Buick · Known Issues

1999 Buick Park Avenue Problems: 2 Known Issues

1999 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated August 2026

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 1999 Buick Park Avenue has 2 documented known issues, with 2 rated critical. The most serious are Delphi Fuel Pressure Regulator Leak — Backfire and Fire Risk (NHTSA Recall 04V090000) and Park Avenue 3800 V6 Lower Intake Manifold (LIM) Gasket Leak ($400-$1,200 repair). Across all issues with published estimates, repair costs range from $400 to $1,200. DIY maintenance guides at au7o.io.

Frequently Asked Questions

What are the most common Buick Park Avenue problems?

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 1999 Buick Park Avenue has 2 documented issues. The most frequently reported are: Delphi Fuel Pressure Regulator Leak — Backfire and Fire Risk (NHTSA Recall 04V090000), Park Avenue 3800 V6 Lower Intake Manifold (LIM) Gasket Leak. Of these, 2 are rated critical and should be addressed promptly.

Is the Buick Park Avenue reliable?

The 1999 Buick Park Avenue has 2 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 2 issues are rated critical: Delphi Fuel Pressure Regulator Leak — Backfire and Fire Risk (NHTSA Recall 04V090000) and Park Avenue 3800 V6 Lower Intake Manifold (LIM) Gasket Leak. 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 Buick Park Avenue problems?

Repair costs for known Buick Park Avenue issues range from $400 to $1,200, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 1998-2000 Buick Park Avenue Delphi Fuel Pressure Regulator Leak — Backfire and Fire Risk (NHTSA Recall 04V090000)?

The 1998-2000 Park Avenue's 3800 V6 (L36) engine was built with certain Delphi fuel pressure regulators that NHTSA found leak at a much higher than usual rate. On the Park Avenue, a leaking regulator lets fuel pass into the intake manifold through a vacuum line. If the engine is… Severity: high.

What is the 1995-2005 Buick Park Avenue Park Avenue 3800 V6 Lower Intake Manifold (LIM) Gasket Leak?

The 3800 Series II (and early III) V6 in Park Avenue, LeSabre, Riviera, Regal, Lucerne — and shared Pontiac Bonneville/Grand Prix, Olds 88/LSS, Chevy Monte Carlo/Impala — suffers infamous lower intake manifold gasket failure. Plastic intake material softens under coolant exposure… Repairs typically run $400-$1,200. Severity: high.

1999 Buick Park Avenue Problems: 2 Known Issues

All 2 Known Issues

1998-2000 Buick Park Avenue: Delphi Fuel Pressure Regulator Leak — Backfire and Fire Risk (NHTSA Recall 04V090000)#

Common Symptoms

How to Fix

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1995-2005 Buick Park Avenue: Park Avenue 3800 V6 Lower Intake Manifold (LIM) Gasket Leak#