Sentrabuyer's guide

The B18 Sentra is a composed, well-priced compact sedan, but its CVT is the single biggest risk on the used market. Shudder or harsh engagement — often written off by sellers as normal behaviour — points to fluid neglect or internal wear that runs to four figures to fix. Oil consumption and coolant loss add to the picture on higher-mileage cars, and the generation's ADAS suite introduces calibration faults whenever glass is replaced without proper documentation.

This guide covers ten documented issues: CVT/automatic shudder or harsh shift, engine oil consumption or leak, coolant leak or overheating, infotainment/camera electrical faults, suspension knocks and tyre wear, brake corrosion or seized caliper, AC condenser/compressor fault, water leak or accident repair, ADAS/radar calibration fault, and recall/campaign status. Each fault has a field check and a real repair-cost range.

A clean B18 with documented CVT fluid history and a full-system scan is one of the better-value compact sedans available used. This guide gives you the checks to confirm that in under thirty minutes at a viewing.