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3157 3156 LED Bulb - P27/7W P27W Brake Tail & Turn Signal Light 12V 24V
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MIDCARS 3157 3156 T25 LED bulb high output 500LM replacement for automotive brake tail and turn signal lights
3157 P27/7W LED dual filament bulb studio perspective showing 45-emitter radial layout and unibody aluminum pillar
3156 3157 LED wedge base automotive bulbs pair angled profile displaying precision CNC heat sink construction
T25 3157 dual circuit LED bulb macro view of bottom wedge electrical contacts and top optical lens array
3157 P27/7W LED replacement bulb horizontal view demonstrating full circumferential 360-degree beam geometry
MIDCARS 3157 LED brake and tail lamp bulb upright profile engineered for heavy-duty 12V and 24V vehicle systems
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Cross Reference / Direct Replacement
3157 Dual-Filament (W2.5x16q)
3156 Single-Filament (W2.5x16d)
P27/7W (ECE 3157 Dual)
P27W (ECE 3156 Single)
T25 Wedge Socket Standard
3057 / 3155 / 3357 / 3457
3757 / 4057 / 4157 / 4114

3157 3156 LED Bulb - P27/7W P27W Brake Tail & Turn Signal Light 12V 24V

The MIDCARS 31567-45L is an intelligent non-polarity 3157 & 3156 T25 LED bulb engineered with 45x SMD 2835 LEDs on aviation aluminum. Fully compatible with both Standard and CK/SRCK sockets without short-circuiting, it delivers dual-stage 1W/5W (500LM) across 10–30V DC as a direct P27/7W upgrade.
Product Model: 31567-45L
Socket / Base: 3157 (Dual P27/7W) · 3156 (Single P27W) · Non-Polarity (Standard & CK/SRCK Compatible)
Operating Voltage: 10–30V DC (Compatible with 12V & 24V Electrical Systems)
Power Consumption: 3156: 5.0W · 3157: Dual-Stage 1.0W (Low) / 5.0W (High) (Non-CANBus)
Luminous Output: High Mode: 500 Lumens · Low Mode: 90 Lumens
Emitting Color: 6500K White · 3000K Warm White · Red (620-630nm) · Amber (595-600nm)
Optical Construction: 45x High-Efficiency SMD 2835 LEDs (Uniform 360° Optical Array)
Bulb Dimensions: D21mm × 53mm (Precision Fit for Factory T25 / 3157 Housing)
Thermal & Housing: Solid Aviation Aluminum Body (Exposed Array for Direct Heat Dissipation)
Factory MOQ: Standard: from 5 pairs | Custom Packaging: 5,000 pcs (pre-funded)
Quality & Warranty: CE (EMC Compliant), RoHS · 2 Years Factory Warranty
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  • Product Details

Overview: Precision 3157 & 3156 High-Output T25 LED Replacement

The MIDCARS 31567-45L is an industrial-grade T25 wedge LED replacement bulb engineered for both single-filament (3156 / P27W) and dual-filament (3157 / P27/7W) automotive lighting fixtures. Utilizing 45 radially oriented SMD 2835 emitters on a CNC-machined aviation aluminum heat pillar, this bulb produces a full 360-degree cylindrical light beam that maximizes the reflective geometry of factory brake, tail, and turn signal reflectors.

Equipped with a wide-range 10–30V DC constant-current driver circuit, the 31567-45L delivers uniform 500-lumen output across diverse vehicle platforms, completely eliminating high-voltage surging issues in 12V passenger cars and heavy-duty 24V commercial transport fleets.

Precision Blueprint & Multi-Angle Technical Gallery

Review exact physical dimensions and assembly details for the 31567-45L bulb below. Click any image to open the high-resolution lightbox view:

3157 3156 LED Bulb D21x53mm precision dimensional blueprint
Dimensional Blueprint (D21×53mm)
3157 LED bulb beam color options 6500K white warm white red and amber illumination
3157 dual-filament and 3156 single-filament T25 wedge base terminal pinout comparison
Wedge Base Contact Alignment
(3157 4-Wire Pinout · 3156 2-Wire Pinout)

Key Engineering & Operational Features

  • Dual-Filament Electrical Logic (3157 Mode): Features dual independent positive circuits providing high-contrast ratio differentiation between the 1.0W (90LM) low-intensity tail marker mode and the 5.0W (500LM) high-intensity braking/flashing mode.
  • Radial 360-Degree Optical Geometry: 45 pieces of high-output SMD 2835 LEDs are strategically distributed across 5 circumferential columns and a top optical array, eliminating dead angles in parabolic car tail housings.
  • Direct Air-Cavity Heat Dissipation: Constructed with an open structural aviation aluminum core, allowing thermal energy from the high-density emitter array to transfer straight to surrounding housing air without enclosed dome heat trap.
  • Comprehensive Discrete Voltage Range (10–30V DC): Robust solid-state driver architecture isolates LEDs from automotive voltage surges, ensuring stable lumen output in both 12V cars and 24V commercial rigs.
  • Intelligent Non-Polarity & CK/SRCK Wiring Compatibility: Built with an advanced bi-directional non-polarity rectification circuit. Works seamlessly in both standard 3157 sockets and factory CK/SRCK/SACK wired sockets (popular in Chevy Silverado, Ford, and Toyota Tundra) without blown fuses or inverted high/low filament functions.

⚠ Anti-Hyper Flash & Error Cancellation Recommendation (Load Resistor Selection)

The 31567-45L operates at a genuine energy-efficient 5.0W (high mode) without internal power-wasting load resistors to preserve maximum thermal longevity. When replacing traditional 27W filament bulbs on vehicles equipped with sensitive electronic monitoring, external gold aluminum-housed load resistors are recommended to prevent hyper-flashing or dashboard warnings:

• 12V Passenger Cars & Pickups: Parallel-connect one 25W 10Ω resistor across the signal wire and ground.
• 24V Commercial Transport & Trucks: Parallel-connect one 25W 27Ω resistor on monitored brake/turn channels.
*Note: Mount resistors to vehicle metal chassis for heat dissipation; never connect resistors to continuous low-beam tail wires.

Frequently Asked Questions

What is the difference between 3156 and 3157 bulbs, and does this bulb support CK/SRCK sockets?
The 3156 is single-filament (2-wire) for dedicated reverse or turn lights, while the 3157 is dual-filament (4-wire) for dual-mode brake/tail lights. Importantly, the 31567-45L features an intelligent non-polarity driver that is 100% plug-and-play in both Standard 3157 and CK/SRCK/SACK wired sockets, preventing blown fuses and inverted brightness common with traditional polarity-sensitive LED replacements.
Why does this 3157 bulb use an open aluminum body without a glass enclosure?
The open aviation aluminum heatsink allows the 45 high-efficiency SMD 2835 chips to dissipate heat directly into the vehicle lamp housing air cavity, maintaining stable junction temperatures and maximum sustained 500-lumen output during continuous braking.
Can this bulb withstand voltage fluctuations in heavy-duty American trucks?
Yes. Designed with a wide 10&ndash;30V DC constant-current driver, it easily handles alternator load dumps and voltage spikes common in 12V American pickup trucks (such as Ford F-150, Chevy Silverado) and 24V commercial haulers without flickering or premature LED burnout.
What is the sample MOQ and custom packaging procedure?
Samples are available from 5 pairs for evaluation. Custom retail packaging (5,000 pcs MOQ) can be pre-funded and held in inventory to be drawn down across repeat orders. Please refer to the Factory MOQ specifications above for full terms.