Infiniti G20 Brake Light Switch Guide (1991-2002)
Solving common issues like brake lights that won't turn off or on for your G20.
- Before replacing the switch, check for a broken plastic stopper on the brake pedal arm; this is a very common failure point.
- A bad switch is a critical safety issue and should be fixed immediately.
- This is a simple, inexpensive DIY repair that most owners can complete in under 30 minutes.
- Symptoms include brake lights not working, brake lights staying on, or being unable to shift out of Park.
Is Your G20 Brake Light Switch Failing?
A faulty brake light switch can cause several noticeable problems. Because this part is essential for safety, you should address these symptoms immediately. A failure can be dangerous and may also prevent you from being able to shift your car out of park.
Symptoms of a Bad Brake Light Switch
- Brake Lights Don't Work: The most dangerous symptom is when your brake lights fail to illuminate when you press the brake pedal.
- Brake Lights Stay On: The switch can fail in the 'on' position, leaving your brake lights constantly lit. This will drain your battery.
- Cannot Shift Out of Park: The switch is part of the safety interlock system that requires the brake to be pressed before shifting. If it fails, your gear selector may be stuck in Park.
- Cruise Control Won't Activate or Disengages: The cruise control system relies on the brake switch to know when to turn off. A faulty switch can prevent it from working correctly.
- ABS Warning Light: In some cases, a failing brake light switch can trigger the ABS warning light on your dashboard.
CHECK THIS FIRST: The Pedal Stopper
Before you buy a new switch, check under your dashboard at the brake pedal arm. Many older Nissan and Infiniti vehicles have a small plastic or rubber stopper that presses the switch's plunger. These stoppers can become brittle, crack, and fall out. If the stopper is missing, the switch plunger will extend through the hole in the pedal arm, causing the brake lights to stay on constantly. You may find broken plastic pieces on your floor mat. This is a very common issue and a much cheaper fix than replacing a perfectly good switch.
Choosing the Right Aftermarket Brake Light Switch
For a vehicle like the 1991-2002 G20, aftermarket brake light switches offer excellent value and are readily available. The original OEM part is a simple design, and quality aftermarket replacements are more than adequate for the job. There is no significant performance or longevity advantage to sourcing an expensive OEM switch for this specific part.
Aftermarket Brand Tiers
- Premium Aftermarket (Good): Brands like Beck Arnley and Standard Ignition (SMP) are well-regarded in the industry. Beck Arnley is known for sourcing parts that meet or exceed OE specifications, and sometimes even re-packages the original OEM part. Standard Ignition has a long history of producing reliable electronic components.
- Standard Aftermarket (Better): Facet is an established European brand with a reputation for producing decent quality electronic parts. Holstein is another option that often provides a good balance of quality and price, sometimes with an extended warranty.
- Economy Aftermarket (Basic): Rostra Powertrain is known more for transmission components but also produces switches. While they are an established manufacturer, for a simple and critical part like a brake light switch, sticking with brands known for electronics is often a safer bet.
Pro Tip: Given the low cost of even the premium aftermarket options, spending a few extra dollars for a brand like Beck Arnley or Standard Ignition is a wise investment for a critical safety component.
Cost to Replace Infiniti G20 Brake Light Switch
| Part/Service | Estimated Cost |
|---|---|
| DIY Aftermarket Part | $6 - $33 |
| Shop Labor | $40 - $60 |
| Total at a Shop | $71 - $90 |
Costs are estimates and may vary based on your location and the specific repair shop.
Frequently Asked Questions (FAQ)
Can I replace the brake light switch myself?
Yes, this is a very easy DIY job for most owners. The switch is located above the brake pedal and is typically held in place by a lock nut. The process involves disconnecting the electrical connector, unscrewing the old switch, and screwing in the new one. You will need to adjust its position so the brake lights turn on and off correctly with pedal movement.
Why are my brake lights still stuck on after replacing the switch?
The most likely cause is the missing plastic pedal stopper on the brake pedal arm, as mentioned in the warning box above. Another possibility is that the new switch is not adjusted correctly. It may be threaded in too far or not far enough, causing it to be constantly activated or not activated at all.
Is there a recall on the G20 brake light switch?
No, there are no specific recalls for the 1991-2002 Infiniti G20 brake light switch. While other Infiniti models have had recalls for similar issues, the G20 was not included.
Does the P10 (1991-1996) and P11 (1999-2002) G20 use the same switch?
Yes, most aftermarket parts suppliers list the same brake light switch for all model years from 1991 to 2002. However, always confirm the fitment for your specific year when purchasing.
Technical Specifications
A 2- or 4-pin electrical switch activated by the movement of the brake pedal.
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 G20: