main cost difference is between doing it yourself and having a shop do it, as shop labor is the biggest expense.
| Part/Service | Estimated Cost |
|---|---|
| New Aftermarket Relay | $15 - $25 |
| New OEM Relay | $40 - $70+ |
| Shop Labor & Diagnosis | $50 - $200 |
| DIY Total Cost | $19.89 |
| Shop Total Cost | $70 - $225 |
Frequently Asked Questions
Where are the relays located on a 2006-2008 Yaris?
Your Yaris has two main fuse/relay boxes. The first is in the engine compartment, usually a black plastic box near the battery. The second is inside the car, under the dashboard on the driver's side. The diagram on the inside of the box cover will show you which relay does what.
Can I replace a Yaris relay myself?
Yes, for most relays this is an extremely easy DIY job. It requires no tools. Simply locate the correct relay in the fuse box, pull the old one straight out, and push the new one firmly into its place. It's as simple as changing a fuse.
Are there any recalls for Yaris relays?
No. While there have been recalls for the 2006-2008 Toyota Yaris for issues like seat rails and the airbag spiral cable, there are no specific recalls for the fuel pump, starter, or A/C relays on these model years.
How do I test a relay?
The easiest way is the 'swap test' mentioned above. For a more technical test, you can use a multimeter to check for continuity and resistance across the coil pins (usually labeled 85 and 86) and verify that the switch contacts (usually 30 and 87) close when power is applied to the coil.
🎬 Watch: A professional guide to testing automotive relays properlyHelpful Videos
Technical Specifications
OEM Part Numbers: 90987-02027 90080-87026 90987-02028
Standard 4-pin 12V automotive relay. Multiple relays in the vehicle share the same part number.
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Toyota Yaris: