# Osram Ultra Life PY21W BAU15s 21W 12V Automotive Signal Light Bulb

**URL:** https://aio.lv/en/product--osram-4008321413147--12465671
**Data updated:** 2026-05-18 09:44 (EEST)
**Category:** Car Supplies
**Manufacturer:** osram
**Manufacturer code:** 4008321413147
**EAN:** 4008321413147
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 5.99 €
**Prices and availability valid until:** 2026-07-17 23:59
**Price without VAT (21%):** 4.95 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--osram-4008321413147--12465671

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 08.07.2026 | free |
| Pickup points | 13.07.2026 | 1.99 EUR |
| Courier delivery to door | 13.07.2026 | 4.99 EUR |

## Summary description

The Osram Ultra Life PY21W signal bulb is a high-durability automotive lamp designed for turn signals. Featuring a BAU15s base and 21W power output, this 12V bulb provides reliable performance and long service life. Ideal for drivers seeking a durable replacement for standard indicator lights, it ensures clear visibility and safety on the road. This single-pack bulb is engineered for consistent illumination and easy installation in compatible vehicle lighting systems.

## Long description

The Osram Ultra Life PY21W BAU15s signal light bulb is a high-performance automotive lamp engineered for exceptional durability and consistent illumination. Designed specifically for turn signal applications, this 12V bulb provides a reliable lighting solution for drivers who prioritize longevity and safety. With its robust construction, it serves as an ideal replacement for standard indicator bulbs, ensuring that your vehicle's signaling remains clear and visible under various driving conditions.
Advantages
The primary benefit of the Osram Ultra Life series is its extended service life, which significantly reduces the frequency of bulb replacements. This durability is achieved through high-quality manufacturing standards that ensure the bulb withstands the vibrations and thermal stresses common in automotive environments. By choosing this product, drivers benefit from a dependable light source that maintains consistent brightness throughout its operational lifespan, contributing to safer road signaling and reduced maintenance efforts.
Suitable for
Vehicle turn signal indicators
Replacement of standard amber indicator bulbs
Drivers seeking long-lasting automotive lighting components
When it may not be suitable
This bulb is not intended for use in lighting systems that require a different base type or wattage, such as headlights or interior cabin lights. It is specifically designed for amber signal applications and should not be used where clear light output is required.
Key specifications
Base type: BAU15s
Voltage: 12V
Power: 21W
Light color: Amber
Quantity: 1 bulb per pack
How to use
To install the bulb, ensure the vehicle's ignition and lighting system are switched off. Access the indicator light housing according to your vehicle's manual. Remove the old bulb by gently pressing and turning it counter-clockwise. Insert the new Osram Ultra Life bulb into the socket, aligning the pins, and turn it clockwise until it locks securely into place. Test the turn signal before driving to ensure proper functionality.
What to consider before purchase
Verify that your vehicle's socket is compatible with the BAU15s base type.
Check your vehicle owner's manual to confirm the required wattage and voltage specifications.
Ensure that the amber color is appropriate for your specific vehicle's indicator lens.
Usage recommendations
For optimal performance and safety, it is recommended to replace signal bulbs in pairs to ensure uniform brightness and color intensity on both sides of the vehicle.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.0081 kg |
| Package weight | 2 g |
| Height | 18 mm |
| Input voltage | 21 |
| Width | 17 mm |
| Depth | 19 mm |
| Diameter | 25 mm |
| Luminous flux | 280 lm |
| Base type | BAU15s |
| Bulb lifetime | 1000 h |
| Quantity per pack | 1 pc(s) |

## FAQ

### How much does the Osram Ultra Life PY21W BAU15s Signal Bulb cost, and is it available for purchase?

The price is 5.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 08.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All osram products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized osram service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### Where can I download the instructions for Osram Ultra Life PY21W BAU15s Signal Bulb?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/12465671/68790654_large.webp