Battery Disconnect Pyrofuse
- Mfg Part #
- 4G0915519 4G0915519
- ECS Part #
- ES#5375824
- Brand
-
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Product Details
In modern Audi, Volkswagen, and Porsche electrical architectures, passenger safety during a collision extends beyond airbag inflation. To prevent catastrophic vehicle electrical fires caused by pinched starter cables or short-circuited alternators, the positive battery terminal is equipped with a Pyrotechnic Battery Disconnect Element (commonly known as a Pyrofuse, Pyroswitch, or Autoliv PSS-2). Part number 4G0915519 from Hamburg-Technic is an OEM-specification direct replacement for factory part numbers 4G0915519, 4G0915519B, and Porsche 95861120500.
Housed directly on the battery positive terminal distribution block (in the trunk floor, luggage compartment, or under the front driver's seat), this safety switch plays a vital role in crash mitigation and vehicle startup:
The Post-Collision "No-Crank, No-Start" Dilemma: During a collision where crash sensors trigger airbag or seatbelt pretensioner deployment, the Airbag Control Module (J234) simultaneously sends an electrical ignition pulse to this pyrofuse. A micro-pyrotechnic squib fires a non-conductive composite piston that physically shears through the solid internal copper busbar in less than 0.2 milliseconds. Once severed, the starter motor and alternator circuits are permanently disconnected. The dashboard cluster may light up, but the starter will not engage, click, or crank.
Cost-Effective Salvage & Collision Restoration: Dealerships frequently only sell this component as part of an expensive, complete battery cable harness assembly or integrated terminal block. This standalone Hamburg-Technic replacement allows repair shops and collision rebuilders to replace only the blown pyrofuse, drastically lowering repair costs.
Airbag Light & High Resistance Faults: Even in vehicles that have not suffered a collision, ambient moisture, corrosion, or vibration can degrade the squib’s internal wiring bridge. This causes the airbag control module to detect high squib circuit resistance, triggering an immediate SRS Airbag malfunction warning on the instrument cluster that prevents the vehicle from passing state safety inspections.
Persistent Diagnostic Trouble Codes (DTCs): A deployed or faulty battery pyrofuse registers active faults in Address 15 (Airbag / Restraint System):
B100B / B100B1B – Battery Disconnect Element: Resistance Too High
B100B13 – Battery Disconnect Element: Open Circuit
00588 / 00588 001 – Airbag Igniter; Driver/Battery Safety Pyrofuse: Upper Limit Exceeded
B1015 / B101500 – Battery Interrupt Igniter: Triggered / Deployed
02756 – Redundant Battery Disconnection Igniter: Short to Plus / Open
Features & Specs:
OEM-Matched Mechanical Dimensions: Direct slide-in fitment into the factory terminal fuse housing (7P0937548F / 8R0937548) with exact stud spacing for heavy-gauge power feeds.
True Fast-Acting Pyrotechnic Protection: Replicates OEM milliseconds-fast separation to protect downstream vehicle wiring harnesses and control computers from catastrophic short-circuit spikes.
Gold-Plated Squib Terminals: Resists contact oxidation to guarantee reliable resistance readings by the airbag control module.
This Part Fits the Following Vehicles
| Make | Model | Submodel | Engine | Special Fitment Notes |
|---|---|---|---|---|
| Audi | 8U Q3 | FWD | 2.0T | Use vehicle selector to confirm fitment |
| Audi | 8U Q3 | Quattro | 2.0T | Use vehicle selector to confirm fitment |
| Audi | A7 | C7 | 3.0 TDI | Use vehicle selector to confirm fitment |
| Audi | A7 | C7 | 3.0T | Use vehicle selector to confirm fitment |
| Audi | B8 A4 | FWD | 2.0T | Use vehicle selector to confirm fitment |
| Audi | B8 A4 | Quattro | 2.0T | Use vehicle selector to confirm fitment |
| Audi | B8 A4 | Quattro | V6 3.2L | Use vehicle selector to confirm fitment |
| Audi | B8 A5 | Quattro | 2.0T | Use vehicle selector to confirm fitment |
| Audi | B8 A5 | Quattro | V6 3.2L | Use vehicle selector to confirm fitment |
| Audi | B8 Allroad | Quattro | 2.0T | Use vehicle selector to confirm fitment |
| Audi | B8 RS5 | All | 4.2L | Use vehicle selector to confirm fitment |
| Audi | B8 S4 | Quattro | 3.0T | Use vehicle selector to confirm fitment |
| Audi | B8 S5 | Quattro | 3.0T Cabriolet | Use vehicle selector to confirm fitment |
| Audi | B8 S5 | Quattro | 3.0T Coupe | Use vehicle selector to confirm fitment |
| Audi | B8 S5 | Quattro | V8 4.2L | Use vehicle selector to confirm fitment |
| Audi | C7 A6 | FWD | 2.0T | Use vehicle selector to confirm fitment |
| Audi | C7 A6 | FWD | V6 3.0T | Use vehicle selector to confirm fitment |
| Audi | C7 A6 | Quattro | 2.0T | Use vehicle selector to confirm fitment |
| Audi | C7 A6 | Quattro | 3.0 TDI | Use vehicle selector to confirm fitment |
| Audi | C7 A6 | Quattro | V6 3.0T | Use vehicle selector to confirm fitment |
| Audi | C7 S6 | Quattro | 4.0T | Use vehicle selector to confirm fitment |
| Audi | C7 S7 | Quattro | 4.0T | Use vehicle selector to confirm fitment |
| Audi | D4 A8 | Quattro | 3.0 TDI | Use vehicle selector to confirm fitment |
| Audi | D4 A8 | Quattro | 3.0T | Use vehicle selector to confirm fitment |
| Audi | D4 A8 | Quattro | 4.0T | Use vehicle selector to confirm fitment |
| Audi | D4 S8 | Quattro | 4.0T | Use vehicle selector to confirm fitment |
| Audi | Q5 | Quattro | 2.0T | Use vehicle selector to confirm fitment |
| Audi | Q5 | Quattro | 3.0 TDI | Use vehicle selector to confirm fitment |
| Audi | Q5 | Quattro | 3.0T | Use vehicle selector to confirm fitment |
| Audi | Q5 | Quattro | 3.2L | Use vehicle selector to confirm fitment |
| Audi | RS7 | Quattro | 4.0T | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Base | V6 3.0L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Base | V6 3.2L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Base | V6 3.6L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Base | V6 3.6L M55.01 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Base | V6 3.6L M55.02 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Base | V6 3.6L MCE.YA | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Coupe | V6 3.0L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Coupe Platinum | V6 3.0L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Diesel | V6 3.0L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Diesel | V6 3.0L MCN.RB | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | E-Hybrid | V6 3.0L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | E-Hybrid Coupe | V6 3.0L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | E-Hybrid Coupe Platinum | V6 3.0L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | E-Hybrid Platinum | V6 3.0L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | GTS | V6 3.6L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | GTS | V6 3.6L MCX.ZA | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | GTS | V8 4.0L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | GTS | V8 4.8L M48.01 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | GTS | V8 4.8L M48.02 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | GTS | V8 4.8L M48.20 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | GTS | V8 4.8L M48.40 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | GTS | V8 4.8L M48.51 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | GTS | V8 4.8L M48.52 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | GTS | V8 4.8L M48.70 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | GTS Coupe | V8 4.0L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Platinum Edition | V6 3.0L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Platinum Edition | V6 3.6L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | S | V6 2.9L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | S | V6 3.6L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | S | V6 Turbo 3.6L MCU.RA | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | S | V8 4.0L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | S | V8 4.5L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | S | V8 4.8L M48.01 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | S | V8 4.8L M48.02 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | S | V8 4.8L M48.20 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | S | V8 4.8L M48.40 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | S | V8 4.8L M48.51 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | S | V8 4.8L M48.52 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | S | V8 4.8L M48.70 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | S Coupe | V6 2.9L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | S Coupe | V8 4.0L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | S Coupe Platinum | V6 2.9L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | S E-Hybrid | V6 3.0L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | S E-Hybrid Coupe | V6 3.0L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | S E-Hybrid Platinum | V6 3.0L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | S Hybrid | V6 3.0L M06.EC | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | S Hybrid | V6 3.0L MCG.FA | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | S Platinum Edition | V6 2.9L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Turbo | V8 4.0L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Turbo | V8 4.5L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Turbo | V8 4.8L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Turbo | V8 4.8L M48.01 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Turbo | V8 4.8L M48.02 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Turbo | V8 4.8L M48.20 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Turbo | V8 4.8L M48.40 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Turbo | V8 4.8L M48.51 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Turbo | V8 4.8L M48.52 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Turbo | V8 4.8L M48.70 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Turbo | V8 4.8L MCF.TB | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Turbo Coupe | V8 4.0L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Turbo E-Hybrid | V8 4.0L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Turbo E-Hybrid Coupe | V8 4.0L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Turbo GT Coupe | V8 4.0L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Turbo S | V8 4.5L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Turbo S | V8 4.8L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Turbo S | V8 4.8L M48.01 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Turbo S | V8 4.8L M48.02 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Turbo S | V8 4.8L M48.20 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Turbo S | V8 4.8L M48.40 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Turbo S | V8 4.8L M48.51 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Turbo S | V8 4.8L M48.52 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Turbo S | V8 4.8L M48.70 | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Turbo S E-Hybrid | V8 4.0L | Use vehicle selector to confirm fitment |
| Porsche | Cayenne | Turbo S E-Hybrid Coupe | V8 4.0L | Use vehicle selector to confirm fitment |
| Volkswagen | Touareg 3 | Hybrid | All | Use vehicle selector to confirm fitment |
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Items marked as 'Free Shipping' may qualify for free standard economy ground shipping to the contiguous United States (48 states). Oversized products and direct ship products are excluded from this offer unless otherwise noted.
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