Product Description
The NGK Spark plug (5637), also widely known by its factory stock code BP6ET, is an original-equipment-quality multi-ground ignition component engineered by NGK. Installed directly into the cylinder head combustion chambers, its primary function is to ignite the compressed air-fuel mixture via a high-voltage electrical spark. Featuring a specialized 3-ground electrode layout, this plug optimizes spark propagation by allowing the electrical arc to naturally path across the cleanest path, substantially reducing misfires, ensuring stable engine idling, and preventing carbon fouling during persistent urban stop-and-go driving.
Product Specifications
- Manufacturer: NGK
- Designation / Type: BP6ET
- Stock Number: 5637
- Product Condition: New
- Thread Size / Diameter [mm]: 14
- Thread Length [mm]: 19 (3/4" Reach)
- Spanner / Hex Size [mm]: 20.8 (13/16")
- Spark Position [mm]: 7
- Electrode Configuration: 3-Ground Electrodes (Multi-ground design for prolonged service life)
- Core Material: Copper Core for maximum thermal conductivity and heat dissipation
- Terminal Type: Removable SAE nut configuration
- Technical Features: Corrugated ribs to prevent flashover; pure alumina silicate ceramic insulator provides superior dielectric and mechanical strength.
Vehicle Compatibility
The BP6ET multi-ground spark plug is a historical benchmark component custom-matched to standard 4-cylinder, 8-valve (8V) naturally aspirated carburetted and fuel-injected engine lineages across the classic Volkswagen Group (VAG) model network:
| Car Model | Compatible Engines / Variants | Engine Power (hp / kW) | Year of Manufacture |
|---|---|---|---|
| VW Golf II (19E, 1G1) / Jetta II (19E) | 1.6 / 1.6 Cat / 1.8 / 1.8 Syncro / 1.8 GTI (Classic 8V setups like the EZ, GU, RP, PB, and PF codes) |
72 - 112 hp / 53 - 82 kW | 1983 - 1992 |
| VW Golf III (1H1) / Vento (1H2) / Variant Estate | 1.8 / 2.0 / 2.0 GTI (8-valve powerplants including ABS, ADZ, and 2E codes) |
90 - 115 hp / 66 - 85 kW | 1991 - 1995 |
| VW Passat B2 (32B) / B3 & B4 (3A2, 35I) | 1.6 / 1.8 / 2.0 (Standard 4-cylinder single and multi-point injection platforms) |
72 - 115 hp / 53 - 85 kW | 1982 - 1996 |
| AUDI 80 B2 & B3 (81, 85, 89, 8A) / AUDI 100 C3 | 1.6 / 1.8 / 1.8 S / 1.8 E / 2.0 / 2.0 E | 75 - 115 hp / 55 - 85 kW | 1982 - 1991 |
| SEAT Ibiza II (6K1) / Cordoba (6K1, 6K2) / Toledo I (1L) | 1.6 i / 1.8 i / 2.0 i (Standard 8-valve variants) | 71 - 115 hp / 52 - 85 kW | 1991 - 1999 |
⚠️ Critical Engine Management Note: This spark plug is specifically balanced for mid-range operating temperatures (NGK Heat Range 6) on vintage 8-valve (8V) engines. It will NOT fit high-performance multi-valve layouts (such as the 1.8 GTI 16V, 2.0 16V, VR6, or later 20V Turbo engine platforms), which require entirely different structural thread sizes, distinct terminal extensions, or colder heat ratings to counter high cylinder pressures. Always inspect your factory code manual prior to ordering.
Original Equipment Manufacturer (OEM) Reference Numbers
This premium replacement multi-ground ignition component directly replaces or satisfies factory catalog options from the following assembly manifests:
- VAG (VW / AUDI / SEAT / SKODA): 101 000 001AA, 101000001AA, 101 000 005AA, 101000005AA, 101 000 007AA, 101000007AA, 101 000 031AA, 101000031AA
- NGK: BP6ET, 5637