Fiat 1100, 103 (EU)

Differential fluid capacity & service interval

Fiat 1100, 103 (EU) differential fluid capacity ranges from 0,61 to 0,65 liters. Service intervals include checks at 2500, 5000, and 10000 km, and changes at 20000 and 30000 km. The data covers 6 configurations.

The configuration chart below lists fill volumes and service intervals for each engine and trim variant.

TypeSpecifications
  • 1100H, 103S (1967-1969)
  • Rear
  • Use: Normal
  • Capacity 0,65 liter
  • Check 10000 km
  • Change 30000 km
  • 1100R, 103P (1966-1969)
  • Rear
  • Use: Normal
  • Capacity 0,65 liter
  • Check 10000 km
  • Change 30000 km
  • 1100D, 103G.1 (1962-1966)
  • Rear
  • Use: Normal
  • Capacity 0,65 liter
  • Check 2500 km
  • Change 30000 km
  • 1100, 103D (1957-1962)
  • Rear
  • Use: Normal
  • Capacity 0,64 liter
  • Check 5000 km
  • Change 20000 km
  • 1100, 103G/H (1957-1962)
  • Rear
  • Use: Normal
  • Capacity 0,61 liter
  • Check 5000 km
  • Change 20000 km
  • 1100, 103E (1953-1957)
  • Rear
  • Use: Normal
  • Capacity 0,64 liter
  • Check 5000 km
  • Change 20000 km

Additional Notes

  • Across the Fiat 1100, 103 series, rear differential fluid capacities fall within a narrow range of 0.61 to 0.65 liters, reflecting the compact unit design common to small European sedans of the era.
  • The 103G/H variant (1957-1962) carries the lowest rear differential capacity in the lineup at 0.61 liters, a slight reduction compared to the 0.64-liter figure shared by the 103D and 103E variants of the same period.
  • The 103E (1953-1957) and 103D (1957-1962) share identical rear differential specifications: a 0.64-liter capacity, a 5,000 km check interval, and a 20,000 km change interval under normal use conditions.
  • Beginning with the 1100D, 103G.1 (1962-1966), the change interval extended from 20,000 km to 30,000 km, while the capacity increased marginally to 0.65 liters.
  • The 1100D, 103G.1 specifies the most frequent check interval in the series at 2,500 km under normal use conditions, half the 5,000 km interval of the earlier 103D and 103E variants.
  • The 1100H, 103S (1967-1969) and the 1100R, 103P (1966-1969) share identical rear differential specifications: a 0.65-liter capacity, a 10,000 km check interval, and a 30,000 km change interval under normal use conditions.
  • The shift to a 10,000 km check interval in the 103S and 103P variants represents the longest check interval across all six configurations, pairing with the extended 30,000 km change interval introduced in the 103G.1 generation.

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