2020 Volkswagen Tiguan engine problems

Crankcase breather valve stuck closed, causing excessive crankcase pressure buildup (documented at over 0.5 psi) and catastrophic engine damage. Owner spent $3,787.59 on prior repairs addressing oil-related issues before engine was condemned and required full replacement.

When: Failure occurred mid-operation while carrying family; owner reported warning lights and excessive oil pressure symptoms appearing intermittently prior to catastrophic failure

Symptoms owners cite: Oil-related warning lights intermittent; Symptoms of excessive oil pressure; Dashboard warning: '12V battery not charging. Stop engine.' displayed at failure; Sudden loss of engine function

Repairs/costs cited: $3,787.59 spent on prior repairs at VW Southtown for oil-related issues caused by stuck PCV valve; full engine replacement required per authorized VW service diagnosis

Recalls/TSBs owners mention: Problem confirmed and documented by authorized VW service department with detailed repair orders and technical diagnosis; owner reports research indicates this is a known, widespread issue affecting 2020–2021 Tiguans

Multiple owners report the 2020 Tiguan burns or consumes oil at rates significantly above normal. Consumption rates vary from approximately 1 quart per 1,000–1,200 miles to 1–2 quarts every 2–3 months. Multiple owners report oil warning lights and requirement to add oil frequently despite performing oil changes on manufacturer schedule. Several cases involved oil consumption tests completed at dealerships that owners say returned results claiming the consumption was 'within normal limits,' yet owners found the rate unacceptable.

When: Failures begin early in vehicle ownership: oil warning lights reported as early as 2,600–5,800 miles on new vehicles; consumption issues noted before 50,000-mile warranty expiration; continuing through 68,000 miles and beyond

Symptoms owners cite: Oil warning light illuminated; Oil level dropping rapidly between services; Blue or white smoke from exhaust; Requirement to add oil frequently despite recent oil changes; Check engine or emissions warning lights

Repairs/costs cited: Multiple diagnostic and repair attempts performed, including PCV-related repairs (all owner-paid); owners report dealerships refusing warranty coverage or further action, claiming consumption is 'within range'; some owners sought independent mechanic evaluation

Recalls/TSBs owners mention: VW and dealerships have told owners this consumption level is 'within range' and have required additional paid testing; no recalls or TSB programs for oil consumption mentioned in narratives; owner of complaint #4 states issue was reported after 3rd or 4th oil change before 50,000-mile warranty expiration

Cylinder head valve seals failed, allowing oil to seep through exhaust ports and burn in the second head emissions system. One owner reports the exhaust port became clogged. Independent mechanic identified smoke from exhaust and determined top half of engine required replacement; cylinder head was on backorder.

When: Reported at approximately 55,000 miles

Symptoms owners cite: Engine warning light illuminated due to emissions issue; Smoke coming from exhaust; Check oil level message displayed; Excessive oil consumption

Repairs/costs cited: Top half of engine needed replacement; cylinder head on backorder; vehicle not repaired; back-over prevention camera also inoperative

Oil filter adapter to block gasket failed and was replaced three times within 41,000 miles. Mechanic inspected the gasket and found it defective. Owner reports this gasket has a design or manufacturing failure. Catastrophic failure could result in radiator fluid leaking out of the vehicle and causing complete stop regardless of location.

When: Three failures within 41,000 miles

Symptoms owners cite: Leaks detected (oil or coolant); No warning light; owner must visually inspect for leaks

Repairs/costs cited: Gasket replaced three times in 41,000 miles; all repairs performed at dealership; owner retained photos of defective gasket

Engine stalls while idling in traffic, accompanied by grinding noise and loss of power. Owner must shift to Park and restart vehicle. After dealer replaced starter, issue resolved temporarily but recurred multiple times within one week.

When: Occurred several times in 2021; five stalls between May 30–June 6, 2022 after starter replacement

Symptoms owners cite: Engine stalls at idle in traffic; Grinding noise from engine; Loss of power; Vehicle requires restart

Repairs/costs cited: Dealer replaced starter; fix was temporary and stalling resumed

Engine stopped suddenly during highway driving on a two-lane road with no shoulder. Driver was able to restart the vehicle and proceed, but owner reports it was fortunate they were not rear-ended.

When: 18:00, 21 July 2021

Symptoms owners cite: Complete engine stoppage while driving; Vehicle coasted to stop

Electronic Throttle Control warning light illuminated while vehicle was being driven at 30 mph, causing steering wheel and entire vehicle to shake. Driver was distracted by the failure, ran a red light, and collided with another vehicle. All front and side airbags deployed. Passenger sustained knee injuries and sought medical attention on the day of accident and the following day. Other vehicle's occupant also sustained knee injury. Vehicle was totaled.

When: Failure at approximately 7,139 miles

Symptoms owners cite: Electronic Throttle Control warning light illuminated; Steering wheel shaking; Entire vehicle shaking; Loss of vehicle control leading to collision

Repairs/costs cited: Vehicle totaled; insurance lot holds vehicle

Recalls/TSBs owners mention: Manufacturer had not been informed of the failure prior to contact with dealership

Oil cap blew off the engine, reported by owner in context of excessive oil consumption.

When: During period of excessive oil consumption (within first 5,000 miles)

Symptoms owners cite: Oil cap blew off