BMW 320i Headlight Bulb Size

The BMW 320i high beam headlight uses bulb sizes H7, D1S, and H5001, while the low beam headlight requires H7, D1S, and H5006 bulb sizes across various model generations. The replacement chart covers vehicle production years from 1977 to 2018 with corresponding bulb size specifications.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

High Beam Headlight

Years	Bulb Size
2016-2018	H7 (With Halogen Capsule Headlamps)
2013-2015	D1S (With HID Headlamps)
2013-2015	H7 (With Halogen Capsule Headlamps)
1977-1983	H5001

Low Beam Headlight

Years	Bulb Size
2017-2018	H7 (With Halogen Capsule Headlamps)
2013-2016	D1S (With HID Headlamps)
2013-2016	H7 (With Halogen Capsule Headlamps)
1977-1983	H5006

Bulb Specifications

Description	Bulb Size
ECE standard (Europe & worldwide). Single-filament halogen bulb with PX26d base. Also approved in the US and Japan. 12V, 55W.	H7
ECE standard (Europe & worldwide). HID (xenon) discharge bulb with PK32d-2 base and integral ignitor, for projector-type housings. 85V, 35W.	D1S
ANSI standard (US & Canada). 4-inch square sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H5001
ANSI standard (US & Canada). 5.75-inch round sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H5006

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Additional Notes

The H7 bulb is the most frequently specified type across the BMW 320i headlight data, covering both high beam and low beam positions for the 2016-2018 model years with halogen capsule headlamps, as well as serving both functions in the 2013-2015 range where halogen capsule headlamps were fitted. It is a single-filament halogen bulb rated at 12V and 55W, built to ECE standards for use in Europe and worldwide, with a PX26d base, and it also holds approval in the United States and Japan.
The D1S is the specified bulb for HID headlamp configurations on the BMW 320i across the 2013-2015 high beam positions and the 2013-2016 low beam positions. Unlike halogen types, it is a high-intensity discharge xenon bulb operating at 85V and 35W, fitted with a PK32d-2 base and an integral ignitor, and it is designed specifically for projector-type housings.
The 2013-2015 high beam positions and the 2013-2016 low beam positions each carry two separate bulb size entries per year, one for halogen capsule headlamps and one for HID headlamps. This reflects a factory headlamp system option rather than a single universal fitment, meaning the correct bulb depends on which headlamp system the vehicle was built with.
The H5001, specified for high beam positions on the BMW 320i from 1977-1983, is an ANSI-standard 4-inch square sealed beam unit operating at 12V. It is not a replaceable bulb in the conventional sense; the entire sealed unit is replaced as one assembly.
The H5006, specified for low beam positions on the 1977-1983 model years, is an ANSI-standard 5.75-inch round sealed beam unit, also rated at 12V and replaced as a complete assembly rather than as an individual bulb.
The H5001 and H5006 sealed beam types follow ANSI standards applicable to the United States and Canada, while the H7 and D1S types follow ECE standards. These two regulatory frameworks are not interchangeable, and the sealed beam units used in the earlier model years are structurally and electrically distinct from the capsule-style bulbs used in later configurations.
The high beam and low beam positions on the 1977-1983 model years use different sealed beam types from each other, with the H5001 assigned to high beam and the H5006 to low beam. The two units differ in physical form, making them non-interchangeable between positions.
For the 2016 model year, the high beam position lists only the H7 for halogen capsule headlamps, while the low beam position lists both the H7 and the D1S, indicating that HID low beam fitment extended into 2016 without a corresponding HID high beam entry for that year.