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.

1989 BMW 635CSi AutomaticFACTORY OEM SERVICE PROCEDURE

Engine Performance: Specifications: Capacities

BATTERY SPECIFICATIONS

Application	Amp Hr. Rating
325i, 325iC, 325iS & 525i	65
535i	85
635CSi	65
735i	84

FLUID CAPACITIES

Application

Quantity

Crankcase (Includes Filter)

325i, 325iC, 325iS & 525i

5.0 qts. (4.8L)

All Others

6.1 qts. (5.8L)

Cooling System

325i, 325iC, 325iS & 525i

11.0 qts. (10.5L)

All Others

12.7 qts. (12.0L)

Manual Transmission ⁽¹⁾

All Models

1.3 qts. (1.2L)

Automatic Transmission (Dexron II)

All Models

3.2 qts. (3.0L)

Rear Axle ⁽²⁾

325i, 325iC, 325iS & 525i

1.8 qts. (1.7L)

All Others

2.0 qts. (1.9L)

⁽¹⁾	Use non-hypoid SAE 80 gear oil with API-GL4 rating or a single grade heavy duty engine oil (mineral oil based) SAE 20/30/40 with API-SE or SF rating.

⁽²⁾	Use hypoid gear oil SAE 90 with API-GL5 rating.

Factory Service Tools

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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.

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