Buy Acura Integra Center High Mount Stop Light Bulbs

The Acura Integra's center high-mount stop light bulb-also called the third brake light bulb, CHMSL bulb, or high stop-lamp bulb-is a small part that does a big safety job. It sits high on the car's rear window or spoiler so drivers behind you can see your brake signal even when other lamps are hidden. All Integra models built since 1986 have one, and newer 2023-present Integras use an LED strip instead of a replaceable wedge-base bulb. Keeping this lamp bright and working helps cut rear-end crashes, meets U.S. safety rules, and can even make your brake-light circuit last longer and draw less battery power. (NHTSA, eCFR)

Federal research showed that adding a high-mount stop lamp cut rear-end collisions by about 50 percent in taxi tests and about 5 percent fleet-wide once mandated. (American Psychological Association, Crash Stats)
U.S. law (FMVSS 108) has required every passenger car to have this lamp since the 1986 model year. (eCFR)
Because the bulb is mounted higher, following drivers' eyes catch the red flash sooner-especially in heavy traffic. LED versions react about 0.2 seconds faster than filaments, giving the driver behind you almost a full car-length of extra stopping distance at highway speed. (Chem Connections)

• 921 incandescent: 12.8 V, 18 W, 1.4 A. The brightest traditional option and the stock choice for most 1990-2001 Integras. (Bulbs, etrailer)
• 912 incandescent: 12 W, 1 A. Interchangeable but slightly dimmer; sometimes used in JDM imports. (, F150 Online)
• LED retrofit 921/912: Draw as little as 0.12 A and run cooler, helping plastic housings last longer. (Matt Gadient)
• Sealed LED board: Factory on 2023-present Integras; no bulb swap, but the whole board lasts tens of thousands of hours. (eBay)

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Diagrams for fuse locations and rear-lamp wiring are in the factory service manual (pdf) and at Fuse-Box.info. (Redliners, Fuse Box)

1. Disconnect the battery or pull the stop-light fuse to stay safe. Fuse maps for every year are shown on Honda Service Express.
2. Open the housing. Gently pry the plastic bezel or remove screws; a small screwdriver wrapped in tape prevents scratches. (Reddit)
3. Swap the bulb. Pull straight out, push the new wedge-base bulb fully in, and avoid touching the glass with bare hands.
4. Test and reseal. Press the brake pedal or have a helper check brightness before snapping the cover back. If the lamp still stays dark, inspect the brake-light switch bushing under the pedal. (JustAnswer, Reddit)

• Light stays on: Brake-pedal stopper pad may have crumbled-replace the cheap rubber pad. (YouTube)
• None of the three brake lamps work: Check the 15 A stop-light fuse under the dash. (YouTube)
• Only center lamp out: Likely a burned filament or loose socket ground; LEDs seldom fail suddenly.
• Fast turn-signal flash after LED swap: Add an LED-rated flasher or inline resistor to balance current draw.

U.S. Title 49 CFR 571.108 says the center lamp must be red, mounted on vehicle centerline, and serviceable without special tools. (eCFR)
State safety inspections may fail a car if any brake lamp is out, so replace the bulb as soon as it dims.

Switching to a quality LED retrofit halves battery load and reduces lens heat, helping prevent warping of the plastic lens over time. (Matt Gadient)
Look for LEDs with built-in voltage regulators and a wide beam spread so the whole lens glows evenly. Avoid tinted "smoked" lenses that can cut light output and violate photometric rules.

A single 18-W incandescent third-brake bulb that lights for an average 4 % of driving time uses about 13 kWh of energy per 10,000 miles; an LED equivalent uses less than 1 kWh.
Lower current also means less alternator load, which can add a tiny boost to fuel economy.

• Third brake light bulb
• Center brake lamp bulb
• High-mount stop-lamp bulb
• CHMSL bulb
• Eye-level brake-light bulb

• NHTSA third-brake-light effectiveness study (PDF)
• APA summary of early taxi experiment
• Federal Motor Vehicle Safety Standard 108 text
• Automotive lighting overview on Wikipedia
• 1994-2001 Integra fuse-box diagrams
• Energy draw comparison: incandescent vs LED bulbs