Cold air, done properly
A regas only helps a healthy system — if the gas got out, something let it out. We diagnose first, repair what’s needed, and regas once, to your BMW’s exact specification.
When the climate control stops pulling its weight
Air conditioning fades so gradually that most owners only notice in the first heatwave. Weak airflow isn’t always a gas problem, either — a clogged cabin filter chokes the vents, and the musty smell so many BMWs develop lives on the evaporator, not in the refrigerant.
Whatever the symptom, the process is the same: test, find, fix — then regas.
R134a or R1234yf — we service both
BMWs split into two refrigerant eras: cars before around 2014 run R134a, everything from 2017 runs R1234yf, and the years between vary by model — the under-bonnet label is definitive, and checking it is part of every job. The two gases use deliberately incompatible connections and entirely separate machines, so a workshop needs both to serve the whole BMW parc. We run both.
Electric BMWs raise the stakes again: on an i4 or iX the compressor is a high-voltage component and the same refrigerant circuit helps cool the drive battery — so air-con work there is a job for high-voltage qualified technicians with the correct non-conductive compressor oil. That’s exactly how our EV-trained team is set up.
Test, find, fix — then regas
Vent temperatures, system pressures on the machine, and a visual check of condenser, pipework, compressor and the cabin filter’s condition.
UV dye traced under ultraviolet light, an electronic detector on joints and seals, and a nitrogen pressure test where a system has already lost its charge.
Condensers, pipes, compressors, seals and O-rings in genuine or OE quality — the parts that actually let the gas out.
Recovered, vacuumed, then recharged with the precise refrigerant type, weight and oil on your car’s label — and function-tested before handover.
How often should my BMW be regassed?+
There's no fixed BMW interval. Every system very slowly loses a little refrigerant through its hoses and seals over the years, so a check every two to three years keeps it cold and catches small problems early. But a system that needs gas every year or two isn't due a regas — it has a leak, and finding it costs less than feeding it.
It's losing gas — can't you just top it up?+
We could, but it wouldn't be doing you a favour — and where a system has a known leak, UK regulations don't allow a garage to refill it until the leak is repaired. New gas escapes the way the old gas did, and a low system also runs the compressor short of oil, turning a small repair into a big one. We find the leak, fix it, and regas once.
What fixes the musty smell on start-up?+
Almost always bacteria and mould on the evaporator — the cold, damp matrix behind the dashboard — often helped along by an old cabin filter. An antibacterial clean of the evaporator and vents plus a fresh filter clears it. It's a hygiene job, not a gas problem; a regas won't touch it.
Can you work on the air con in my i4 or iX?+
Yes. On electric BMWs the compressor is high-voltage and the same circuit helps cool the drive battery — so it needs qualified technicians, the right equipment and the correct non-conductive oil. Our EV-trained team handles it in-house.
Any point using air conditioning in winter?+
Plenty. It dehumidifies the cabin, so it clears misted windows far faster than heat alone — and regular running keeps oil moving, which keeps the compressor seals lubricated and sealed. Leave the climate control in auto and the car largely takes care of it.
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