What is OEM number 31400-66D02 and which part does it identify?

OEM number 31400-66D02 identifies the alternator for the Suzuki Grand Vitara I (FT, HT), built between 2001 and 2005. This alternator is designed for use with the 1.6 litre G16B petrol engine and forms part of a family of interchangeable Suzuki alternator numbers including 31400-66D00, 31400-79G00, and 31400-81A00. The unit is also cross-referenced under Denso part numbers, with Denso 102211-5230, 102211-5231, and 102211-5610 listed as equivalent Denso-manufactured units. Superseded number: 31400-66D00. Cross-reference: Denso 102211-5230 / 102211-5231 / 102211-5610. OEM number 31400-66D02 may fit additional vehicle models not listed here, always verify against the OEM number on your existing part.

Does OEM number 31400-66D02 fit my vehicle?

OEM number 31400-66D02 fits the Suzuki Grand Vitara I (FT, HT), built between 2001 and 2005, fitted with the 1.6 litre G16B petrol engine producing 69 kW (94 hp). This generation was sold as a four-wheel drive estate, marketed under the designation SQ416, and the alternator fitted is a 12 V unit generally rated at 60 A.

The critical constraint governing fitment is the engine code, since the alternator mounting, pulley, and output rating are matched to the G16-family engine rather than to the body style alone. The same 31400-66D family alternator is also used on the Suzuki Escudo G16A (2001-2002), Grand Escudo 1.6L (1998-2008), Jimny 1.3L 16V (1998-2010), Vitara L4 1.6L (1999-2002), and Grand Vitara I 1600 (2001-2004), reflecting shared use of the G16-series engine architecture across these Suzuki models rather than a body-specific fitment. Buyers should confirm the engine code stamped on their vehicle before ordering, since visually similar Grand Vitara I examples fitted with the 2.5 litre V6 engine use a different alternator (31400-77E11 or 31400-77E12).

The RAREELECTRICAL cross-reference for this alternator family also lists the Suzuki Alto (2002-2005) and Chevrolet Tracker (1999-2000) as compatible applications. Cross-reference data also associates OEM number 31400-66D02 with the Suzuki Alto, but the Alto's smaller engine displacement and lower typical electrical load differ from the G16-series application, verify the printed number on your existing part before ordering.

OEM number 31400-66D02 may fit additional vehicle models not listed here. Always verify by checking the OEM number printed on your existing part.

Fits: Suzuki Grand Vitara I (FT, HT) 1.6 4x4 (SQ416), G16B engine, 2001-2005; also fitted to Suzuki Vitara 1.6 (1999-2002), Jimny 1.3 16V (1998-2010), Escudo 1.6 (2001-2002), and Grand Escudo 1.6 (1998-2008) sharing the G16-series engine platform
Does not fit: Suzuki Grand Vitara I fitted with the 2.5 litre V6 engine (uses 31400-77E11 / 31400-77E12)

When should OEM number 31400-66D02 be replaced?

Replacement triggers

• Dashboard battery warning light illuminated while the engine is running.
• Dimming or flickering headlights and interior lighting, particularly at idle.
• Battery repeatedly discharging or requiring frequent jump-starts.
• Whining, grinding, or squealing noise from the alternator area.
• Burning smell from the engine bay, indicating overheating windings or a failing bearing.
• Slow or erratic operation of electrical accessories such as power windows or the radio.
• Difficulty starting the vehicle despite a known-good battery.

We used AI to help write this text. We regularly check the information - but cannot guarantee that all data is accurate.