What is the most common problem with the HHR?

The most common problem reported for the Chevrolet HHR is transmission trouble, particularly with the automatic transmission, which can slip, hard-shift, or fail as the vehicle ages.

The HHR, produced from 2006 to 2011, used 2.2L and 2.4L Ecotec engines and shared GM’s Delta platform. While many owners praise its styling and practicality, reliability data and owner reports consistently point to transmission issues as the dominant problem, especially as mileage climbs. This article outlines the top problem and other issues frequently cited by owners and mechanics, along with practical guidance for buyers and current owners.

The following list highlights the issues most commonly reported in owner records and service notes, with brief explanations of symptoms and typical repair considerations.

• Transmission problems — The automatic transmission is the issue most often cited by HHR owners. Symptoms include slipping between gears, hard or delayed shifts, shuddering at common driving speeds, and, in some cases, complete transmission failure. Repairs can range from fluid changes and valve-body work to overhaul or replacement, with costs varying based on mileage and damage extent.


• Engine oil leaks and consumption — The 2.4L Ecotec variant frequently shows oil leaks around the valve-cover gasket and seals, which can lead to oil loss and potential engine-related warnings if not addressed. Typical fixes involve gasket replacement and resealing, along with a broader inspection of the lubrication system.


• Cooling system and water-pump issues — Some HHRs develop leaks or failures in cooling components like the water pump or related hoses, which can cause overheating if not promptly serviced. Replacements are usually straightforward but can be costly depending on accessibility and parts availability.


• Power window regulator failures — Front or rear window regulators can fail, causing windows to bind, move slowly, or not operate at all. Replacement is generally moderate in cost, and parts are widely available.


• Electrical gremlins and sensor problems — Occasional fault codes, intermittent idle issues, or malfunctioning sensors (ABS, wheel speed, EVAP components) can trigger warning lights. These issues are often diagnosed with a scan and may require sensor replacement or wiring checks.

Takeaway: While transmission problems are the standout issue, many HHRs accumulate other wear-related faults as they age. Regular maintenance, prompt addressing of leaks, and thorough inspections can help mitigate these risks.

Context, maintenance, and buying considerations

Engine health and cooling-system upkeep, plus electrical checks, play a major role in the long-term reliability of aging HHRs. If you own one or are considering a used example, expect some transmission work to be a possibility and plan for routine inspections of seals, gaskets, and cooling components alongside standard wear items.

Practical tips for buying and owning a used HHR

When shopping, request complete maintenance records, test-drive to confirm smooth shifting (or note any slipping), inspect for oil leaks around the valve cover, and verify that the cooling system has been serviced recently. A professional pre-purchase inspection is highly recommended for older units.

Summary

In summary, transmission-related problems are the most commonly reported issue for the Chevrolet HHR, followed by oil leaks, cooling-system concerns, window regulator failures, and occasional electrical faults. With diligent maintenance and informed buying decisions, the overall ownership experience can be more predictable.

Are HHR good cars to buy?

HHR's are a great vehicle. Easy to drive and makes a nice little family car. Good for road trips and easy to take care of. Plenty of room in the back for storage. Wish they would make more of them.

What year should I avoid Chevy HHR?

While no single model year is universally "to avoid," the 2006-2011 model years are all susceptible to common issues like rust, timing chain problems, and starter circuit relay failures. It's more important to inspect any used HHR for these specific potential problems, rather than avoiding a particular year entirely. 
This video explains the top 5 problems with the Chevrolet HHR: 1m1A Auto: Repair Tips & Secrets Only Mechanics KnowYouTube · Feb 14, 2021
Common problems across 2006-2011 models 

• Rust: Check for rust on doors, sills, and the undercarriage. 
• Timing chain: Listen for ticking or grinding noises from the engine, which could indicate a timing chain and guide issue. 
• Starter circuit relay: The engine may not crank due to a faulty starter circuit relay. 
• Gas cap: A loose or faulty gas cap can trigger the check engine light. 
• Ignition key: Some owners of the 2006 model reported keys getting stuck in the ignition, requiring replacement of the ignition lock cylinder. 
• Water pump: Listen for noises that could indicate a failing water pump. 

Tips for buying a used HHR

• Get a pre-purchase inspection: Have a trusted mechanic perform a thorough inspection before buying.
• Bring a diagnostic tool: Run a diagnostic test to check for codes.
• Inspect for rust: Check the common problem areas like doors, sills, and the undercarriage for rust.
• Listen to the engine: Start the car and listen for any unusual noises like ticking or grinding.
• Budget for repairs: Expect to have a reserve fund of at least $1,000-$1,500 for potential mechanical issues, especially with older models. 

How many miles does a Chevy HHR last?

iSeeCars analyzed over 300 million vehicles to find out, and to determine how long each model can last. The Chevrolet HHR has an average lifespan of 128,427 miles or about 8.4 years. The HHR's predicted lifespan is derived from over 300 million data points iSeeCars analyzed to determine this model's average lifespan.

What are the main problems with a Chevy HHR?

Common Chevy HHR problems include engine performance issues like rough running and stalling, often linked to VVT solenoid failures or a dirty throttle body. Other frequent issues are power steering loss, erratic gauges, hard shifting, and check engine lights caused by a loose gas cap or other sensors. Owners also report problems with leaky cowlings, door speaker failure, and worn suspension or motor mounts.
 
This video demonstrates the top 5 problems with the first generation Chevy HHR: 1m1A Auto: Repair Tips & Secrets Only Mechanics KnowYouTube · Feb 14, 2021
Engine and performance

• Rough running and stalling: Often caused by a faulty VVT (Variable Valve Timing) solenoid, which can be linked to low or dirty engine oil. 
• Check Engine Light: A common trigger is a loose or faulty gas cap. Other reasons include issues with sensors like the mass air flow or camshaft position sensors. 
• Engine not cranking: This can stem from a starter circuit relay issue. 

You can watch this video to learn how to diagnose and fix misfires in a Chevy HHR: 1mADVANCED LEVEL AUTOYouTube · Jun 22, 2022
Electrical and sensor issues

• Erratic gauges, power steering, and hard shifting: These symptoms frequently point to electrical problems, such as a bad ground to the TCM (Transmission Control Module) or a failing power steering control module. 
• Leaky cowling: The gasket where the hood meets the windshield can leak, leading to wet floors. 

Mechanical and other issues

• Wobbling when taking off: This can be a sign of worn motor or transmission mounts, or an internal transmission fault. 
• Cooling system leaks: Radiator and other hoses can crack and cause leaks, leading to the engine running too hot. 
• Speaker failure: Door speakers are known to fail, especially in older models. 
• Tire pressure sensors: These can malfunction, causing a warning light.