The 2021 BMW X1 has 39 electrical parts with verified fitment on this page — 7 part types and 16 brands, covering both the 1.5L L3 Turbocharged and the 2.0L L4 Turbocharged. Each part includes a manufacturer part number and application notes.
The electrical system on the 2021 BMW X1 covers charging, starting and the sensors and modules the vehicle relies on, from alternator and starter to oxygen sensors. The largest groups are Battery (17 parts), Parking Aid Sensor (10 parts) and Alternator / Generator (5 parts). The other 4 part types cover the remaining 7 parts.
The 2021 BMW X1 was sold with both the 1.5L L3 Turbocharged and the 2.0L L4 Turbocharged. 9 parts fit every engine; the other 30 are engine-specific. Each part shows which engine(s) it fits.
16 brands supply electrical parts for the 2021 BMW X1, led by MARELLI (6 parts), WAI GLOBAL (4 parts) and FVP (4 parts), plus 13 more brands. Quality grades include AGM, New and Remanufactured.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2021 BMW X1. 6 parts have it, including DEKA 9A48 (Battery) and DORMAN 684134 (Parking Aid Sensor). Each part number opens a page with every vehicle that part fits.
Alternator / Generator
New
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAI GLOBAL Fits: 2.0L L4 Turbocharged | 21637N | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 120 Amps | View on Amazon |
| WAI GLOBAL Fits: 2.0L L4 Turbocharged | 21817N | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 150 Amps | View on Amazon |
| WAI GLOBAL Fits: 2.0L L4 Turbocharged | 22174N | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 180 Amps | View on Amazon |
Remanufactured
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Fits: 2.0L L4 Turbocharged | 11848 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Remanufactured | View on Amazon |
| PURE ENERGY Fits: 2.0L L4 Turbocharged | 11848 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Remanufactured | View on Amazon |
This table covers the alternators that charge the battery and run the electrical load. Typical signs include dim lights at idle, a battery lamp, or a growl from the charging pulley. Load-test the battery and inspect the belt and grounds — a bad ground mimics a failed alternator.
5 Alternator / Generator parts for the 2021 BMW X1 come from 3 brands — WAI GLOBAL, FVP and PURE ENERGY.
The New section lists 3 options from WAI GLOBAL — brand-new units rather than rebuilt ones. WAI GLOBAL 21637N is listed in this group.
The Remanufactured section lists 2 options from FVP and PURE ENERGY — factory-rebuilt units with new wear components. FVP 11848 is listed in this group.
This group includes WAI GLOBAL 21637N, WAI GLOBAL 21817N and WAI GLOBAL 22174N and the remaining parts above.
Battery
AGM (Extended Life)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DEKA Popular Fits: 2.0L L4 Turbocharged | 9A48 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IntimidatorAGM | View on Amazon |
| DEKA Popular Fits: 2.0L L4 Turbocharged | 9A94R | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | IntimidatorAGM | View on Amazon |
| FVP Popular Fits: 2.0L L4 Turbocharged | P94RAGM | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Platinum AGMBCI Group: 94R | View on Amazon |
| LUCAS Popular Fits: 2.0L L4 Turbocharged | LBAGM004A | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | BCI Group: 48AGM | View on Amazon |
| ACDELCO Fits: 2.0L L4 Turbocharged | 48AGM | 🇺🇸 US 🇨🇦 CA | AGMBCI Group: 48 | View on Amazon |
| ACDELCO Fits: 2.0L L4 Turbocharged | 94RAGMHR | 🇺🇸 US 🇨🇦 CA | High ReserveAGM | View on Amazon |
| ACDELCO Fits: 2.0L L4 Turbocharged | 94RAGM | 🇺🇸 US 🇨🇦 CA | AGMBCI Group: 94R | View on Amazon |
| BOSCH Fits: 2.0L L4 Turbocharged | S6587B | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | AGMAGM | View on Amazon |
| EXIDE Fits: 2.0L L4 Turbocharged | MXH6L348 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Marathon MaxBCI Group 48 (H6) | View on Amazon |
| EXIDE Fits: 2.0L L4 Turbocharged | MXH7L494R | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Marathon MaxBCI Group 94R (H7) | View on Amazon |
| FVP Fits: 2.0L L4 Turbocharged | P48AGM | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Platinum AGMBCI Group: 48 | View on Amazon |
| LUCAS Fits: 2.0L L4 Turbocharged | LBAGM006A | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | BCI Group: 49AGM | View on Amazon |
| P1MAX Fits: 2.0L L4 Turbocharged | PMAGMH648 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | BCI Group 48 AGM760 CCA | View on Amazon |
| P1MAX Fits: 2.0L L4 Turbocharged | PMAGMH794R | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | BCI Group 94R AGM800 CCA | View on Amazon |
Performance AGM (Extended Life + Increased Power)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FULLRIVER Fits: 2.0L L4 Turbocharged | FT68048 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | BCI Group 48(Length X Width X Height) 10.94 In x 6.89 In x 7.48 In | View on Amazon |
| FULLRIVER Fits: 2.0L L4 Turbocharged | FT85094R | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | BCI Group 94R(Length X Width X Height) 12.36 In x 6.85 In x 7.48 In | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DEKA Fits: 1.5L L3 Turbocharged | 9A48 | 🇲🇽 MX | IntimidatorAGM | View on Amazon |
This table covers the batteries listed by group size and specification. Typical signs include slow cranking, a battery lamp, or a no-start after the vehicle sat overnight. Confirm group size and terminal layout in the notes. Clean the posts and the ground before condemning the battery.
17 Battery parts are listed for the 2021 BMW X1, from DEKA, ACDELCO, FVP and 5 other brands. DEKA 9A48 carries the "Popular" badge.
The AGM (Extended Life) section lists 14 options from ACDELCO, DEKA, FVP and 4 other brands — grouped under the catalog's "AGM (Extended Life)" designation — the notes column spells out what sets them apart. DEKA 9A48 is listed in this group.
The Performance AGM (Extended Life + Increased Power) section lists 2 options from FULLRIVER — grouped under the catalog's "Performance AGM (Extended Life + Increased Power)" designation — the notes column spells out what sets them apart. FULLRIVER FT68048 is listed in this group.
1 ungrouped part is not assigned to a grade, with the same engine-level match.
Battery Current Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: all 2021 X1 engines | BSC85 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Intelligent Battery Sensor | View on Amazon |
This table covers the Battery Current 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.
This group shows a single part: STANDARD MOTOR PRODUCTS BSC85.
Lighting Control Module (LCM)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MARELLI Fits: all 2021 X1 engines | LRE703 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | LED | View on Amazon |
| VEMO Fits: 2.0L L4 Turbocharged | V20730295 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the modules that control the exterior lighting.
2 Lighting Control Module (LCM) parts for the 2021 BMW X1 come from 2 brands — MARELLI and VEMO. 1 part fits every engine; the other 1 is engine-specific.
This group includes MARELLI LRE703 and VEMO V20730295.
Parking Aid Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Popular Fits: all 2021 X1 engines | 684134 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Black | View on Amazon |
| TECHPRO Popular Fits: all 2021 X1 engines | BM1075101 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Customer Paints to Match | View on Amazon |
| HELLA Fits: 2.0L L4 Turbocharged | 358141811 | 🇺🇸 US 🇨🇦 CA | 3-Pin ConnectorPlugged | View on Amazon |
| HELLA Fits: 2.0L L4 Turbocharged | 358141821 | 🇺🇸 US 🇨🇦 CA | Angled3-Pin Connector | View on Amazon |
| HELLA Fits: 2.0L L4 Turbocharged | 358141781 | 🇺🇸 US 🇨🇦 CA | 3-Pin ConnectorPlugged | View on Amazon |
| MARELLI Fits: all 2021 X1 engines | SDP056 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Front | View on Amazon |
| MARELLI Fits: all 2021 X1 engines | SDP101 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits Right | View on Amazon |
| MARELLI Fits: all 2021 X1 engines | SDP107 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits RearFrom 09/2015 | View on Amazon |
| MARELLI Fits: all 2021 X1 engines | SDP108 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Fits Right | View on Amazon |
| MARELLI Fits: 1.5L L3 Turbocharged | SDP131 | 🇲🇽 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.
10 Parking Aid Sensor parts for the 2021 BMW X1 come from 4 brands — MARELLI, HELLA, DORMAN and 1 other brand. The "Popular" part is DORMAN 684134. 6 parts fit every engine; the other 4 are engine-specific.
Parking Aid Sensor Bracket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TECHPRO Fits: all 2021 X1 engines | BM1174100 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | RearF48 | View on Amazon |
This table covers the brackets that mount the Parking Aid Sensor. Typical signs include a cracked mount, a rattle, or a bracket that no longer holds alignment. Confirm position in the notes. Many brackets look alike and bolt to different corners.
This group shows a single part: TECHPRO BM1174100.
Starter Motor
New
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WAI GLOBAL Fits: 2.0L L4 Turbocharged | 31090N | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
Remanufactured
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Fits: 2.0L L4 Turbocharged | 12845 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Remanufactured | View on Amazon |
| PURE ENERGY Fits: 2.0L L4 Turbocharged | 12845 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Remanufactured | 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.
3 Starter Motor parts for the 2021 BMW X1 come from 3 brands — WAI GLOBAL, FVP and PURE ENERGY.
The New section: 1 option from WAI GLOBAL. WAI GLOBAL 31090N is listed in this group.
The Remanufactured section: 2 options from FVP and PURE ENERGY. FVP 12845 is listed in this group.
Listed part numbers: WAI GLOBAL 31090N and FVP 12845, plus the other parts above.
Buying Electrical Parts for a 2021 BMW X1
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.
- Match the engine first. Some electrical parts fit every engine; others are engine-specific. Each row shows which engine(s) it fits.
- 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: Battery and Parking Aid Sensor .
Frequently Asked Questions
How many electrical parts fit the 2021 BMW X1?
Our catalog currently lists 39 electrical parts for the 2021 BMW X1 across 7 subcategories and 16 brands, covering both the 1.5L L3 Turbocharged and the 2.0L L4 Turbocharged. Each part is matched to the engine(s) it fits.
Do electrical parts differ between 2021 BMW X1 engines?
Some do. 9 parts fit every engine; the other 30 are engine-specific. Each row (and the filter at the top) shows which. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of electrical problems on a 2021 BMW X1?
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 2021 BMW X1 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 2021 BMW X1?
First match the engine — each row shows which engine(s) the part fits. 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 2021 BMW X1
Electrical Parts for Other BMW X1 Years
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