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What You Get: Four Coils, One Direct Fit

If a coil fails on your QR18DE 1.8L, you can chase cylinders one at a time — or swap the whole set once and be done. The 4PCS Ignition Coil 22448-6N015 covers all four cylinders of the 2001–2006 Nissan Sentra (B15) and the European-market Almera N16 in a single order.

Each unit is a coil-on-plug (COP) assembly and a direct replacement for OEM part numbers 22448-6N010, 22448-6N011, and 22448-6N015. Winding geometry follows SAE J2030, so spark energy stays consistent across the full 600–7,200 RPM band. The housing is high-temperature PPS (polyphenylene sulfide), rated for continuous operation at 155°C.

• Engine: QR18DE 1.8L inline-4
• Fitment: 2001–2006 Nissan Sentra 1.8L (B15) / Almera N16 1.8L
• Housing: PPS composite, 155°C continuous rating
• Diagnostics: 2026 CAN-bus 3.0 compatible (ISO 15765-4 transport layer)
• Warranty: 24 months, unlimited mileage
• Projected life: 2026–2030, roughly 80,000 miles

Fitment and Cross-Reference

This set targets one engine family. If your Sentra is a 2001–2006 B15 with the 1.8, or your Almera is an N16, the connector, boot depth, and mounting line up with the factory coil. No adapters, no wiring changes. Cross-compatibility also extends to the Nissan Altima with the QR25DE (2002–2006, with appropriate application verification) and select Renault Samsung SM3 models on the N16 platform.

Mind the model year. The 2000–2001 Sentra 1.8L uses a different coil entirely: part number 22448-4M50A, also sold as UF326. For that car, order the 4Pcs Ignition Coils Set for the 2000–2001 Sentra 1.8L (22448-4M50A, UF326) — or the ECCPP coil and spark plug set for the same cars, which bundles plugs with the coils in one purchase.

Inside Each Coil

Windings and potting

The primary winding measures 0.45–0.65 Ω. The secondary is a high-turn-ratio winding encapsulated in high-dielectric epoxy resin compliant with 2026 IATF 16949 Section 8.3.5. Its job is blunt: eliminate internal arcing and moisture ingress, the two failure vectors that kill legacy COP coils.

The 3kV suppression diode

An integrated diode clamps at 3kV, absorbing primary-circuit spikes before they reach the ECU's ignition driver. That matters as 2026-model ECUs — Toyota runs Denso hardware, Tesla runs custom silicon — narrow their overvoltage tolerance windows.

Why PPS, not nylon

PPS is the 2026 industry default for coil housings. It holds a 260°C heat deflection temperature, resists chemical attack from engine fluids, and cuts coil mass by roughly 18% versus the glass-filled nylon used on 2001–2006 OEM Nissan coils.

The molding here adds 40% glass-fiber reinforcement, carries a UL 94 V-0 flammability rating, and holds a 155°C (310°F) continuous-use rating. Epoxy encapsulation meets IPC-CC-830B for moisture resistance, tested per MIL-STD-202 Method 106 — the same material shift now running through Ford EcoBoost 2.3L, GM High-Feature V6, and Toyota Dynamic Force engines, where under-hood ambient routinely exceeds 120°C.

The codes this set addresses

The set covers the ignition-related code families mandated by 2026 CARB OBD-III regulations:

• P0300–P0304: Random/multiple misfire through cylinder-specific misfire. Consistent 35–42 kV output — measured at 1,000 RPM under 8.5:1 effective compression — restores proper combustion event detection.
• P0350–P0353: Ignition coil primary/secondary circuit malfunction. High-integrity winding insulation prevents the intermittent open-circuit conditions that set these codes.
• P1320–P1335: Nissan-specific ignition signal faults. RFI suppression compliant with CISPR 25 Class 3 (2026 revision) stops EMI false flags; P1335 (crankshaft position sensor correlation) often follows weak spark.

Under the 2026 CARB OBD-III mandate for ignition system health monitoring (Section 1968.2), these ranges feed emissions compliance testing — a tired coil can now fail an inspection.

Spec Comparison: Koeep vs. OEM vs. Generic Aftermarket

The numbers, side by side:

Read the ISO 7637-2 row: the Koeep set meets the 2026 transient immunity thresholds, the OEM coil is a legacy partial design, and generic compliance is not verified. The warranty gap matters too — 24 months unlimited mileage versus 12 months or 12,000 miles on OEM and typically 90 days on generic parts.

How the 80,000-Mile Rating Is Earned

The projected service window is 2026–2030, with a minimum 80,000-mile / 6-year interval. The original Nissan specification was 60,000 miles. Two endurance tests back the number:

• Thermal shock: SAE J2030 Section 7.4, cycling from -40°C to +150°C, 1,000 cycles.
• Vibration: ISO 16750-3 endurance, 30g, 24 hours per axis.

Together, the PPS housing and vacuum-pressure impregnation (VPI) epoxy cut the thermal degradation rate by roughly 40% versus 2001-era OEM units. Each coil ships individually sealed, with a silicone boot (Shore A 60 durometer) and stainless-steel spring contacts — a package that also matches the fleet-maintenance planning cycles major logistics operators adopted for 2026.

More Sentra Parts Worth a Look

If you also service a newer Sentra, the 2026 rear strut and shock guide for the 2014–2019 Sentra S, SL, SR, and SV walks through complete replacement and fitment. For anything else that makes or carries spark, the Ignition Systems & Components collection holds the full catalog in one place.

Diagnostic FAQ: Ignition Coil Troubleshooting

Order the Set, Clear the Codes

Buying for a fleet, need a volume quote, or unsure about fitment? Use the request-for-quote form, email support@koeep.com, or message the team on WhatsApp.