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2026 compliance in plain numbers

Before you buy any IAC valve for a current-generation ECU, check the electrical and diagnostic basics. The D5184 data sheet specifies:

• 4-pin PWM stepper driver, compatible with CAN 3.0 FD (Flexible Data-rate) gateways running at 5 Mbps
• Mode $04 (clear DTC), Mode $07 (pending DTCs), and Mode $09 (VIN/calibration) support per the 2026 ISO 15031-5 update
• Coil resistance of 10-14 Ω per phase at 20°C, per the SAE J1211 thermal specification
• Housing rated 150°C continuous, 180°C transient
• 12V DC nominal operation across a 9-16V range, compatible with a 2026 48V mild-hybrid DC-DC supply

One spec needs clarification: the D5184 is a standalone actuator. The ECU idle-speed driver circuit controls it directly, and it does not join the CAN network as a node. Its 12-15 mH coil inductance and internal TVS flyback diodes keep interference off a CAN 3.0 FD bus sharing the harness, validated to CISPR 25:2026 Class 5 limits.

Idle control also has to absorb alternator load swings, so the charging system and the valve work as a pair. If you service Lancers and want the charging side covered, read the complete guide to the alternator for the Mitsubishi Lancer Evolution Final Edition 2015.

Which vehicles the D5184 fits

Fitment runs from the Mitsubishi Lancer (2007-2021) across the Chinese-market sedans, hatchbacks, and small commercial vehicles that share this idle-control architecture:

• Mitsubishi Lancer (2007-2021)
• BYD F3, G3, L3
• Geely CK, FC, MK
• Chana Benni, Star
• Chery QQ6, Tiggo
• Dongfeng S30, H30

If your fleet also includes Hafei or Zotye models, Koeep carries a companion idle speed actuator covering Mitsubishi, BYD, Geely, Chana, Chery, Hafei, CK, and Zotye applications, so one supplier can fill the whole idle-control shelf. For other wear items on the same platforms, the full auto and motorcycle parts collection groups everything in one place.

Cabin-side Mitsubishi jobs come up too. Koeep also lists the MR228113 clock spring for the Mitsubishi Mirage 1997-2002, without cruise control, useful when a Mirage electrical diagnosis lands on your bench.

The three changes that define the 2026 unit

The D5184 moves past legacy glass-filled nylon IAC valves on three fronts, and each change maps to a failure you have probably seen at the bench.

PPS composite housing rated to 150°C

The stator housing uses polyphenylene sulfide (PPS) composite, rated for continuous exposure at 150°C with transient tolerance to 180°C. That headroom matters on downsized turbo engines such as the BYD 476ZQA and Geely JLγ-4G15, where under-hood thermal soak routinely passes 140°C.

PPS absorbs zero moisture, so the housing never swells the way nylon does. Swelling is what binds the pintle in high-humidity climates, and removing that failure mode is why the material made the 2026 spec.

A 125-step motor that holds ±15 RPM

At the core sits a 125-step bipolar stepper motor with a 7.2° step angle. With 1/5 micro-stepping driven by ECU PWM, the pintle gets 625 discrete positions across its 10 mm stroke.

That granularity lets the ECU hold idle within ±15 RPM of target, the working range 2026 start-stop systems need. BYD BSG and Chery ACTECO Start/Stop packages demand rapid, precise idle recovery after every restart. An anti-backlash worm gear removes the hunting idle that worn units produce.

Coverage of the full P0505-P0511 family

The D5184 addresses every code in the IAC diagnostic range as defined by ISO 15031-6 (2026 Edition). The mapping:

Full D5184 specification sheet

Verify your OEM number against these values before you order. Every figure comes from the D5184 technical data.

The thermal numbers trace to SAE J1211 for under-hood electronics and ISO 16750-4:2026 (Road Vehicles, Environmental Conditions, Section 5.1.2, Thermal Shock).

Every OEM number the D5184 replaces

The consolidated SKU covers 12+ individual part numbers. Match yours here:

• Mitsubishi: MD628102, MD614717
• BYD: F3-1107710, BYD-G3-AC04
• Geely: MR479Q-1107710, 1014000999
• Chana: 465Q-1107710
• Chery: S11-1107710, A15-1107710
• Dongfeng: 30-H30-IAC, EQ486-1107710

Each cross-referenced unit keeps exact fit and function parity with its OEM original, so inventory shrinks without fitment risk. If a number on your invoice is missing from this list, send it through the request for quote page and Koeep will match it against the catalog.

Bench checks before you order

Read the scan data first

Connect a scan tool that supports Mode $01 PID $11 (IAC commanded position). Warm engine, A/C off: commanded position should sit at 30-50 steps. A/C on: position should climb to 70-100 steps within 300 ms. If the reading moves and RPM does not, the pintle is mechanically stuck.

Measure the coils

Disconnect the 4-pin connector and measure Pin 1-2 (Phase A) and Pin 3-4 (Phase B). Both phases should read 10-14 Ω at 20°C. Above 18 Ω on either phase means internal coil degradation, which is what triggers intermittent P0511 on Chery ACTECO engines.

Inspect the bypass port

P0507 on Geely CK/FC/MK platforms (MR479Q engine) usually means carbon stops the pintle from seating at 0-step, leaving a vacuum leak equal to a 2-4% throttle opening.

Remove the valve and check the port in the throttle body. Heavy fouling calls for a throttle-body-safe solvent. A clean port points at the valve itself. After a new unit goes in, a commanded 0-step should hold 650-750 RPM warm, against the MR479Q target of 700 ±50 RPM.

Installation and idle relearn

The D5184 is a direct electromechanical replacement. No ECU reprogramming is needed; the ECU detects the correct operating range within 2-3 drive cycles. A manual relearn still helps, and Koeep recommends it on every platform.

For the BYD F3 with the Bosch ME7.8.8 ECU, run this sequence:

1. Disconnect the battery negative terminal for 5 minutes.
2. Reconnect and turn the key to ON without starting. Wait 30 seconds.
3. Turn the key OFF for 10 seconds.
4. Start and idle with all accessories off for 10 minutes, or until the radiator fan cycles twice.

The shorter generic version is: key ON for 10 seconds, key OFF for 10 seconds, then start and idle for 5 minutes with no load. No scan tool is required for either procedure.

Verification after the swap: clear stored codes with Mode $04, drive two complete OBD-II drive cycles, then check Mode $07 for pending codes. P0505 through P0511 should stay gone.

Frequently asked questions