The 2018 UAZ Pickup with the 2.7L I4 is a Russian-built workhorse notorious for transmission problems and cooling system weaknesses. Built for simplicity and off-road abuse, but parts quality and assembly tolerances are inconsistent even when new.
Transmission Shift Solenoid and Overdrive Failures
Common · high severityTypical onset: 40,000-80,000 mi
Symptoms: Hard shifting or refusal to shift into overdrive, Transmission stuck in lower gears or limp mode, Check engine light with P0700-P0758 range codes, Erratic shifting behavior especially when cold
Fix: Replace shift solenoid pack and/or overdrive solenoid, flush transmission fluid. Often requires dropping the pan or valve body access. 3-5 hours labor depending on solenoid location and whether external filter needs replacement simultaneously.
Estimated cost: $600-1,400
Transmission Oil Cooler Line Leaks and Cooler Failure
Common · high severityTypical onset: 50,000-100,000 mi
Symptoms: Transmission fluid pooling under vehicle, Transmission overheating warnings or burnt smell, Low transmission fluid levels on dipstick, Cooler lines corroding at fittings or cracking at bends
Fix: Replace transmission oil cooler and/or hardlines. Often both cooler and lines fail together due to corrosion. If caught early just lines, but if fluid contaminated radiator coolant, needs full flush. 2-4 hours labor.
Estimated cost: $400-1,200
Transmission Mounts Collapsing
Common · medium severityTypical onset: 30,000-70,000 mi
Symptoms: Excessive drivetrain clunk on acceleration or deceleration, Vibration through shifter and floor at idle, Visible sagging or cracking of rubber mount, Difficulty engaging gears smoothly
Fix: Replace transmission mount(s). UAZ uses soft rubber that degrades quickly under load. Often both front and rear mounts need replacement at same time. 1.5-2.5 hours labor.
Estimated cost: $250-550
Serpentine Belt Tensioner and Idler Pulley Bearing Failures
Common · medium severityTypical onset: 45,000-90,000 mi
Symptoms: Squealing or chirping from front of engine especially when cold or wet, Visible wobble in idler pulley or tensioner arm, Belt tracking off-center or showing uneven wear, Sudden belt failure leaving vehicle stranded
Fix: Replace tensioner assembly and idler pulley as a set, install new belt. Bearings in both components are poor quality and fail prematurely. 1-2 hours labor.
Estimated cost: $200-450
Intake Manifold Gasket Leaks and Cracking
Occasional · medium severityTypical onset: 60,000-120,000 mi
Symptoms: Rough idle and stumbling acceleration, Vacuum leak codes P0171/P0174 (lean condition), Visible coolant weeping from manifold base, Coolant smell in cabin or loss without external puddles
Fix: Remove intake manifold, replace gaskets and inspect manifold for cracks. Some 2.7L manifolds develop hairline cracks from heat cycling. If cracked, requires manifold replacement. 4-6 hours labor.
Estimated cost: $600-1,400
Fuel Filter Clogging from Tank Contamination
Occasional · medium severitySymptoms: Hard starting especially after sitting overnight, Loss of power under load or at highway speeds, Engine stumbling or cutting out intermittently, Fuel pump working harder than normal (audible whine)
Fix: Replace fuel filter and inspect tank for rust or debris. UAZ fuel tanks are prone to internal corrosion, sending particles to filter. If tank contaminated, requires drop and clean or replacement. Filter alone 0.5-1 hour; tank service adds 3-4 hours.
Estimated cost: $100-250 filter only, $800-1,500 with tank work
Input Speed Sensor Failures Causing Speedometer and Shift Issues
Occasional · low severityTypical onset: 50,000-100,000 mi
Symptoms: Speedometer jumping erratically or dead, Transmission shifting poorly or staying in lower gears, ABS and traction control lights illuminated, Check engine light with speed sensor codes P0715-P0720
Fix: Replace transmission input speed sensor. Located on transmission housing, relatively easy access. Clean connector contacts and check wiring first as connectors corrode easily. 0.5-1.5 hours labor.
Estimated cost: $150-400
Catastrophic Piston Failure from Overheating or Oil Starvation
Rare · high severityTypical onset: 80,000-150,000 mi
Symptoms: Severe knocking or rattling from engine block, Complete loss of compression in one or more cylinders, Metal fragments in oil or coolant, Sudden engine seizure or refusal to start
Fix: Engine removal and rebuild or replacement required. Pistons fail from combination of weak ring design and inadequate cooling. If caught early might save block with piston replacement; most need full shortblock or used engine swap. 20-30 hours labor for R&R and rebuild.
Estimated cost: $4,500-8,500
Only buy if you need serious off-road capability on a budget and can wrench yourself — transmission problems will eat you alive at shop rates.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.