Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBMW2011128I CONVERTIBLE (E88) L6-3.0L (N51)REPAIR AND DIAGNOSISSPECIFICATIONSFLUID TYPE SPECIFICATIONSREFRIGERANT OIL
2011 BMW 128i Convertible (E88) L6-3.0L (N51)
Refrigerant Oil
2011 BMW 128i Convertible (E88) L6-3.0L (N51)SECTION Refrigerant Oil
Refrigerant oil type Polyalkylene Gycol (PAG)
NOTE:
Oil Used in R-134a-Charged Systems
A synthetic oil is used, which is totally different than the mineral based oils used in Freon-R12 Systems.
R-134a Systems require Polyalkylene Glycol lubricants, often referred to as "PAG" oil. Use of R-12 compressor oil in R134a Systems will cause the compressor to seize and fail. The R-12 mineral oil does not stay in solution in R-134a. In addition, R-134a compressor should not be used in an R-12 System. Long term damage and corrosion will result.
The GREEN R-134a system labels, usually located near the top side of the fan shroud in the engine compartment, will display the refrigerant requirement for R-134a Systems.
R-12 Systems will have a BLACK label in a similar location.
NOTE:
Oil Used in R-134a-Charged Systems
A synthetic oil is used, which is totally different than the mineral based oils used in Freon-R12 Systems.
R-134a Systems require Polyalkylene Glycol lubricants, often referred to as "PAG" oil. Use of R-12 compressor oil in R134a Systems will cause the compressor to seize and fail. The R-12 mineral oil does not stay in solution in R-134a. In addition, R-134a compressor should not be used in an R-12 System. Long term damage and corrosion will result.
The GREEN R-134a system labels, usually located near the top side of the fan shroud in the engine compartment, will display the refrigerant requirement for R-134a Systems.
R-12 Systems will have a BLACK label in a similar location.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.