G22 · G23 · G26 · 2020–present (incl. LCI)
BMW 4 Series G22/G23/G26 A/C compressor failure — M440i, 430i and more
Your BMW 4 Series (G22/G23/G26) left the factory with a clutchless A/C compressor (part 64529482996) — a known weak point with a four-figure replacement cost. ACBridge lets the car run the proven magnetic-clutch compressor instead. One connector. No coding. Reversible.
Covered variants
From the factory parts catalog for G22/G23/G26. Your exact build can vary by production date and market — when in doubt, send us your VIN and we confirm before you order.
| Trim | Engine | ACBridge status |
|---|---|---|
| M440i / M440iX | B58 3.0L 6-cyl petrol | Supported — SKU ready |
| 430i / 430iX / 420i / 420iX | B48 2.0L 4-cyl petrol (B46 on some markets) | Supported — SKU ready |
| Alpina B4 Gran Coupé | S58 3.0L M twin-turbo | Supported — SKU ready |
| 420d / 420dX | B47 2.0L 4-cyl diesel | Supported — SKU ready |
The 10-minute install
STEP 1
Unplug the factory compressor connector.
STEP 2
Plug ACBridge inline — both ends click into the stock plugs.
STEP 3
Bolt the ground lug to the strut-tower stud. Done.
Common questions
Why does the BMW 4 Series (G22/G23/G26) A/C compressor fail?
These cars use a clutchless, externally-controlled variable compressor that spins whenever the engine runs — it can never fully disengage. When its internals wear or seize, the only official repair is a new unit of the same design at a four-figure list price.
What does ACBridge actually do?
ACBridge is a small potted adapter that installs inline at the factory compressor connector. It lets your car correctly drive the proven magnetic-clutch compressor (BMW donor family 64 52 6 994 082) that BMW fitted to the same model lines as a factory build variant — using your car's own A/C controls.
Does it need coding or throw fault codes?
No. The install is plug-in at one connector plus a ground lug — about 10 minutes. No coding session, no fault codes, and it is fully reversible: unplug it and the car is electrically stock.
Which 4 Series (G22/G23/G26) variants does it fit?
All variants in the table above — petrol and diesel, 4- and 6-cylinder — are confirmed against the factory parts catalog: they all use the same clutchless compressor and connector, and one ACBridge covers them. Unusual build or not sure? Send us your VIN and we confirm before you order.