2018-2023 BMW X3/X4 Engine / Transmission Module Wiring Harness 12538658843

OEM Part #: 12-53-8-658-843 (12538658843)

Engine / Transmission Module Wiring Harness 12538658843 for BMW

Actual photo

The exact part you’ll receive — not a stock photo.

$62.49

Used

Donor2019 BMW X4 · 2.0L · 82k miles

SKU: 536664 · 30-Day Returns

✓ Free Same Day Shipping on orders by noon CT

Only 2 in stock — no guaranteed restock

Engine / Transmission Module Wiring Harness 12538658843 — Used (SKU 536664)

Genuine OEM Used SKU: 536664 Donor Vehicle: 2019 BMW X4 · 2.0L · 82k miles 2 photos

$62.49

30-Day Returns

Engine / Transmission Module Wiring Harness 12538658843 — Used (SKU 705700)

Genuine OEM Used SKU: 705700 Donor Vehicle: 2019 BMW X3 · 2.0L 2 photos

$65.99

30-Day Returns

Genuine OEM — real photos
30-day returns on eligible parts
eBay Top Rated · 100,000+ positive ratings
Ships from our own indoor warehouse

This BMW engine/transmission module wiring harness (OEM 8658843, also replaces 12538658843) is a used genuine part removed from a donor vehicle. It connects the engine and transmission control modules to sensors and actuators in 2.0L turbocharged four-cylinder models. Also called a powertrain wiring harness, a failing one often causes intermittent communication faults, misfires, or erratic shifting.

Specifications

Specifications for Engine / Transmission Module Wiring Harness 12538658843
Fits Vehicle Model	X3, X4
Fits Vehicle Make	BMW
OEM Part No	12-53-8-658-843 (12538658843)
Compatible OEM Part No	12-53-8-658-843
Category	Other

Compatible Vehicles

Fits 10 vehicle configurations across 1 make, 2018-2023.

Check your specific vehicle before ordering. This list shows year, make, and model. Some years have multiple trims or engines that use different parts, and individual listings may have additional fitment notes (e.g. “with sunroof only”). Review the full variant list below, or message us with your VIN and we’ll confirm the match.

BMW

X3 2018-2022 · 5 variants
X4 2019-2023 · 5 variants

View all 10 vehicle configurations

Full vehicle fitment list for Engine / Transmission Module Wiring Harness 12538658843
Year	Make	Model	Trim	Engine
2022	BMW	X3	SUV	2.0L l4 Turbo
2020	BMW	X3	SUV	2.0L l4 Turbo
2018	BMW	X3	SUV	2.0L l4 Turbo
2019	BMW	X3	SUV	2.0L l4 Turbo
2021	BMW	X3	SUV	2.0L l4 Turbo
2022	BMW	X4	SUV	2.0L l4 Turbo
2023	BMW	X4	SUV	2.0L l4 Turbo
2020	BMW	X4	SUV	2.0L l4 Turbo
2019	BMW	X4	SUV	2.0L l4 Turbo
2021	BMW	X4	SUV	2.0L l4 Turbo