News

What Changed for 2026

For the 2026 model year, John Deere — alongside Toyota, Ford, and GM — tightened CKP signal integrity tolerances to meet updated SAE J1939-76 diagnostic protocol requirements for off-highway equipment. A sensor that passed diagnostics last season can now set codes it used to slip past.

The MIA11672 answers that shift with a neodymium (NdFeB) magnet core and fluorocarbon rubber (FKM) sealing. It handles continuous thermal cycling from -40°C to +150°C and is built to IATF 16949:2026 quality management benchmarks.

Output is a square-wave Hall-effect signal that feeds the ECU with real-time crankshaft angular velocity and TDC reference data across the CAN-bus physical layer specified under ISO 11898-2:2026.

Three Upgrades That Separate This Sensor From Legacy Units

1. Neodymium Magnet Core (NdFeB, Grade N48H)

Ferrite-based VR sensors suffer signal degradation at low RPM. The MIA11672's N48H neodymium magnet holds coercivity above 1,200 kA/m at 150°C, which delivers true zero-speed detection.

That matters for the 2026 Gator XUV 825i start-stop sequence, where the ECU must register crankshaft position within the first compression stroke to comply with Tier V evaporative emission standards anticipated for off-highway utility vehicles.

2. Fluorocarbon (FKM) Sealing System

A dual-lip FKM seal handles continuous exposure to SAE 10W-30 and 15W-40 engine oils, with an intermittent rating up to 175°C. Earlier nitrile (NBR) seals on the 590E/590i/590M platforms degraded under crankcase blow-by contaminants and triggered P0336 range/performance codes within 300–500 hours. This seal targets that known failure mode.

3. Triple-Shielded Harness and EMC Immunity

2026 OEM ECUs (Bosch ME17.8.x and Delphi MT92 variants) run at higher clock speeds, making electromagnetic interference a documented failure vector for CKP circuits.

The MIA11672 combines a braided copper shield, aluminized Mylar wrap, and a ferrite bead at the connector shell. That stack suppresses radiated emissions from adjacent ignition coils and alternator fields, achieving ISO 11452-4 BCI immunity up to 200 mA across 1–400 MHz.

Spec Comparison: MIA11672 vs. the Alternatives

The short version: generic units vary, and legacy VR hardware cannot detect zero speed at all.

OEM Cross-Reference and Material Standards

One sensor, three part numbers. Buy against whichever your system uses:

• John Deere OEM: MIA11672
• Aftermarket equivalent: 4D-1392
• Engine-side (Chery): S11-1005117

The FKM sealing meets ASTM D2000 M2HK714 A1-10 B38 for fluorocarbon elastomers in continuous oil exposure. The magnet core is sourced to MMPA 0100-00 Standard Specifications for Permanent Magnet Materials, Grade N48H.

Sub-tier compliance covers SAE J2716 (SENT protocol readiness), though the Gator ECU currently runs TTL square-wave output. DTC definitions align with the SAE J2012-DA Digital Annex, 2026 release.

Service Life and Production Outlook

Expect 2,000 operating hours or 5 calendar years, whichever comes first, per John Deere's published 2026 Gator maintenance schedule. That projection assumes proper installation with air-gap verification using a non-magnetic brass feeler gauge.

The sensor is forecast to stay in active production through the 2030 model cycle, covering all 812cc Chery SQR372-equipped Gators (825i, 825i S4) plus the 590-series platforms.

Run a mixed fleet? Koeep also stocks the 2X 23731-6N21A Camshaft Crankshaft Position Sensor for 02-06 Nissan Altima 2.5L and the Crank Angle Position Sensor for Nissan Z31 300ZX 3.0L VG30E (1985–1989). For the wider electrical catalog, browse the Starters, Alternators & ECUs collection.

DTC Mapping: P0300–P0399 Ignition and Misfire Domain

The MIA11672 is the primary resolution component for these codes in the 2026 Gator XUV ECU (Bosch ME17.8.7 variant):

• P0335 — CKP Sensor "A" Circuit (open, short, or implausible)
• P0336 — CKP Sensor Range/Performance (tooth error, gap deviation)
• P0337 — CKP Sensor Low Input (signal short to ground)
• P0338 — CKP Sensor High Input (signal short to VRef)
• P0339 — CKP Sensor Intermittent (harness or connector fretting)
• P0016 — Crank-Cam Correlation (may resolve with CKP replacement if the cam sensor is verified good)

Field Diagnostics: What Each Code Means on Your Gator

P0335 — Crankshaft Position Sensor "A" Circuit

Typical symptoms on a 2026 Gator 825i: intermittent no-start, sudden stall at operating temperature, and a MIL with freeze-frame data showing 0 RPM during cranking.

Work the path in order:

1. Verify 5V reference at Pin 1 with the key on.
2. Backprobe Pin 2 for a clean 5V square wave during cranking — use a lab scope, not a multimeter.
3. Measure the air gap at the reluctor wheel. Spec is 0.5–1.5 mm; deviation beyond 2.0 mm will produce P0335.
4. Inspect the MIA11672 sensor connector for terminal fretting corrosion — a documented concern on 590-series Gators run in high-humidity environments.

P0336 — Range/Performance

Root causes on 2026 models: reluctor wheel tooth damage, excessive crankshaft endplay, or seal failure letting oil contaminate the Hall-effect element. Replace the sensor — do not clean it. The Hall IC is hermetically bonded, and solvent ingress permanently damages the ASIC.

P0339 — Intermittent Signal

On the XUV 825i S4 (4-passenger), harness routing near the firewall is a chafing point. Intermittent P0339 codes that appear only on rough terrain are frequently harness-related, not sensor failures. Inspect the wiring between the CKP connector and ECU Pin C2-17 before replacing anything.

No-Code Hard Starts on 590E / 590i / 590M

The sensor can drift above its internal-resistance target — below 1.2 kΩ across Pin 1–3 — without setting a DTC. You get extended crank times of 3–5 seconds while the ECU defaults to cam-position-only synchronization. If your 590-series Gator cranks long with no MIL, measure CKP resistance before touching the fuel system.

Frequently Asked Questions