The 2018 BMW 520I has 18 electrical parts with verified fitment on this page — 5 part types and 4 brands, covering the 2.0L L4 Turbocharged engine. Each part includes a manufacturer part number and application notes.
On the 2018 BMW 520I, the electrical system covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors. 16 parts of the 18 listed are Horn (12 parts), Lighting Control Module (LCM) (2 parts) and Parking Aid Sensor (2 parts). The other 2 part types cover the remaining 2 parts.
Every part on this page is matched to the 2.0L L4 Turbocharged — the only engine offered in the 2018 BMW 520I.
The most listed brands for 2018 BMW 520I electrical parts are FIAMM (12 parts), MARELLI (4 parts) and HELLA (1 part), plus 1 more brand. Quality grades include Accessory Replacement and Standard Replacement.
3 parts on this 2018 BMW 520I page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including FIAMM 7210223 (Horn) and FIAMM 7201223 (Horn). Click any part number to see every vehicle that part fits.
Horn
Accessory Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FIAMM Popular | 7210223 | 🇲🇽 MX | Accessory HornFreeway Blaster | View on Amazon |
| FIAMM | 7211223 | 🇲🇽 MX | Accessory Horn (Louder)FWY Blaster | View on Amazon |
| FIAMM | 7410024 | 🇲🇽 MX | Accessory HornEl Grande | View on Amazon |
| FIAMM | 6602023 | 🇲🇽 MX | Accessory HornRed | View on Amazon |
| FIAMM | 6602523 | 🇲🇽 MX | Accessory HornChrome | View on Amazon |
| FIAMM | 6604523 | 🇲🇽 MX | Ultimate Blast HornAccessory Horn | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FIAMM Popular | 7201223 | 🇲🇽 MX | OE Replacement Tone2 Terminal Connection (Cut off and reuse OE Connector) | View on Amazon |
| FIAMM Popular | 7200223 | 🇲🇽 MX | OE Replacement Tone2 Terminal Blade Connection (Cut off and reuse OE Connector) | View on Amazon |
| FIAMM | 7421122 | 🇲🇽 MX | OE Replacement Horn KitIncludes OE Connectors & L Bracket | View on Amazon |
| FIAMM | 7421322 | 🇲🇽 MX | OE Replacement Horn KitIncludes OE Connectors | View on Amazon |
| FIAMM | 7250622 | 🇲🇽 MX | OE Replacement Horn KitIncludes OE Connectors & L Bracket | View on Amazon |
| FIAMM | 7250522 | 🇲🇽 MX | OE Replacement Horn KitIncludes OE Connectors & L Bracket | View on Amazon |
This table covers the horns mounted in the front of the vehicle.
12 Horn parts for the 2018 BMW 520I come from FIAMM. The "Popular" part is FIAMM 7210223.
The Accessory Replacement section lists 6 options from FIAMM — grouped under the catalog's "Accessory Replacement" designation — the notes column spells out what sets them apart. FIAMM 7210223 is listed in this group.
In the Standard Replacement grade, FIAMM supplies 6 parts: built to original-equipment specification. A representative part number is FIAMM 7201223.
Lighting Control Module (LCM)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MARELLI | LRE568 | 🇲🇽 MX | LED | View on Amazon |
| MARELLI | LRE570 | 🇲🇽 MX | LED | View on Amazon |
This table covers the modules that control the exterior lighting.
MARELLI supplies both parts for the 2018 BMW 520I.
Part numbers include MARELLI LRE568 and MARELLI LRE570.
Parking Aid Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MARELLI | SDP107 | 🇲🇽 MX | Rear | View on Amazon |
| MARELLI | SDP125 | 🇲🇽 MX | Fits Right | View on Amazon |
This table covers the ultrasonic park-aid sensors in the bumper. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors.
MARELLI supplies both parts for the 2018 BMW 520I.
Part numbers include MARELLI SDP107 and MARELLI SDP125.
Rain Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HELLA | 011808701 | 🇲🇽 MX | Exc. SA Code 610A3-Pin Connector | View on Amazon |
This table covers the Rain sensors. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors.
One part is listed for the 2018 BMW 520I — HELLA 011808701.
Starter Motor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALEO | 438514 | 🇲🇽 MX | 2.2 Kilowatt | View on Amazon |
This table covers the starter motors that crank the engine. Typical signs include no motion, a squeal, or a motor that only runs on one speed. Confirm power, ground and the control module before replacing the motor.
One part is listed for the 2018 BMW 520I — VALEO 438514.
Buying Electrical Parts for a 2018 BMW 520I
On this vehicle, the electrical system covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors.
- Confirm you have the 2.0L L4 Turbocharged engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, clean or renew the battery terminals and grounds with any charging-system repair.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Horn and Lighting Control Module (LCM) .
Frequently Asked Questions
How many electrical parts fit the 2018 BMW 520I?
Our catalog currently lists 18 electrical parts for the 2018 BMW 520I across 5 subcategories and 4 brands, covering the 2.0L L4 Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of electrical problems on a 2018 BMW 520I?
Common symptoms include slow cranking on cold mornings, a battery light that flickers, dim lights at idle, or a check-engine code pointing at a sensor circuit. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, clean or renew the battery terminals and grounds with any charging-system repair.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2018 BMW 520I was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2018 BMW 520I?
Every part on this page is matched to the 2.0L L4 Turbocharged engine. Then test before replacing — a failed alternator and a bad ground can look identical, and sensors are frequently condemned for wiring faults. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2018 BMW 520I
Electrical Parts for Other BMW 520I Years
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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.