Hyundai · Known Issues

2001-2005 Hyundai XG350 Problems: 4 Known Issues

2001-2005 model years · 150+ owner reports · Updated August 2026

According to Au7o's analysis of 150+ owner reports, the 2001-2005 Hyundai XG350 has 4 documented known issues, with 1 rated critical. The most serious is Timing Belt Tensioner Failure (3.5L Sigma V6) ($500-$1,200 repair). The most commonly reported issue is Power Steering Pump Failure and Line Leaks with 150 owner reports. Across all issues with published estimates, repair costs range from $150 to $1,200. DIY maintenance guides at au7o.io.

Frequently Asked Questions

What are the most common Hyundai XG350 problems?

According to Au7o's analysis of 150+ owner reports, the 2001-2005 Hyundai XG350 has 4 documented issues. The most frequently reported are: Timing Belt Tensioner Failure (3.5L Sigma V6), Power Steering Pump Failure and Line Leaks, Intake Manifold Gasket Leak. Of these, 1 is rated critical and should be addressed promptly.

Is the Hyundai XG350 reliable?

The 2001-2005 Hyundai XG350 has 4 known issues documented across 150+ owner reports. 1 issue is rated critical: Timing Belt Tensioner Failure (3.5L Sigma V6). Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Hyundai XG350 problems?

Repair costs for known Hyundai XG350 issues range from $150 to $1,200, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Timing Belt Tensioner Failure (3.5L Sigma V6), typically costs $500-$1,200 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What year Hyundai XG350 is the most reliable?

Reliability varies across model years of the Hyundai XG350. Based on documented issues, problems are most commonly reported in earlier model years. Au7o recommends checking the specific known issues for your target year before purchasing, and having a pre-purchase inspection performed by a qualified mechanic. Our known issues database covers the 2001-2005 Hyundai XG350 with 4 documented issues documented across 150+ owner reports.

What is the 2001-2005 Hyundai XG350 Timing Belt Tensioner Failure (3.5L Sigma V6)?

The 3.5L Sigma V6 engine in the XG350 uses a timing belt with a hydraulic tensioner that can fail, allowing the belt to lose tension. The tensioner bearing can seize or the hydraulic damper can leak, both leading to belt slack and potential timing jump. The Sigma V6 is an interfe… Repairs typically run $500-$1,200. Severity: high.

What is the 2002-2005 Hyundai XG350 Power Steering Pump Failure and Line Leaks?

The XG350's power steering pump develops internal wear causing whining noise and eventual loss of assist. The high-pressure lines also develop leaks at the crimp fittings. Hot weather and full-lock steering accelerate pump wear. Repairs typically run $200-$600. Severity: medium.

What is the 2002-2005 Hyundai XG350 Intake Manifold Gasket Leak?

The 3.5L V6 intake manifold gaskets deteriorate causing vacuum leaks, rough idle, and lean running conditions. Upper plenum gasket is most common failure point. Can trigger multiple misfire codes. Repairs typically run $250-$500. Severity: medium.

What is the 2002-2005 Hyundai XG350 Power Window Regulator Cable Snap?

Power window regulators use a cable-driven design that is prone to cable breakage, causing the window to drop into the door or jam in a partially open position. Front windows fail most frequently. Repairs typically run $150-$350. Severity: low.

2001-2005 Hyundai XG350 Problems: 4 Known Issues

All 4 Known Issues

Timing Belt Tensioner Failure (3.5L Sigma V6)#

Common Symptoms

How to Fix

What you need to fix it

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Intake Manifold Gasket Leak#

Common Symptoms

How to Fix

What you need to fix it

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Power Steering Pump Failure and Line Leaks#

Common Symptoms

How to Fix

What you need to fix it

Owner tips & cautions

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Power Window Regulator Cable Snap#

Common Symptoms

How to Fix

What you need to fix it

Research This Issue

Other Hyundai Models

Frequently Asked Questions

What are the most common Hyundai XG350 problems?

Is the Hyundai XG350 reliable?

How much does it cost to fix common Hyundai XG350 problems?

What year Hyundai XG350 is the most reliable?

What is the 2001-2005 Hyundai XG350 Timing Belt Tensioner Failure (3.5L Sigma V6)?

What is the 2002-2005 Hyundai XG350 Power Steering Pump Failure and Line Leaks?

What is the 2002-2005 Hyundai XG350 Intake Manifold Gasket Leak?

What is the 2002-2005 Hyundai XG350 Power Window Regulator Cable Snap?