Suzuki Jimny JB74

The K15B is a water-cooled naturally aspirated inline-four with DOHC sixteen valves and intake VVT. Displacement is 1,460 cc, although Suzuki's history page calls it a 1,500 cc engine, with a 74.0 mm bore, 84.9 mm stroke and 10.0:1 compression. Suzuki's launch sheet rates it at 75 kW (102 PS) at 6,000 rpm and 130 N·m (13.3 kgf·m) at 4,000 rpm, net.

Suzuki Japan's current publication gives 74 kW (101 PS) at 6,000 rpm with the same torque. We do not know the changeover date or reason. The current engine description names 0W-16 oil; use the individual car's manual for its service specification.

Suzuki's launch release says the new ladder frame, front-engine rear-drive layout, part-time 4WD with reduction transfer and three-link rigid axles carry over to both the Jimny and the Sierra. The launch sheet lists coil springs on rigid axles front and rear, front discs, rear leading-trailing drums, and ABS with EBD. The manual uses 4.425 / 2.304 / 1.674 / 1.190 / 1.000, reverse 5.151, final drive 4.090, with a transfer of 1.000 high and 2.002 low. The automatic uses 2.875 / 1.568 / 1.000 / 0.696, reverse 2.300, final drive 4.300, with 1.320 high and 2.643 low. The transfer is chain-and-gear.

Suzuki lists 3,550 × 1,645 × 1,730 mm (length, width, height, roof antenna folded), a 2,250 mm wheelbase, tracks of 1,395 mm front and 1,405 mm rear, 210 mm minimum ground clearance and a 4.9 m turning radius. Tyres are 195/80R15 96S and the tank holds 40 litres. Launch weights were 1,070 kg (5MT) and 1,090 kg (4AT); the current standard weights are 1,100 kg and 1,110 kg. Do not apply the current figures to a 2018 car or a blanket "under 1,100 kg" claim to every Sierra.

Suzuki's WLTC combined figures are laboratory certification values. The launch sheet gives 15.0 km/L for the manual and 13.6 km/L for the automatic. The release for the revision on sale from 4 November 2025 gives 15.4 km/L and 14.2 km/L.

Japanese grades are JL and JC. Do not replace them with export grade names. At launch Safety Support was standard on the JC and a manufacturer option on the JL.

The 15 October 2025 announcement (on sale 4 November 2025) adopted Dual Sensor Brake Support II and made lane-departure suppression standard; all-speed adaptive cruise following applies to automatics. Suzuki's current interior page says full automatic air conditioning is fitted to all vehicles. A nine-inch display audio with rear camera and Suzuki Connect unit is a manufacturer option on the JL and JC, and Suzuki Connect services need a subscription.

Recall 4946 (14 May 2021) covers 30,679 JB74W cars, JB74W-100036 to 130721, built 1 June 2018 to 3 December 2020: repeated door opening can break the front-door harness wires, so both harnesses are replaced. Recall 5438 (26 January 2024) covers 8,510 JB74W cars, JB74W-102720 to 111240, built 10 November 2018 to 21 August 2019: the low-pressure fuel pump's resin impeller can swell and, at worst, stall the engine, so the pump is replaced. Suzuki warns that a chassis range can include unaffected cars, so check each chassis number.

Suzuki's Japanese chronology lists the Jimny Nomade as JC74, introduced in 2025; the five-door car is not a JB74. Suzuki's July 2018 release set a domestic sales target of 1,200 Sierras a year, excluding exports. That is a plan, not a count, and no JB74 production total was located. The earliest build date documented in the recalls we read is 1 June 2018, not proof that production began that day.

For the US, the age rule asks whether a car is at least 25 years old, counted from that car's own date of manufacture (49 CFR 591.5(i)); the model year or launch date does not decide it. EPA's rule for vehicles over 21 years old expects the engine to be the same model and configuration as the original, so check any replacement engine. State registration rules are separate. Canada counts 15 years from the month and year of manufacture. A JB74W built on 1 June 2018, the earliest documented build, reaches 25 years in June 2043 and Canada's 15-year mark in June 2033 (our arithmetic); check the individual car.