PHILIPS SX-2851 Indicator Light Bulb Testarossa Automatic Uv

( Brand: Philips ), ( Manufacturer Part Number: SX-2851 ), ( Placement On Vehicle: Electrical Lighting Body Lighting Instrumentation ), ( Type: Automatic Transmission Indicator Light Bulb ), ( Item Width: 2.760 ), ( Item Height: 0.510 ), ( Item Length: 3.860 ), ( Manufacturer Warranty: 3 Months / 1 Year / 2 Years Depending On Part ), ( Ipn: C803 86-57 ), ( Compatible Model: Testarossa ), ( Compatible Year: 1989 1988 1987 1986 1985 ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement ), ( Bundle Description: 1 Pc Genuine Philips Automatic Transmission Indicator Light Bulb )

Review PHILIPS Indicator Light Bulb Ferrari Testarossa Automatic Uv fits 1985–1989

The **Philips SX-2851 Indicator Light Bulb** is a meticulously engineered, high-performance replacement designed specifically for the iconic **Ferrari Testarossa (1985 1989, automatic transmission models)** a masterpiece of Italian automotive craftsmanship. Engineered to meet the exacting standards of Ferrari s legendary rear indicator system, this bulb combines precision optics with robust durability to ensure flawless visibility and reliability, even under the most demanding driving conditions. Crafted with a **UV-resistant, long-life halogen filament**, the SX-2851 delivers a bright, crisp white light output that enhances visibility without compromising the Testarossa s signature aesthetic. Its **P21/5d base** ensures a secure, vibration-resistant fit within the vehicle s indicator housing, preventing premature failure and maintaining optimal signal clarity critical for both safety and the car s timeless presence on the road. Whether navigating winding mountain roads or cruising through urban landscapes, this bulb guarantees consistent performance, mirroring the reliability of the Testarossa s legendary V12 engine. For enthusiasts who demand nothing less than perfection in their Ferrari, the Philips SX-2851 is the ideal choice a seamless blend of functionality and heritage, designed to preserve the spirit of one of automotive history s most revered models.

### Pros and Cons of buying a Philips SX-2851 Indicator Light Bulb for a Ferrari Testarossa (1985 1989 Automatic, UV)

1. **Compatibility** The Philips SX-2851 is a standard indicator bulb (yellow, 12V, 21W) designed for automotive use, including European vehicles like the Ferrari Testarossa. It fits the standard indicator socket found in the 1985 1989 models, particularly the automatic transmission variants with UV (Unified Vehicle) wiring.

2. **Brightness and Visibility** Philips bulbs are known for their consistent brightness and clear visibility, which is crucial for safety, especially in low-light conditions or during nighttime driving. A well-lit indicator ensures other drivers can see your turns clearly.

3. **Durability** Philips bulbs are generally reliable and long-lasting, often outperforming generic or low-quality alternatives. They are designed to withstand vibrations and temperature fluctuations common in high-performance vehicles like the Testarossa.

4. **Easy Installation** The bulb is straightforward to replace no special tools or modifications are required. The Testarossa s indicator sockets are accessible, making it a quick DIY job for most mechanics or enthusiasts.

5. **Widely Available** Philips bulbs are sold in most automotive stores, online retailers, and bulk packs, ensuring easy replacement if one fails prematurely. They are a common OEM (Original Equipment Manufacturer) or aftermarket standard.

6. **UV Compatibility** The 1985 1989 Testarossa (especially automatic models) uses the UV wiring harness, which is compatible with standard indicator bulbs like the SX-2851. This bulb will integrate seamlessly without requiring additional wiring changes.

7. **Cost-Effective** While not the cheapest option, Philips bulbs offer a balance between affordability and quality. They are significantly cheaper than OEM replacements (if available) and more reliable than no-name brands.

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1. **Color Accuracy** The Philips SX-2851 emits a yellowish light, which is standard for indicator bulbs. However, some Ferrari owners prefer amber or white LED indicators for a more modern or visually distinct look. If aesthetics are a priority, this bulb may not meet those expectations.

2. **Lifespan Limitations** Like all incandescent bulbs, the Philips SX-2851 has a finite lifespan (typically 500 1,000 hours). While this is acceptable for most drivers, frequent replacements may be necessary over time, especially if the vehicle is driven frequently.

3. **No LED Upgrade Path** If you eventually want to upgrade to LEDs for better visibility, brightness, or longevity, the Philips bulb is not a direct LED replacement. You would need to source an LED indicator bulb specifically designed for the Testarossa s socket, which may require additional wiring or a relay.

4. **Potential for Flickering** In some vehicles, indicator bulbs can flicker due to electrical issues (e.g., loose connections, faulty flasher relay, or wiring problems). While the Philips bulb itself is unlikely to cause flickering, it may exacerbate existing electrical issues if they are present.

5. **Environmental Impact** Incandescent bulbs are less energy-efficient than LEDs and contain materials that are not easily recyclable. If sustainability is a concern, this may be a minor drawback compared to LED alternatives.

6. **Limited Customization** Unlike LED bulbs, which can often be dimmed or colored, the Philips SX-2851 offers no customization options. The light output is fixed to a standard yellow hue.

7. **Potential for Overheating in Confined Spaces** In some Testarossas, indicator bulbs are housed in tight spaces near other electrical components. While rare, prolonged use in a poorly ventilated area could theoretically lead to overheating, though this is unlikely with a standard bulb like the Philips SX-2851.

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The Philips SX-2851 indicator bulb is a **reliable, practical, and cost-effective choice** for a 1985 1989 Ferrari Testarossa (automatic, UV) if your priorities are functionality, compatibility, and ease of use. It meets the vehicle s electrical requirements, provides adequate visibility, and is easy to install. However, if you are considering long-term upgrades (e.g., LEDs for better brightness or aesthetics) or have specific visual preferences (e.g., white or amber indicators), you may want to explore alternative options later.

For most owners who prioritize **simplicity and reliability**, the Philips SX-2851 is an excellent **immediate solution**. It avoids the complexity of retrofitting LEDs or dealing with poorly performing generic bulbs, making it a **recommended choice** for standard indicator replacement.

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- You need a **direct, no-fuss replacement** for a failed or missing indicator bulb.

- You want a **proven, high-quality bulb** that matches the vehicle s original specifications.

- You prioritize **brightness, durability, and ease of installation** over customization.

- You plan to address LED upgrades or wiring issues **separately** in the future.

- You want **longer bulb life, better visibility, or a modern look** (e.g., white LEDs).

- You are open to **minor wiring adjustments** (e.g., adding a relay for LED compatibility).

- You prefer **customizable lighting** (e.g., amber or dimmable options).

For the average owner, the Philips SX-2851 strikes the best balance between **performance, cost, and convenience** for the Testarossa s indicator system.

Details:

Philips Indicator Light Bulb for Ferrari Testarossa 1985 - 1989 Automatic uv: Status: In Stock.

part #: sx2851 price

• $16.75

specifications interiorlightsot:

• for makes: Ferrari
• for years: 1985-1989
• brand: Philips
• mpn: Sx-2851
• placement on vehicle: Electrical Lighting Body Lighting Instrumentation
• type: Automatic Transmission Indicator Light Bulb
• item width: 2.760
• item height: 0.510
• item length: 3.860
• manufacturer warranty: 3 Months / 1 Year / 2 Years Depending On Part
• ipn: C803 86-57
• compatible model: Testarossa
• compatible year: 1989 1988 1987 1986 1985
• core charge: Free No Core Charge
• fitment type: Direct Replacement
• bundle description: 1 Pc Genuine Philips Automatic Transmission Indicator Light Bulb

shipping interiorlightsot:

• cost: $0.00
• class: Standard, Expedited
• transit: 2-6 Days
• service: Standard, Expedited
• type: Fixed

returns interiorlightsot:

• policy: Returns Accepted
• paid by: Seller
• time: 30 Days

offer interiorlightsot:

• quantity: 3
• started: April 16, 2026
• options: Ship-to-home
• sold: 0
• availability: In Stock

payments interiorlightsot:

• credit card: Discover
• other
• wallet: Google-pay

seller interiorlightsot:

• rating: 99.6%
• city: Indianapolis, Indiana
• # reviews: 645825

general interiorlightsot:

• condition: New
• Car Truck Parts Accessories > Lighting Lamps > Interior Light Assemblies

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