Your 2008-2012 INFINITI EX35 Brake Light Switch: A Complete Replacement Guide
Don't get stranded—understand the symptoms of a failing brake light switch and how to choose the right replacement.
- A faulty brake light switch is a primary cause for a 2008-2012 EX35 not starting or being stuck in Park.
- Replacement is a very easy DIY job that takes less than 15 minutes and requires no special tools.
- Before replacing the switch, check the brake pedal arm for a small, missing rubber stopper, which can cause identical symptoms.
- It is unsafe to drive with a faulty brake light switch as your brake lights may not function, increasing the risk of a rear-end collision.
Is Your Brake Light Switch Failing?
A faulty brake light switch on an EX35 doesn't always fail completely. It can cause intermittent problems that are easy to misdiagnose. Because this switch is tied into the ignition and drivetrain computers, the symptoms can seem unrelated to the brakes. Paying attention to these specific signs can save you from a headache and an incorrect repair.
🎬 Watch: A breakdown of common bad brake light switch symptomsSymptoms of a Bad 2008-2012 EX35 Brake Light Switch
- Car Won't Start: This is a very common symptom for the EX35. The push-button start requires a signal from the brake light switch to know your foot is on the brake. If the switch is bad, the car won't get the signal and will refuse to start.
- Cannot Shift Out of Park: Similar to the starting issue, the shift interlock needs to know the brake is applied before it will let you move the gear selector. A bad switch can leave you stuck in Park.
- Brake Lights Don't Work: The most obvious and dangerous symptom. Your brake lights may not illuminate at all when you press the pedal.
- Brake Lights Stay On: The switch can also fail in the 'on' position, leaving your brake lights permanently lit and draining your battery.
- Cruise Control Issues: Your cruise control may not engage, or it might shut off unexpectedly.
- Warning Lights on Dash: A failing brake switch can sometimes trigger ABS or VDC/Slip warning lights on your instrument cluster.
No Recalls, But A Known Issue
While there are no official recalls or TSBs from INFINITI for the brake light switch on the 2008-2012 EX35, the symptoms are well-documented by owners. A similar issue on other Nissan vehicles involved a small rubber stopper on the brake pedal arm disintegrating. If this stopper is missing, the switch plunger won't be depressed, causing the car to think the brakes are always on. Always check for this stopper before replacing the switch.
🎬 See how a missing rubber stopper keeps brake lights onChoosing the Right Aftermarket Brake Light Switch
When it comes to aftermarket parts, quality can vary. For a critical component like this, it's important to choose wisely. Based on owner feedback and brand reputation, we can group the available options into tiers.
Tier 1: OEM-Equivalent Quality
- Beck Arnley: This brand has a strong reputation for sourcing parts directly from OEM manufacturers. You might even find an OEM part in their box. They are a trusted choice for fit and function.
- Standard Ignition (SMP): Generally considered a reliable, high-quality aftermarket brand that offers good performance and value.
Tier 2: Value-Oriented Brands
- Dorman: A widely available budget option. While it may work, some owners report a shorter lifespan compared to other brands.
- URO Parts: This brand is more common for European cars, and reviews are mixed. While it may meet specifications, consistency can be a concern.
- Facet, Holstein, Replacement, Rostra, True Tech, Vemo: These brands are functional, budget-friendly choices, but lack the extensive positive feedback of the Tier 1 brands.
A Note on Fitment
One INFINITI owner reported buying an aftermarket switch that did not fit the vehicle's wiring harness correctly, forcing them to purchase an OEM part. While this is rare, it highlights a potential risk with budget parts. Test-fit the electrical connector before fully installing the new switch.
Cost of Replacing the Brake Light Switch
This is a very budget-friendly repair, especially if you do it yourself. The part itself is inexpensive, and the labor is minimal.
| Part/Service | Estimated Cost |
|---|---|
| New Aftermarket Switch | $24 - $68 |
| Shop Labor | $50 - $100 |
| DIY Total | $24 - $68 |
| Shop Total | $74 - $168 |
Frequently Asked Questions
Is it hard to replace the EX35 brake light switch myself?
No, this is considered a very easy DIY job. It typically requires no tools, or at most a flathead screwdriver. The switch is located just above the brake pedal arm. You simply disconnect the wire, twist the old switch to remove it, and install the new one in reverse. The entire process can take as little as 5-10 minutes.
🎬 Watch this quick walkthrough to replace the switch yourselfWhy won't my EX35 start if the brake light switch is bad?
Your EX35 has a push-button start system with a safety feature. To start the engine, the car's computer must receive a signal that the brake pedal is being pressed. The brake light switch is what sends that signal. If the switch is broken, the computer never gets the signal and prevents the engine from starting.
I replaced the switch, but my brake lights are still stuck on. What's wrong?
Check the brake pedal arm for a small plastic or rubber stopper. This piece presses against the switch's plunger when the pedal is released. These stoppers can become brittle and break off. If it's missing, the switch will remain activated constantly. This is a common issue and an easy fix.
Is there a recall for this on my INFINITI EX35?
No. There have been recalls for brake light switches on other Nissan models, but the 2008-2012 INFINITI EX35 is not included in any of them. The problem is a known wear-and-tear issue, not a manufacturing defect covered by a recall for this specific vehicle.
Helpful Videos
Technical Specifications
OEM Part Numbers: 25320-AX10A 25320-AX00E 25320-AX00C 25320-AX00B 25320-AX000
4-pin connector, twist-lock mounting style. Located on the brake pedal support bracket.
We Have This Part in Stock
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.
- INFINITI EX35:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Brake Light Switch Failing?
- Symptoms of a Bad 2008-2012 EX35 Brake Light Switch
- No Recalls, But A Known Issue
- Choosing the Right Aftermarket Brake Light Switch
- Tier 1: OEM-Equivalent Quality
- Tier 2: Value-Oriented Brands
- A Note on Fitment
- Cost of Replacing the Brake Light Switch
- Frequently Asked Questions
- 🎟️ Get 5% Off